Merge branch 'beta' into keyboard-key-repeat-fix

eslint.config.js

@@ -1,5 +1,5 @@
 import tseslint from '@typescript-eslint/eslint-plugin';
-import stylisticTs from '@stylistic/eslint-plugin-ts'
+import stylisticTs from '@stylistic/eslint-plugin-ts';
 import parser from '@typescript-eslint/parser';
 import importX from 'eslint-plugin-import-x';
 
@@ -16,15 +16,15 @@ export default [
             '@typescript-eslint': tseslint
         },
         rules: {
-            "eqeqeq": ["error", "always"], // Enforces the use of === and !== instead of == and !=
+            "eqeqeq": ["error", "always"], // Enforces the use of `===` and `!==` instead of `==` and `!=`
-            "indent": ["error", 2], // Enforces a 2-space indentation
+            "indent": ["error", 2, { "SwitchCase": 1 }], // Enforces a 2-space indentation, enforces indentation of `case ...:` statements
             "quotes": ["error", "double"], // Enforces the use of double quotes for strings
-            "no-var": "error", // Disallows the use of var, enforcing let or const instead
+            "no-var": "error", // Disallows the use of `var`, enforcing `let` or `const` instead
-            "prefer-const": "error", // Prefers the use of const for variables that are never reassigned
+            "prefer-const": "error", // Enforces the use of `const` for variables that are never reassigned
             "no-undef": "off", // Disables the rule that disallows the use of undeclared variables (TypeScript handles this)
             "@typescript-eslint/no-unused-vars": [ "error", {
                 "args": "none", // Allows unused function parameters. Useful for functions with specific signatures where not all parameters are always used.
-                "ignoreRestSiblings": true // Allows unused variables that are part of a rest property in object destructuring. Useful for excluding certain properties from an object while using the rest.
+                "ignoreRestSiblings": true // Allows unused variables that are part of a rest property in object destructuring. Useful for excluding certain properties from an object while using the others.
             }],
             "eol-last": ["error", "always"], // Enforces at least one newline at the end of files
             "@stylistic/ts/semi": ["error", "always"], // Requires semicolons for TypeScript-specific syntax
@@ -32,14 +32,14 @@ export default [
             "no-extra-semi": ["error"], // Disallows unnecessary semicolons for TypeScript-specific syntax
             "brace-style": "off", // Note: you must disable the base rule as it can report incorrect errors
             "curly": ["error", "all"], // Enforces the use of curly braces for all control statements
-            "@stylistic/ts/brace-style": ["error", "1tbs"],
+            "@stylistic/ts/brace-style": ["error", "1tbs"], // Enforces the following brace style: https://eslint.style/rules/js/brace-style#_1tbs
             "no-trailing-spaces": ["error", { // Disallows trailing whitespace at the end of lines
                 "skipBlankLines": false, // Enforces the rule even on blank lines
                 "ignoreComments": false // Enforces the rule on lines containing comments
             }],
             "space-before-blocks": ["error", "always"], // Enforces a space before blocks
             "keyword-spacing": ["error", { "before": true, "after": true }], // Enforces spacing before and after keywords
-            "comma-spacing": ["error", { "before": false, "after": true }], // Enforces spacing after comma
+            "comma-spacing": ["error", { "before": false, "after": true }], // Enforces spacing after commas
             "import-x/extensions": ["error", "never", { "json": "always" }], // Enforces no extension for imports unless json
             "array-bracket-spacing": ["error", "always", { "objectsInArrays": false, "arraysInArrays": false }], // Enforces consistent spacing inside array brackets
             "object-curly-spacing": ["error", "always", { "arraysInObjects": false, "objectsInObjects": false }], // Enforces consistent spacing inside braces of object literals, destructuring assignments, and import/export specifiers

package-lock.json

@@ -1,12 +1,12 @@
 {
 	"name": "pokemon-rogue-battle",
-	"version": "1.0.4",
+	"version": "1.1.0",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "pokemon-rogue-battle",
-			"version": "1.0.4",
+			"version": "1.1.0",
 			"hasInstallScript": true,
 			"dependencies": {
 				"@material/material-color-utilities": "^0.2.7",

package.json

@@ -1,7 +1,7 @@
 {
 	"name": "pokemon-rogue-battle",
 	"private": true,
-	"version": "1.0.4",
+	"version": "1.1.0",
 	"type": "module",
 	"scripts": {
 		"start": "vite",

public/images/items.json

@@ -3416,12 +3416,12 @@
 					"rotated": false,
 					"trimmed": true,
 					"sourceSize": {
-						"w": 24,
+						"w": 32,
-						"h": 24
+						"h": 32
 					},
 					"spriteSourceSize": {
-						"x": 1,
+						"x": 5,
-						"y": 2,
+						"y": 7,
 						"w": 22,
 						"h": 19
 					},
@@ -8415,6 +8415,6 @@
 	"meta": {
 		"app": "https://www.codeandweb.com/texturepacker",
 		"version": "3.0",
-		"smartupdate": "$TexturePacker:SmartUpdate:934ea4080bad980d4fea720cc771f133:ed564bc47b79b15a763de57045178e88:110e074689c9edd2c54833ce2e4d9270$"
+		"smartupdate": "$TexturePacker:SmartUpdate:9ef21166268f7487fc9ff8d0f9b996e4:82658ac7bdd4c2b417e1f59168179262:110e074689c9edd2c54833ce2e4d9270$"
 	}
 }

src/battle-scene.ts

@@ -4,7 +4,7 @@ import Pokemon, { EnemyPokemon, PlayerPokemon } from "#app/field/pokemon";
 import PokemonSpecies, { allSpecies, getPokemonSpecies, PokemonSpeciesFilter } from "#app/data/pokemon-species";
 import { Constructor, isNullOrUndefined, randSeedInt } from "#app/utils";
 import * as Utils from "#app/utils";
-import { ConsumableModifier, ConsumablePokemonModifier, DoubleBattleChanceBoosterModifier, ExpBalanceModifier, ExpShareModifier, FusePokemonModifier, HealingBoosterModifier, Modifier, ModifierBar, ModifierPredicate, MultipleParticipantExpBonusModifier, overrideHeldItems, overrideModifiers, PersistentModifier, PokemonExpBoosterModifier, PokemonFormChangeItemModifier, PokemonHeldItemModifier, PokemonHpRestoreModifier, PokemonIncrementingStatModifier, TerastallizeModifier, TurnHeldItemTransferModifier } from "./modifier/modifier";
+import { ConsumableModifier, ConsumablePokemonModifier, DoubleBattleChanceBoosterModifier, ExpBalanceModifier, ExpShareModifier, FusePokemonModifier, HealingBoosterModifier, Modifier, ModifierBar, ModifierPredicate, MultipleParticipantExpBonusModifier, overrideHeldItems, overrideModifiers, PersistentModifier, PokemonExpBoosterModifier, PokemonFormChangeItemModifier, PokemonHeldItemModifier, PokemonHpRestoreModifier, PokemonIncrementingStatModifier, RememberMoveModifier, TerastallizeModifier, TurnHeldItemTransferModifier } from "./modifier/modifier";
 import { PokeballType } from "#app/data/pokeball";
 import { initCommonAnims, initMoveAnim, loadCommonAnimAssets, loadMoveAnimAssets, populateAnims } from "#app/data/battle-anims";
 import { Phase } from "#app/phase";
@@ -86,7 +86,7 @@ import { ToggleDoublePositionPhase } from "#app/phases/toggle-double-position-ph
 import { TurnInitPhase } from "#app/phases/turn-init-phase";
 import { ShopCursorTarget } from "#app/enums/shop-cursor-target";
 import MysteryEncounter from "#app/data/mystery-encounters/mystery-encounter";
-import { allMysteryEncounters, ANTI_VARIANCE_WEIGHT_MODIFIER, AVERAGE_ENCOUNTERS_PER_RUN_TARGET, BASE_MYSTERY_ENCOUNTER_SPAWN_WEIGHT, MYSTERY_ENCOUNTER_SPAWN_MAX_WEIGHT, mysteryEncountersByBiome, WEIGHT_INCREMENT_ON_SPAWN_MISS } from "#app/data/mystery-encounters/mystery-encounters";
+import { allMysteryEncounters, ANTI_VARIANCE_WEIGHT_MODIFIER, AVERAGE_ENCOUNTERS_PER_RUN_TARGET, BASE_MYSTERY_ENCOUNTER_SPAWN_WEIGHT, MYSTERY_ENCOUNTER_SPAWN_MAX_WEIGHT, mysteryEncountersByBiome } from "#app/data/mystery-encounters/mystery-encounters";
 import { MysteryEncounterSaveData } from "#app/data/mystery-encounters/mystery-encounter-save-data";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { MysteryEncounterTier } from "#enums/mystery-encounter-tier";
@@ -95,6 +95,7 @@ import { ExpPhase } from "#app/phases/exp-phase";
 import { ShowPartyExpBarPhase } from "#app/phases/show-party-exp-bar-phase";
 import { MysteryEncounterMode } from "#enums/mystery-encounter-mode";
 import { ExpGainsSpeed } from "#enums/exp-gains-speed";
+import { FRIENDSHIP_GAIN_FROM_BATTLE } from "#app/data/balance/starters";
 
 export const bypassLogin = import.meta.env.VITE_BYPASS_LOGIN === "1";
 
@@ -789,7 +790,7 @@ export default class BattleScene extends SceneBase {
   }
 
   getEnemyParty(): EnemyPokemon[] {
-    return this.currentBattle?.enemyParty || [];
+    return this.currentBattle?.enemyParty ?? [];
   }
 
   getEnemyPokemon(): EnemyPokemon | undefined {
@@ -1190,10 +1191,7 @@ export default class BattleScene extends SceneBase {
         if (trainerConfigs[trainerType].doubleOnly) {
           doubleTrainer = true;
         } else if (trainerConfigs[trainerType].hasDouble) {
-          const doubleChance = new Utils.IntegerHolder(newWaveIndex % 10 === 0 ? 32 : 8);
+          doubleTrainer = !Utils.randSeedInt(this.getDoubleBattleChance(newWaveIndex, playerField));
-          this.applyModifiers(DoubleBattleChanceBoosterModifier, true, doubleChance);
-          playerField.forEach(p => applyAbAttrs(DoubleBattleChanceAbAttr, p, null, false, doubleChance));
-          doubleTrainer = !Utils.randSeedInt(doubleChance.value);
           // Add a check that special trainers can't be double except for tate and liza - they should use the normal double chance
           if (trainerConfigs[trainerType].trainerTypeDouble && ![ TrainerType.TATE, TrainerType.LIZA ].includes(trainerType)) {
             doubleTrainer = false;
@@ -1206,12 +1204,10 @@ export default class BattleScene extends SceneBase {
 
       // Check for mystery encounter
       // Can only occur in place of a standard (non-boss) wild battle, waves 10-180
-      if (this.isWaveMysteryEncounter(newBattleType, newWaveIndex, mysteryEncounterType) || newBattleType === BattleType.MYSTERY_ENCOUNTER) {
+      if (this.isWaveMysteryEncounter(newBattleType, newWaveIndex) || newBattleType === BattleType.MYSTERY_ENCOUNTER) {
         newBattleType = BattleType.MYSTERY_ENCOUNTER;
-        // Reset base spawn weight
+        // Reset to base spawn weight
         this.mysteryEncounterSaveData.encounterSpawnChance = BASE_MYSTERY_ENCOUNTER_SPAWN_WEIGHT;
-      } else if (newBattleType === BattleType.WILD) {
-        this.mysteryEncounterSaveData.encounterSpawnChance += WEIGHT_INCREMENT_ON_SPAWN_MISS;
       }
     }
 
@@ -1389,7 +1385,7 @@ export default class BattleScene extends SceneBase {
       case Species.GRENINJA:
         return Utils.randSeedInt(2);
       case Species.ZYGARDE:
-      return Utils.randSeedInt(3);
+        return Utils.randSeedInt(4);
       case Species.MINIOR:
         return Utils.randSeedInt(6);
       case Species.ALCREMIE:
@@ -2363,6 +2359,19 @@ export default class BattleScene extends SceneBase {
     return false;
   }
 
+  /**
+   * Will search for a specific phase in {@linkcode phaseQueuePrepend} via filter, and remove the first result if a match is found.
+   * @param phaseFilter filter function
+   */
+  tryRemoveUnshiftedPhase(phaseFilter: (phase: Phase) => boolean): boolean {
+    const phaseIndex = this.phaseQueuePrepend.findIndex(phaseFilter);
+    if (phaseIndex > -1) {
+      this.phaseQueuePrepend.splice(phaseIndex, 1);
+      return true;
+    }
+    return false;
+  }
+
   /**
    * Tries to add the input phase to index before target phase in the phaseQueue, else simply calls unshiftPhase()
    * @param phase {@linkcode Phase} the phase to be added
@@ -2425,7 +2434,7 @@ export default class BattleScene extends SceneBase {
     return Math.floor(moneyValue / 10) * 10;
   }
 
-  addModifier(modifier: Modifier | null, ignoreUpdate?: boolean, playSound?: boolean, virtual?: boolean, instant?: boolean): Promise<boolean> {
+  addModifier(modifier: Modifier | null, ignoreUpdate?: boolean, playSound?: boolean, virtual?: boolean, instant?: boolean, cost?: number): Promise<boolean> {
     if (!modifier) {
       return Promise.resolve(false);
     }
@@ -2482,6 +2491,8 @@ export default class BattleScene extends SceneBase {
               }
             } else if (modifier instanceof FusePokemonModifier) {
               args.push(this.getPokemonById(modifier.fusePokemonId) as PlayerPokemon);
+            } else if (modifier instanceof RememberMoveModifier && !Utils.isNullOrUndefined(cost)) {
+              args.push(cost);
             }
 
             if (modifier.shouldApply(pokemon, ...args)) {
@@ -3052,7 +3063,7 @@ export default class BattleScene extends SceneBase {
         const pId = partyMember.id;
         const participated = participantIds.has(pId);
         if (participated && pokemonDefeated) {
-          partyMember.addFriendship(2);
+          partyMember.addFriendship(FRIENDSHIP_GAIN_FROM_BATTLE);
           const machoBraceModifier = partyMember.getHeldItems().find(m => m instanceof PokemonIncrementingStatModifier);
           if (machoBraceModifier && machoBraceModifier.stackCount < machoBraceModifier.getMaxStackCount(this)) {
             machoBraceModifier.stackCount++;
@@ -3122,18 +3133,26 @@ export default class BattleScene extends SceneBase {
     }
   }
 
+  /**
+   * Returns if a wave COULD spawn a {@linkcode MysteryEncounter}.
+   * Even if returns `true`, does not guarantee that a wave will actually be a ME.
+   * That check is made in {@linkcode BattleScene.isWaveMysteryEncounter} instead.
+   */
+  isMysteryEncounterValidForWave(battleType: BattleType, waveIndex: number): boolean {
+    const [ lowestMysteryEncounterWave, highestMysteryEncounterWave ] = this.gameMode.getMysteryEncounterLegalWaves();
+    return this.gameMode.hasMysteryEncounters && battleType === BattleType.WILD && !this.gameMode.isBoss(waveIndex) && waveIndex < highestMysteryEncounterWave && waveIndex > lowestMysteryEncounterWave;
+  }
+
   /**
    * Determines whether a wave should randomly generate a {@linkcode MysteryEncounter}.
    * Currently, the only modes that MEs are allowed in are Classic and Challenge.
    * Additionally, MEs cannot spawn outside of waves 10-180 in those modes
-   *
    * @param newBattleType
    * @param waveIndex
-   * @param sessionDataEncounterType
    */
-  private isWaveMysteryEncounter(newBattleType: BattleType, waveIndex: number, sessionDataEncounterType?: MysteryEncounterType): boolean {
+  private isWaveMysteryEncounter(newBattleType: BattleType, waveIndex: number): boolean {
     const [ lowestMysteryEncounterWave, highestMysteryEncounterWave ] = this.gameMode.getMysteryEncounterLegalWaves();
-    if (this.gameMode.hasMysteryEncounters && newBattleType === BattleType.WILD && !this.gameMode.isBoss(waveIndex) && waveIndex < highestMysteryEncounterWave && waveIndex > lowestMysteryEncounterWave) {
+    if (this.isMysteryEncounterValidForWave(newBattleType, waveIndex)) {
       // Base spawn weight is BASE_MYSTERY_ENCOUNTER_SPAWN_WEIGHT/256, and increases by WEIGHT_INCREMENT_ON_SPAWN_MISS/256 for each missed attempt at spawning an encounter on a valid floor
       const sessionEncounterRate = this.mysteryEncounterSaveData.encounterSpawnChance;
       const encounteredEvents = this.mysteryEncounterSaveData.encounteredEvents;
@@ -3174,6 +3193,9 @@ export default class BattleScene extends SceneBase {
     let encounter: MysteryEncounter | null;
     if (!isNullOrUndefined(Overrides.MYSTERY_ENCOUNTER_OVERRIDE) && allMysteryEncounters.hasOwnProperty(Overrides.MYSTERY_ENCOUNTER_OVERRIDE)) {
       encounter = allMysteryEncounters[Overrides.MYSTERY_ENCOUNTER_OVERRIDE];
+      if (canBypass) {
+        return encounter;
+      }
     } else if (canBypass) {
       encounter = allMysteryEncounters[encounterType ?? -1];
       return encounter;

src/data/ability.ts

@@ -4200,6 +4200,11 @@ export class RedirectTypeMoveAbAttr extends RedirectMoveAbAttr {
 
 export class BlockRedirectAbAttr extends AbAttr { }
 
+/**
+ * Used by Early Bird, makes the pokemon wake up faster
+ * @param statusEffect - The {@linkcode StatusEffect} to check for
+ * @see {@linkcode apply}
+ */
 export class ReduceStatusEffectDurationAbAttr extends AbAttr {
   private statusEffect: StatusEffect;
 
@@ -4209,9 +4214,19 @@ export class ReduceStatusEffectDurationAbAttr extends AbAttr {
     this.statusEffect = statusEffect;
   }
 
-  apply(pokemon: Pokemon, passive: boolean, simulated: boolean, cancelled: Utils.BooleanHolder, args: any[]): boolean {
+  /**
+   * Reduces the number of sleep turns remaining by an extra 1 when applied
+   * @param args - The args passed to the `AbAttr`:
+   * - `[0]` - The {@linkcode StatusEffect} of the Pokemon
+   * - `[1]` - The number of turns remaining until the status is healed
+   * @returns `true` if the ability was applied
+   */
+  apply(_pokemon: Pokemon, _passive: boolean, _simulated: boolean, _cancelled: Utils.BooleanHolder, args: any[]): boolean {
+    if (!(args[1] instanceof Utils.NumberHolder)) {
+      return false;
+    }
     if (args[0] === this.statusEffect) {
-      (args[1] as Utils.IntegerHolder).value = Utils.toDmgValue((args[1] as Utils.IntegerHolder).value / 2);
+      args[1].value -= 1;
       return true;
     }
 
@@ -4342,6 +4357,30 @@ export class AlwaysHitAbAttr extends AbAttr { }
 /** Attribute for abilities that allow moves that make contact to ignore protection (i.e. Unseen Fist) */
 export class IgnoreProtectOnContactAbAttr extends AbAttr { }
 
+/**
+ * Attribute implementing the effects of {@link https://bulbapedia.bulbagarden.net/wiki/Infiltrator_(Ability) | Infiltrator}.
+ * Allows the source's moves to bypass the effects of opposing Light Screen, Reflect, Aurora Veil, Safeguard, Mist, and Substitute.
+ */
+export class InfiltratorAbAttr extends AbAttr {
+  /**
+   * Sets a flag to bypass screens, Substitute, Safeguard, and Mist
+   * @param pokemon n/a
+   * @param passive n/a
+   * @param simulated n/a
+   * @param cancelled n/a
+   * @param args `[0]` a {@linkcode Utils.BooleanHolder | BooleanHolder} containing the flag
+   * @returns `true` if the bypass flag was successfully set; `false` otherwise.
+   */
+  override apply(pokemon: Pokemon, passive: boolean, simulated: boolean, cancelled: null, args: any[]): boolean {
+    const bypassed = args[0];
+    if (args[0] instanceof Utils.BooleanHolder) {
+      bypassed.value = true;
+      return true;
+    }
+    return false;
+  }
+}
+
 export class UncopiableAbilityAbAttr extends AbAttr {
   constructor() {
     super(false);
@@ -4913,8 +4952,7 @@ export function initAbilities() {
       .attr(TypeImmunityAddBattlerTagAbAttr, Type.FIRE, BattlerTagType.FIRE_BOOST, 1)
       .ignorable(),
     new Ability(Abilities.SHIELD_DUST, 3)
-      .attr(IgnoreMoveEffectsAbAttr)
+      .attr(IgnoreMoveEffectsAbAttr),
-      .edgeCase(), // Does not work with secret power (unimplemented)
     new Ability(Abilities.OWN_TEMPO, 3)
       .attr(BattlerTagImmunityAbAttr, BattlerTagType.CONFUSED)
       .attr(IntimidateImmunityAbAttr)
@@ -4958,8 +4996,7 @@ export function initAbilities() {
       .attr(TypeImmunityStatStageChangeAbAttr, Type.ELECTRIC, Stat.SPATK, 1)
       .ignorable(),
     new Ability(Abilities.SERENE_GRACE, 3)
-      .attr(MoveEffectChanceMultiplierAbAttr, 2)
+      .attr(MoveEffectChanceMultiplierAbAttr, 2),
-      .edgeCase(), // does not work with secret power (unimplemented)
     new Ability(Abilities.SWIFT_SWIM, 3)
       .attr(StatMultiplierAbAttr, Stat.SPD, 2)
       .condition(getWeatherCondition(WeatherType.RAIN, WeatherType.HEAVY_RAIN)),
@@ -5323,7 +5360,8 @@ export function initAbilities() {
       .attr(PostSummonTransformAbAttr)
       .attr(UncopiableAbilityAbAttr),
     new Ability(Abilities.INFILTRATOR, 5)
-      .unimplemented(),
+      .attr(InfiltratorAbAttr)
+      .partial(), // does not bypass Mist
     new Ability(Abilities.MUMMY, 5)
       .attr(PostDefendAbilityGiveAbAttr, Abilities.MUMMY)
       .bypassFaint(),
@@ -5535,16 +5573,18 @@ export function initAbilities() {
       .attr(UnsuppressableAbilityAbAttr)
       .attr(NoFusionAbilityAbAttr)
       .bypassFaint(),
-    new Ability(Abilities.POWER_CONSTRUCT, 7) // TODO: 10% Power Construct Zygarde isn't accounted for yet. If changed, update Zygarde's getSpeciesFormIndex entry accordingly
+    new Ability(Abilities.POWER_CONSTRUCT, 7)
-      .attr(PostBattleInitFormChangeAbAttr, () => 2)
+      .conditionalAttr(pokemon => pokemon.formIndex === 2 || pokemon.formIndex === 4, PostBattleInitFormChangeAbAttr, () => 2)
-      .attr(PostSummonFormChangeAbAttr, p => p.getHpRatio() <= 0.5 || p.getFormKey() === "complete" ? 4 : 2)
+      .conditionalAttr(pokemon => pokemon.formIndex === 3 || pokemon.formIndex === 5, PostBattleInitFormChangeAbAttr, () => 3)
-      .attr(PostTurnFormChangeAbAttr, p => p.getHpRatio() <= 0.5 || p.getFormKey() === "complete" ? 4 : 2)
+      .conditionalAttr(pokemon => pokemon.formIndex === 2 || pokemon.formIndex === 4, PostSummonFormChangeAbAttr, p => p.getHpRatio() <= 0.5 || p.getFormKey() === "complete" ? 4 : 2)
+      .conditionalAttr(pokemon => pokemon.formIndex === 2 || pokemon.formIndex === 4, PostTurnFormChangeAbAttr, p => p.getHpRatio() <= 0.5 || p.getFormKey() === "complete" ? 4 : 2)
+      .conditionalAttr(pokemon => pokemon.formIndex === 3 || pokemon.formIndex === 5, PostSummonFormChangeAbAttr, p => p.getHpRatio() <= 0.5 || p.getFormKey() === "10-complete" ? 5 : 3)
+      .conditionalAttr(pokemon => pokemon.formIndex === 3 || pokemon.formIndex === 5, PostTurnFormChangeAbAttr, p => p.getHpRatio() <= 0.5 || p.getFormKey() === "10-complete" ? 5 : 3)
       .attr(UncopiableAbilityAbAttr)
       .attr(UnswappableAbilityAbAttr)
       .attr(UnsuppressableAbilityAbAttr)
       .attr(NoFusionAbilityAbAttr)
-      .bypassFaint()
+      .bypassFaint(),
-      .partial(),
     new Ability(Abilities.CORROSION, 7)
       .attr(IgnoreTypeStatusEffectImmunityAbAttr, [ StatusEffect.POISON, StatusEffect.TOXIC ], [ Type.STEEL, Type.POISON ])
       .edgeCase(), // Should interact correctly with magic coat/bounce (not yet implemented), fling with toxic orb (not implemented yet), and synchronize (not fully implemented yet)

src/data/arena-tag.ts

@@ -1,13 +1,13 @@
 import { Arena } from "#app/field/arena";
 import BattleScene from "#app/battle-scene";
 import { Type } from "#app/data/type";
-import * as Utils from "#app/utils";
+import { BooleanHolder, NumberHolder, toDmgValue } from "#app/utils";
 import { MoveCategory, allMoves, MoveTarget, IncrementMovePriorityAttr, applyMoveAttrs } from "#app/data/move";
 import { getPokemonNameWithAffix } from "#app/messages";
 import Pokemon, { HitResult, PokemonMove } from "#app/field/pokemon";
 import { StatusEffect } from "#app/data/status-effect";
 import { BattlerIndex } from "#app/battle";
-import { BlockNonDirectDamageAbAttr, ChangeMovePriorityAbAttr, ProtectStatAbAttr, applyAbAttrs } from "#app/data/ability";
+import { BlockNonDirectDamageAbAttr, ChangeMovePriorityAbAttr, InfiltratorAbAttr, ProtectStatAbAttr, applyAbAttrs } from "#app/data/ability";
 import { Stat } from "#enums/stat";
 import { CommonAnim, CommonBattleAnim } from "#app/data/battle-anims";
 import i18next from "i18next";
@@ -36,7 +36,7 @@ export abstract class ArenaTag {
     public side: ArenaTagSide = ArenaTagSide.BOTH
   ) {}
 
-  apply(arena: Arena, args: any[]): boolean {
+  apply(arena: Arena, simulated: boolean, ...args: unknown[]): boolean {
     return true;
   }
 
@@ -122,10 +122,31 @@ export class MistTag extends ArenaTag {
     }
   }
 
-  apply(arena: Arena, args: any[]): boolean {
+  /**
-    (args[0] as Utils.BooleanHolder).value = true;
+   * Cancels the lowering of stats
+   * @param arena the {@linkcode Arena} containing this effect
+   * @param simulated `true` if the effect should be applied quietly
+   * @param cancelled a {@linkcode BooleanHolder} whose value is set to `true`
+   * to flag the stat reduction as cancelled
+   * @returns `true` if a stat reduction was cancelled; `false` otherwise
+   */
+  override apply(arena: Arena, simulated: boolean, attacker: Pokemon, cancelled: BooleanHolder): boolean {
+    // `StatStageChangePhase` currently doesn't have a reference to the source of stat drops,
+    // so this code currently has no effect on gameplay.
+    if (attacker) {
+      const bypassed = new BooleanHolder(false);
+      // TODO: Allow this to be simulated
+      applyAbAttrs(InfiltratorAbAttr, attacker, null, false, bypassed);
+      if (bypassed.value) {
+        return false;
+      }
+    }
 
+    cancelled.value = true;
+
+    if (!simulated) {
       arena.scene.queueMessage(i18next.t("arenaTag:mistApply"));
+    }
 
     return true;
   }
@@ -157,17 +178,21 @@ export class WeakenMoveScreenTag extends ArenaTag {
   /**
    * Applies the weakening effect to the move.
    *
-   * @param arena - The arena where the move is applied.
+   * @param arena the {@linkcode Arena} where the move is applied.
-   * @param args - The arguments for the move application.
+   * @param simulated n/a
-   * @param args[0] - The category of the move.
+   * @param attacker the attacking {@linkcode Pokemon}
-   * @param args[1] - A boolean indicating whether it is a double battle.
+   * @param moveCategory the attacking move's {@linkcode MoveCategory}.
-   * @param args[2] - An object of type `Utils.NumberHolder` that holds the damage multiplier
+   * @param damageMultiplier A {@linkcode NumberHolder} containing the damage multiplier
-   *
+   * @returns `true` if the attacking move was weakened; `false` otherwise.
-   * @returns True if the move was weakened, otherwise false.
    */
-  apply(arena: Arena, args: any[]): boolean {
+  override apply(arena: Arena, simulated: boolean, attacker: Pokemon, moveCategory: MoveCategory, damageMultiplier: NumberHolder): boolean {
-    if (this.weakenedCategories.includes((args[0] as MoveCategory))) {
+    if (this.weakenedCategories.includes(moveCategory)) {
-      (args[2] as Utils.NumberHolder).value = (args[1] as boolean) ? 2732 / 4096 : 0.5;
+      const bypassed = new BooleanHolder(false);
+      applyAbAttrs(InfiltratorAbAttr, attacker, null, false, bypassed);
+      if (bypassed.value) {
+        return false;
+      }
+      damageMultiplier.value = arena.scene.currentBattle.double ? 2732 / 4096 : 0.5;
       return true;
     }
     return false;
@@ -249,39 +274,35 @@ export class ConditionalProtectTag extends ArenaTag {
   onRemove(arena: Arena): void { }
 
   /**
-   * apply(): Checks incoming moves against the condition function
+   * Checks incoming moves against the condition function
    * and protects the target if conditions are met
-   * @param arena The arena containing this tag
+   * @param arena the {@linkcode Arena} containing this tag
-   * @param args\[0\] (Utils.BooleanHolder) Signals if the move is cancelled
+   * @param simulated `true` if the tag is applied quietly; `false` otherwise.
-   * @param args\[1\] (Pokemon) The Pokemon using the move
+   * @param isProtected a {@linkcode BooleanHolder} used to flag if the move is protected against
-   * @param args\[2\] (Pokemon) The intended target of the move
+   * @param attacker the attacking {@linkcode Pokemon}
-   * @param args\[3\] (Moves) The parameters to the condition function
+   * @param defender the defending {@linkcode Pokemon}
-   * @param args\[4\] (Utils.BooleanHolder) Signals if the applied protection supercedes protection-ignoring effects
+   * @param moveId the {@linkcode Moves | identifier} for the move being used
-   * @returns
+   * @param ignoresProtectBypass a {@linkcode BooleanHolder} used to flag if a protection effect supercedes effects that ignore protection
+   * @returns `true` if this tag protected against the attack; `false` otherwise
    */
-  apply(arena: Arena, args: any[]): boolean {
+  override apply(arena: Arena, simulated: boolean, isProtected: BooleanHolder, attacker: Pokemon, defender: Pokemon,
-    const [ cancelled, user, target, moveId, ignoresBypass ] = args;
+    moveId: Moves, ignoresProtectBypass: BooleanHolder): boolean {
 
-    if (cancelled instanceof Utils.BooleanHolder
+    if ((this.side === ArenaTagSide.PLAYER) === defender.isPlayer()
-        && user instanceof Pokemon
-        && target instanceof Pokemon
-        && typeof moveId === "number"
-        && ignoresBypass instanceof Utils.BooleanHolder) {
-
-      if ((this.side === ArenaTagSide.PLAYER) === target.isPlayer()
         && this.protectConditionFunc(arena, moveId)) {
-        if (!cancelled.value) {
+      if (!isProtected.value) {
-          cancelled.value = true;
+        isProtected.value = true;
-          user.stopMultiHit(target);
+        if (!simulated) {
+          attacker.stopMultiHit(defender);
 
-          new CommonBattleAnim(CommonAnim.PROTECT, target).play(arena.scene);
+          new CommonBattleAnim(CommonAnim.PROTECT, defender).play(arena.scene);
-          arena.scene.queueMessage(i18next.t("arenaTag:conditionalProtectApply", { moveName: super.getMoveName(), pokemonNameWithAffix: getPokemonNameWithAffix(target) }));
+          arena.scene.queueMessage(i18next.t("arenaTag:conditionalProtectApply", { moveName: super.getMoveName(), pokemonNameWithAffix: getPokemonNameWithAffix(defender) }));
+        }
       }
 
-        ignoresBypass.value = ignoresBypass.value || this.ignoresBypass;
+      ignoresProtectBypass.value = ignoresProtectBypass.value || this.ignoresBypass;
       return true;
     }
-    }
     return false;
   }
 }
@@ -296,7 +317,7 @@ export class ConditionalProtectTag extends ArenaTag {
  */
 const QuickGuardConditionFunc: ProtectConditionFunc = (arena, moveId) => {
   const move = allMoves[moveId];
-  const priority = new Utils.NumberHolder(move.priority);
+  const priority = new NumberHolder(move.priority);
   const effectPhase = arena.scene.getCurrentPhase();
 
   if (effectPhase instanceof MoveEffectPhase) {
@@ -460,7 +481,7 @@ class WishTag extends ArenaTag {
       if (user) {
         this.battlerIndex = user.getBattlerIndex();
         this.triggerMessage = i18next.t("arenaTag:wishTagOnAdd", { pokemonNameWithAffix: getPokemonNameWithAffix(user) });
-        this.healHp = Utils.toDmgValue(user.getMaxHp() / 2);
+        this.healHp = toDmgValue(user.getMaxHp() / 2);
       } else {
         console.warn("Failed to get source for WishTag onAdd");
       }
@@ -497,12 +518,19 @@ export class WeakenMoveTypeTag extends ArenaTag {
     this.weakenedType = type;
   }
 
-  apply(arena: Arena, args: any[]): boolean {
+  /**
-    if ((args[0] as Type) === this.weakenedType) {
+   * Reduces an attack's power by 0.33x if it matches this tag's weakened type.
-      (args[1] as Utils.NumberHolder).value *= 0.33;
+   * @param arena n/a
+   * @param simulated n/a
+   * @param type the attack's {@linkcode Type}
+   * @param power a {@linkcode NumberHolder} containing the attack's power
+   * @returns `true` if the attack's power was reduced; `false` otherwise.
+   */
+  override apply(arena: Arena, simulated: boolean, type: Type, power: NumberHolder): boolean {
+    if (type === this.weakenedType) {
+      power.value *= 0.33;
       return true;
     }
-
     return false;
   }
 }
@@ -563,13 +591,12 @@ export class IonDelugeTag extends ArenaTag {
   /**
    * Converts Normal-type moves to Electric type
    * @param arena n/a
-   * @param args
+   * @param simulated n/a
-   * - `[0]` {@linkcode Utils.NumberHolder} A container with a move's {@linkcode Type}
+   * @param moveType a {@linkcode NumberHolder} containing a move's {@linkcode Type}
    * @returns `true` if the given move type changed; `false` otherwise.
    */
-  apply(arena: Arena, args: any[]): boolean {
+  override apply(arena: Arena, simulated: boolean, moveType: NumberHolder): boolean {
-    const moveType = args[0];
+    if (moveType.value === Type.NORMAL) {
-    if (moveType instanceof Utils.NumberHolder && moveType.value === Type.NORMAL) {
       moveType.value = Type.ELECTRIC;
       return true;
     }
@@ -608,16 +635,22 @@ export class ArenaTrapTag extends ArenaTag {
     }
   }
 
-  apply(arena: Arena, args: any[]): boolean {
+  /**
-    const pokemon = args[0] as Pokemon;
+   * Activates the hazard effect onto a Pokemon when it enters the field
-    if (this.sourceId === pokemon.id || (this.side === ArenaTagSide.PLAYER) !== pokemon.isPlayer()) {
+   * @param arena the {@linkcode Arena} containing this tag
+   * @param simulated if `true`, only checks if the hazard would activate.
+   * @param pokemon the {@linkcode Pokemon} triggering this hazard
+   * @returns `true` if this hazard affects the given Pokemon; `false` otherwise.
+   */
+  override apply(arena: Arena, simulated: boolean, pokemon: Pokemon): boolean {
+    if ((this.side === ArenaTagSide.PLAYER) !== pokemon.isPlayer()) {
       return false;
     }
 
-    return this.activateTrap(pokemon);
+    return this.activateTrap(pokemon, simulated);
   }
 
-  activateTrap(pokemon: Pokemon): boolean {
+  activateTrap(pokemon: Pokemon, simulated: boolean): boolean {
     return false;
   }
 
@@ -651,14 +684,18 @@ class SpikesTag extends ArenaTrapTag {
     }
   }
 
-  activateTrap(pokemon: Pokemon): boolean {
+  override activateTrap(pokemon: Pokemon, simulated: boolean): boolean {
     if (pokemon.isGrounded()) {
-      const cancelled = new Utils.BooleanHolder(false);
+      const cancelled = new BooleanHolder(false);
       applyAbAttrs(BlockNonDirectDamageAbAttr, pokemon, cancelled);
 
+      if (simulated) {
+        return !cancelled.value;
+      }
+
       if (!cancelled.value) {
         const damageHpRatio = 1 / (10 - 2 * this.layers);
-        const damage = Utils.toDmgValue(pokemon.getMaxHp() * damageHpRatio);
+        const damage = toDmgValue(pokemon.getMaxHp() * damageHpRatio);
 
         pokemon.scene.queueMessage(i18next.t("arenaTag:spikesActivateTrap", { pokemonNameWithAffix: getPokemonNameWithAffix(pokemon) }));
         pokemon.damageAndUpdate(damage, HitResult.OTHER);
@@ -702,8 +739,11 @@ class ToxicSpikesTag extends ArenaTrapTag {
     }
   }
 
-  activateTrap(pokemon: Pokemon): boolean {
+  override activateTrap(pokemon: Pokemon, simulated: boolean): boolean {
     if (pokemon.isGrounded()) {
+      if (simulated) {
+        return true;
+      }
       if (pokemon.isOfType(Type.POISON)) {
         this.neutralized = true;
         if (pokemon.scene.arena.removeTag(this.tagType)) {
@@ -807,8 +847,8 @@ class StealthRockTag extends ArenaTrapTag {
     return damageHpRatio;
   }
 
-  activateTrap(pokemon: Pokemon): boolean {
+  override activateTrap(pokemon: Pokemon, simulated: boolean): boolean {
-    const cancelled = new Utils.BooleanHolder(false);
+    const cancelled = new BooleanHolder(false);
     applyAbAttrs(BlockNonDirectDamageAbAttr,  pokemon, cancelled);
 
     if (cancelled.value) {
@@ -818,12 +858,16 @@ class StealthRockTag extends ArenaTrapTag {
     const damageHpRatio = this.getDamageHpRatio(pokemon);
 
     if (damageHpRatio) {
-      const damage = Utils.toDmgValue(pokemon.getMaxHp() * damageHpRatio);
+      if (simulated) {
+        return true;
+      }
+      const damage = toDmgValue(pokemon.getMaxHp() * damageHpRatio);
       pokemon.scene.queueMessage(i18next.t("arenaTag:stealthRockActivateTrap", { pokemonNameWithAffix: getPokemonNameWithAffix(pokemon) }));
       pokemon.damageAndUpdate(damage, HitResult.OTHER);
       if (pokemon.turnData) {
         pokemon.turnData.damageTaken += damage;
       }
+      return true;
     }
 
     return false;
@@ -853,14 +897,20 @@ class StickyWebTag extends ArenaTrapTag {
     }
   }
 
-  activateTrap(pokemon: Pokemon): boolean {
+  override activateTrap(pokemon: Pokemon, simulated: boolean): boolean {
     if (pokemon.isGrounded()) {
-      const cancelled = new Utils.BooleanHolder(false);
+      const cancelled = new BooleanHolder(false);
       applyAbAttrs(ProtectStatAbAttr, pokemon, cancelled);
+
+      if (simulated) {
+        return !cancelled.value;
+      }
+
       if (!cancelled.value) {
         pokemon.scene.queueMessage(i18next.t("arenaTag:stickyWebActivateTrap", { pokemonName: pokemon.getNameToRender() }));
-        const stages = new Utils.NumberHolder(-1);
+        const stages = new NumberHolder(-1);
         pokemon.scene.unshiftPhase(new StatStageChangePhase(pokemon.scene, pokemon.getBattlerIndex(), false, [ Stat.SPD ], stages.value));
+        return true;
       }
     }
 
@@ -879,8 +929,15 @@ export class TrickRoomTag extends ArenaTag {
     super(ArenaTagType.TRICK_ROOM, turnCount, Moves.TRICK_ROOM, sourceId);
   }
 
-  apply(arena: Arena, args: any[]): boolean {
+  /**
-    const speedReversed = args[0] as Utils.BooleanHolder;
+   * Reverses Speed-based turn order for all Pokemon on the field
+   * @param arena n/a
+   * @param simulated n/a
+   * @param speedReversed a {@linkcode BooleanHolder} used to flag if Speed-based
+   * turn order should be reversed.
+   * @returns `true` if turn order is successfully reversed; `false` otherwise
+   */
+  override apply(arena: Arena, simulated: boolean, speedReversed: BooleanHolder): boolean {
     speedReversed.value = !speedReversed.value;
     return true;
   }
@@ -1087,7 +1144,7 @@ class FireGrassPledgeTag extends ArenaTag {
       pokemon.scene.queueMessage(i18next.t("arenaTag:fireGrassPledgeLapse", { pokemonNameWithAffix: getPokemonNameWithAffix(pokemon) }));
       // TODO: Replace this with a proper animation
       pokemon.scene.unshiftPhase(new CommonAnimPhase(pokemon.scene, pokemon.getBattlerIndex(), pokemon.getBattlerIndex(), CommonAnim.MAGMA_STORM));
-      pokemon.damageAndUpdate(Utils.toDmgValue(pokemon.getMaxHp() / 8));
+      pokemon.damageAndUpdate(toDmgValue(pokemon.getMaxHp() / 8));
     });
 
     return super.lapse(arena);
@@ -1111,8 +1168,15 @@ class WaterFirePledgeTag extends ArenaTag {
     arena.scene.queueMessage(i18next.t(`arenaTag:waterFirePledgeOnAdd${this.side === ArenaTagSide.PLAYER ? "Player" : this.side === ArenaTagSide.ENEMY ? "Enemy" : ""}`));
   }
 
-  override apply(arena: Arena, args: any[]): boolean {
+  /**
-    const moveChance = args[0] as Utils.NumberHolder;
+   * Doubles the chance for the given move's secondary effect(s) to trigger
+   * @param arena the {@linkcode Arena} containing this tag
+   * @param simulated n/a
+   * @param moveChance a {@linkcode NumberHolder} containing
+   * the move's current effect chance
+   * @returns `true` if the move's effect chance was doubled (currently always `true`)
+   */
+  override apply(arena: Arena, simulated: boolean, moveChance: NumberHolder): boolean {
     moveChance.value *= 2;
     return true;
   }

src/data/balance/starters.ts

@@ -2,6 +2,12 @@ import { Species } from "#enums/species";
 
 export const POKERUS_STARTER_COUNT = 5;
 
+// #region Friendship constants
+export const CLASSIC_CANDY_FRIENDSHIP_MULTIPLIER = 2;
+export const FRIENDSHIP_GAIN_FROM_BATTLE = 2;
+export const FRIENDSHIP_GAIN_FROM_RARE_CANDY = 5;
+export const FRIENDSHIP_LOSS_FROM_FAINT = 10;
+
 /**
  * Function to get the cumulative friendship threshold at which a candy is earned
  * @param starterCost The cost of the starter, found in {@linkcode speciesStarterCosts}

src/data/battler-tags.ts

@@ -1,29 +1,44 @@
-import { ChargeAnim, CommonAnim, CommonBattleAnim, MoveChargeAnim } from "./battle-anims";
+import BattleScene from "#app/battle-scene";
-import { getPokemonNameWithAffix } from "../messages";
+import {
-import Pokemon, { MoveResult, HitResult } from "../field/pokemon";
+  allAbilities,
-import { StatusEffect } from "./status-effect";
+  applyAbAttrs,
-import * as Utils from "../utils";
+  BlockNonDirectDamageAbAttr,
-import { ChargeAttr, MoveFlags, allMoves, MoveCategory, applyMoveAttrs, StatusCategoryOnAllyAttr, HealOnAllyAttr, ConsecutiveUseDoublePowerAttr } from "./move";
+  FlinchEffectAbAttr,
-import { Type } from "./type";
+  ProtectStatAbAttr,
-import { BlockNonDirectDamageAbAttr, FlinchEffectAbAttr, ReverseDrainAbAttr, applyAbAttrs, ProtectStatAbAttr } from "./ability";
+  ReverseDrainAbAttr
-import { TerrainType } from "./terrain";
+} from "#app/data/ability";
-import { WeatherType } from "./weather";
+import { ChargeAnim, CommonAnim, CommonBattleAnim, MoveChargeAnim } from "#app/data/battle-anims";
-import { allAbilities } from "./ability";
+import Move, {
-import { SpeciesFormChangeManualTrigger } from "./pokemon-forms";
+  allMoves,
-import { Abilities } from "#enums/abilities";
+  applyMoveAttrs,
-import { BattlerTagType } from "#enums/battler-tag-type";
+  ChargeAttr,
-import { Moves } from "#enums/moves";
+  ConsecutiveUseDoublePowerAttr,
-import { Species } from "#enums/species";
+  HealOnAllyAttr,
-import i18next from "#app/plugins/i18n";
+  MoveCategory,
-import { Stat, type BattleStat, type EffectiveStat, EFFECTIVE_STATS, getStatKey } from "#app/enums/stat";
+  MoveFlags,
+  StatusCategoryOnAllyAttr
+} from "#app/data/move";
+import { SpeciesFormChangeManualTrigger } from "#app/data/pokemon-forms";
+import { StatusEffect } from "#app/data/status-effect";
+import { TerrainType } from "#app/data/terrain";
+import { Type } from "#app/data/type";
+import { WeatherType } from "#app/data/weather";
+import Pokemon, { HitResult, MoveResult } from "#app/field/pokemon";
+import { getPokemonNameWithAffix } from "#app/messages";
 import { CommonAnimPhase } from "#app/phases/common-anim-phase";
 import { MoveEffectPhase } from "#app/phases/move-effect-phase";
 import { MovePhase } from "#app/phases/move-phase";
 import { PokemonHealPhase } from "#app/phases/pokemon-heal-phase";
 import { ShowAbilityPhase } from "#app/phases/show-ability-phase";
-import { StatStageChangePhase, StatStageChangeCallback } from "#app/phases/stat-stage-change-phase";
+import { StatStageChangeCallback, StatStageChangePhase } from "#app/phases/stat-stage-change-phase";
-import { PokemonAnimType } from "#app/enums/pokemon-anim-type";
+import i18next from "#app/plugins/i18n";
-import BattleScene from "#app/battle-scene";
+import { BooleanHolder, getFrameMs, NumberHolder, toDmgValue } from "#app/utils";
+import { Abilities } from "#enums/abilities";
+import { BattlerTagType } from "#enums/battler-tag-type";
+import { Moves } from "#enums/moves";
+import { PokemonAnimType } from "#enums/pokemon-anim-type";
+import { Species } from "#enums/species";
+import { EFFECTIVE_STATS, getStatKey, Stat, type BattleStat, type EffectiveStat } from "#enums/stat";
 
 export enum BattlerTagLapseType {
   FAINT,
@@ -33,6 +48,7 @@ export enum BattlerTagLapseType {
   MOVE_EFFECT,
   TURN_END,
   HIT,
+  AFTER_HIT,
   CUSTOM
 }
 
@@ -405,7 +421,7 @@ export class RechargingTag extends BattlerTag {
  */
 export class BeakBlastChargingTag extends BattlerTag {
   constructor() {
-    super(BattlerTagType.BEAK_BLAST_CHARGING, [ BattlerTagLapseType.PRE_MOVE, BattlerTagLapseType.TURN_END ], 1, Moves.BEAK_BLAST);
+    super(BattlerTagType.BEAK_BLAST_CHARGING, [ BattlerTagLapseType.PRE_MOVE, BattlerTagLapseType.TURN_END, BattlerTagLapseType.AFTER_HIT ], 1, Moves.BEAK_BLAST);
   }
 
   onAdd(pokemon: Pokemon): void {
@@ -421,16 +437,13 @@ export class BeakBlastChargingTag extends BattlerTag {
    * to be removed after the source makes a move (or the turn ends, whichever comes first)
    * @param pokemon {@linkcode Pokemon} the owner of this tag
    * @param lapseType {@linkcode BattlerTagLapseType} the type of functionality invoked in battle
-   * @returns `true` if invoked with the CUSTOM lapse type; `false` otherwise
+   * @returns `true` if invoked with the `AFTER_HIT` lapse type
    */
   lapse(pokemon: Pokemon, lapseType: BattlerTagLapseType): boolean {
-    if (lapseType === BattlerTagLapseType.CUSTOM) {
+    if (lapseType === BattlerTagLapseType.AFTER_HIT) {
-      const effectPhase = pokemon.scene.getCurrentPhase();
+      const phaseData = getMoveEffectPhaseData(pokemon);
-      if (effectPhase instanceof MoveEffectPhase) {
+      if (phaseData?.move.hasFlag(MoveFlags.MAKES_CONTACT)) {
-        const attacker = effectPhase.getPokemon();
+        phaseData.attacker.trySetStatus(StatusEffect.BURN, true, pokemon);
-        if (effectPhase.move.getMove().checkFlag(MoveFlags.MAKES_CONTACT, attacker, pokemon)) {
-          attacker.trySetStatus(StatusEffect.BURN, true, pokemon);
-        }
       }
       return true;
     }
@@ -444,11 +457,10 @@ export class BeakBlastChargingTag extends BattlerTag {
  * @see {@link https://bulbapedia.bulbagarden.net/wiki/Shell_Trap_(move) | Shell Trap}
  */
 export class ShellTrapTag extends BattlerTag {
-  public activated: boolean;
+  public activated: boolean = false;
 
   constructor() {
-    super(BattlerTagType.SHELL_TRAP, BattlerTagLapseType.TURN_END, 1);
+    super(BattlerTagType.SHELL_TRAP, [ BattlerTagLapseType.TURN_END, BattlerTagLapseType.AFTER_HIT ], 1);
-    this.activated = false;
   }
 
   onAdd(pokemon: Pokemon): void {
@@ -459,10 +471,14 @@ export class ShellTrapTag extends BattlerTag {
    * "Activates" the shell trap, causing the tag owner to move next.
    * @param pokemon {@linkcode Pokemon} the owner of this tag
    * @param lapseType {@linkcode BattlerTagLapseType} the type of functionality invoked in battle
-   * @returns `true` if invoked with the `CUSTOM` lapse type; `false` otherwise
+   * @returns `true` if invoked with the `AFTER_HIT` lapse type
    */
   lapse(pokemon: Pokemon, lapseType: BattlerTagLapseType): boolean {
-    if (lapseType === BattlerTagLapseType.CUSTOM) {
+    if (lapseType === BattlerTagLapseType.AFTER_HIT) {
+      const phaseData = getMoveEffectPhaseData(pokemon);
+
+      // Trap should only be triggered by opponent's Physical moves
+      if (phaseData?.move.category === MoveCategory.PHYSICAL && pokemon.isOpponent(phaseData.attacker)) {
         const shellTrapPhaseIndex = pokemon.scene.phaseQueue.findIndex(
           phase => phase instanceof MovePhase && phase.pokemon === pokemon
         );
@@ -470,14 +486,18 @@ export class ShellTrapTag extends BattlerTag {
           phase => phase instanceof MovePhase
         );
 
+        // Only shift MovePhase timing if it's not already next up
         if (shellTrapPhaseIndex !== -1 && shellTrapPhaseIndex !== firstMovePhaseIndex) {
           const shellTrapMovePhase = pokemon.scene.phaseQueue.splice(shellTrapPhaseIndex, 1)[0];
           pokemon.scene.prependToPhase(shellTrapMovePhase, MovePhase);
         }
 
         this.activated = true;
+      }
+
       return true;
     }
+
     return super.lapse(pokemon, lapseType);
   }
 }
@@ -641,7 +661,7 @@ export class ConfusedTag extends BattlerTag {
       if (pokemon.randSeedInt(3) === 0) {
         const atk = pokemon.getEffectiveStat(Stat.ATK);
         const def = pokemon.getEffectiveStat(Stat.DEF);
-        const damage = Utils.toDmgValue(((((2 * pokemon.level / 5 + 2) * 40 * atk / def) / 50) + 2) * (pokemon.randSeedIntRange(85, 100) / 100));
+        const damage = toDmgValue(((((2 * pokemon.level / 5 + 2) * 40 * atk / def) / 50) + 2) * (pokemon.randSeedIntRange(85, 100) / 100));
         pokemon.scene.queueMessage(i18next.t("battlerTags:confusedLapseHurtItself"));
         pokemon.damageAndUpdate(damage);
         pokemon.battleData.hitCount++;
@@ -812,13 +832,13 @@ export class SeedTag extends BattlerTag {
     if (ret) {
       const source = pokemon.getOpponents().find(o => o.getBattlerIndex() === this.sourceIndex);
       if (source) {
-        const cancelled = new Utils.BooleanHolder(false);
+        const cancelled = new BooleanHolder(false);
         applyAbAttrs(BlockNonDirectDamageAbAttr, pokemon, cancelled);
 
         if (!cancelled.value) {
           pokemon.scene.unshiftPhase(new CommonAnimPhase(pokemon.scene, source.getBattlerIndex(), pokemon.getBattlerIndex(), CommonAnim.LEECH_SEED));
 
-          const damage = pokemon.damageAndUpdate(Utils.toDmgValue(pokemon.getMaxHp() / 8));
+          const damage = pokemon.damageAndUpdate(toDmgValue(pokemon.getMaxHp() / 8));
           const reverseDrain = pokemon.hasAbilityWithAttr(ReverseDrainAbAttr, false);
           pokemon.scene.unshiftPhase(new PokemonHealPhase(pokemon.scene, source.getBattlerIndex(),
             !reverseDrain ? damage : damage * -1,
@@ -838,7 +858,7 @@ export class SeedTag extends BattlerTag {
 
 export class NightmareTag extends BattlerTag {
   constructor() {
-    super(BattlerTagType.NIGHTMARE, BattlerTagLapseType.AFTER_MOVE, 1, Moves.NIGHTMARE);
+    super(BattlerTagType.NIGHTMARE, BattlerTagLapseType.TURN_END, 1, Moves.NIGHTMARE);
   }
 
   onAdd(pokemon: Pokemon): void {
@@ -860,11 +880,11 @@ export class NightmareTag extends BattlerTag {
       pokemon.scene.queueMessage(i18next.t("battlerTags:nightmareLapse", { pokemonNameWithAffix: getPokemonNameWithAffix(pokemon) }));
       pokemon.scene.unshiftPhase(new CommonAnimPhase(pokemon.scene, pokemon.getBattlerIndex(), undefined, CommonAnim.CURSE)); // TODO: Update animation type
 
-      const cancelled = new Utils.BooleanHolder(false);
+      const cancelled = new BooleanHolder(false);
       applyAbAttrs(BlockNonDirectDamageAbAttr, pokemon, cancelled);
 
       if (!cancelled.value) {
-        pokemon.damageAndUpdate(Utils.toDmgValue(pokemon.getMaxHp() / 4));
+        pokemon.damageAndUpdate(toDmgValue(pokemon.getMaxHp() / 4));
       }
     }
 
@@ -1004,7 +1024,7 @@ export class IngrainTag extends TrappedTag {
         new PokemonHealPhase(
           pokemon.scene,
           pokemon.getBattlerIndex(),
-          Utils.toDmgValue(pokemon.getMaxHp() / 16),
+          toDmgValue(pokemon.getMaxHp() / 16),
           i18next.t("battlerTags:ingrainLapse", { pokemonNameWithAffix: getPokemonNameWithAffix(pokemon) }),
           true
         )
@@ -1067,7 +1087,7 @@ export class AquaRingTag extends BattlerTag {
         new PokemonHealPhase(
           pokemon.scene,
           pokemon.getBattlerIndex(),
-          Utils.toDmgValue(pokemon.getMaxHp() / 16),
+          toDmgValue(pokemon.getMaxHp() / 16),
           i18next.t("battlerTags:aquaRingLapse", {
             moveName: this.getMoveName(),
             pokemonName: getPokemonNameWithAffix(pokemon)
@@ -1161,11 +1181,11 @@ export abstract class DamagingTrapTag extends TrappedTag {
       );
       pokemon.scene.unshiftPhase(new CommonAnimPhase(pokemon.scene, pokemon.getBattlerIndex(), undefined, this.commonAnim));
 
-      const cancelled = new Utils.BooleanHolder(false);
+      const cancelled = new BooleanHolder(false);
       applyAbAttrs(BlockNonDirectDamageAbAttr, pokemon, cancelled);
 
       if (!cancelled.value) {
-        pokemon.damageAndUpdate(Utils.toDmgValue(pokemon.getMaxHp() / 8));
+        pokemon.damageAndUpdate(toDmgValue(pokemon.getMaxHp() / 8));
       }
     }
 
@@ -1356,7 +1376,7 @@ export class ContactDamageProtectedTag extends ProtectedTag {
       if (effectPhase instanceof MoveEffectPhase && effectPhase.move.getMove().hasFlag(MoveFlags.MAKES_CONTACT)) {
         const attacker = effectPhase.getPokemon();
         if (!attacker.hasAbilityWithAttr(BlockNonDirectDamageAbAttr)) {
-          attacker.damageAndUpdate(Utils.toDmgValue(attacker.getMaxHp() * (1 / this.damageRatio)), HitResult.OTHER);
+          attacker.damageAndUpdate(toDmgValue(attacker.getMaxHp() * (1 / this.damageRatio)), HitResult.OTHER);
         }
       }
     }
@@ -1709,7 +1729,7 @@ export class SemiInvulnerableTag extends BattlerTag {
   onRemove(pokemon: Pokemon): void {
     // Wait 2 frames before setting visible for battle animations that don't immediately show the sprite invisible
     pokemon.scene.tweens.addCounter({
-      duration: Utils.getFrameMs(2),
+      duration: getFrameMs(2),
       onComplete: () => pokemon.setVisible(true)
     });
   }
@@ -1860,12 +1880,12 @@ export class SaltCuredTag extends BattlerTag {
     if (ret) {
       pokemon.scene.unshiftPhase(new CommonAnimPhase(pokemon.scene, pokemon.getBattlerIndex(), pokemon.getBattlerIndex(), CommonAnim.SALT_CURE));
 
-      const cancelled = new Utils.BooleanHolder(false);
+      const cancelled = new BooleanHolder(false);
       applyAbAttrs(BlockNonDirectDamageAbAttr, pokemon, cancelled);
 
       if (!cancelled.value) {
         const pokemonSteelOrWater = pokemon.isOfType(Type.STEEL) || pokemon.isOfType(Type.WATER);
-        pokemon.damageAndUpdate(Utils.toDmgValue(pokemonSteelOrWater ? pokemon.getMaxHp() / 4 : pokemon.getMaxHp() / 8));
+        pokemon.damageAndUpdate(toDmgValue(pokemonSteelOrWater ? pokemon.getMaxHp() / 4 : pokemon.getMaxHp() / 8));
 
         pokemon.scene.queueMessage(
           i18next.t("battlerTags:saltCuredLapse", {
@@ -1907,11 +1927,11 @@ export class CursedTag extends BattlerTag {
     if (ret) {
       pokemon.scene.unshiftPhase(new CommonAnimPhase(pokemon.scene, pokemon.getBattlerIndex(), pokemon.getBattlerIndex(), CommonAnim.SALT_CURE));
 
-      const cancelled = new Utils.BooleanHolder(false);
+      const cancelled = new BooleanHolder(false);
       applyAbAttrs(BlockNonDirectDamageAbAttr, pokemon, cancelled);
 
       if (!cancelled.value) {
-        pokemon.damageAndUpdate(Utils.toDmgValue(pokemon.getMaxHp() / 4));
+        pokemon.damageAndUpdate(toDmgValue(pokemon.getMaxHp() / 4));
         pokemon.scene.queueMessage(i18next.t("battlerTags:cursedLapse", { pokemonNameWithAffix: getPokemonNameWithAffix(pokemon) }));
       }
     }
@@ -2173,7 +2193,7 @@ export class GulpMissileTag extends BattlerTag {
         return true;
       }
 
-      const cancelled = new Utils.BooleanHolder(false);
+      const cancelled = new BooleanHolder(false);
       applyAbAttrs(BlockNonDirectDamageAbAttr, attacker, cancelled);
 
       if (!cancelled.value) {
@@ -2289,7 +2309,7 @@ export class HealBlockTag extends MoveRestrictionBattlerTag {
    * @returns `true` if the move cannot be used because the target is an ally
    */
   override isMoveTargetRestricted(move: Moves, user: Pokemon, target: Pokemon) {
-    const moveCategory = new Utils.IntegerHolder(allMoves[move].category);
+    const moveCategory = new NumberHolder(allMoves[move].category);
     applyMoveAttrs(StatusCategoryOnAllyAttr, user, target, allMoves[move], moveCategory);
     if (allMoves[move].hasAttr(HealOnAllyAttr) && moveCategory.value === MoveCategory.STATUS ) {
       return true;
@@ -2506,7 +2526,7 @@ export class MysteryEncounterPostSummonTag extends BattlerTag {
     const ret = super.lapse(pokemon, lapseType);
 
     if (lapseType === BattlerTagLapseType.CUSTOM) {
-      const cancelled = new Utils.BooleanHolder(false);
+      const cancelled = new BooleanHolder(false);
       applyAbAttrs(ProtectStatAbAttr, pokemon, cancelled);
       if (!cancelled.value) {
         if (pokemon.mysteryEncounterBattleEffects) {
@@ -2724,6 +2744,44 @@ export class TelekinesisTag extends BattlerTag {
   }
 }
 
+/**
+ * Tag that swaps the user's base ATK stat with its base DEF stat.
+ * @extends BattlerTag
+ */
+export class PowerTrickTag extends BattlerTag {
+  constructor(sourceMove: Moves, sourceId: number) {
+    super(BattlerTagType.POWER_TRICK, BattlerTagLapseType.CUSTOM, 0, sourceMove, sourceId, true);
+  }
+
+  onAdd(pokemon: Pokemon): void {
+    this.swapStat(pokemon);
+    pokemon.scene.queueMessage(i18next.t("battlerTags:powerTrickActive", { pokemonNameWithAffix: getPokemonNameWithAffix(pokemon) }));
+  }
+
+  onRemove(pokemon: Pokemon): void {
+    this.swapStat(pokemon);
+    pokemon.scene.queueMessage(i18next.t("battlerTags:powerTrickActive", { pokemonNameWithAffix: getPokemonNameWithAffix(pokemon) }));
+  }
+
+  /**
+   * Removes the Power Trick tag and reverts any stat changes if the tag is already applied.
+   * @param {Pokemon} pokemon The {@linkcode Pokemon} that already has the Power Trick tag.
+   */
+  onOverlap(pokemon: Pokemon): void {
+    pokemon.removeTag(this.tagType);
+  }
+
+  /**
+   * Swaps the user's base ATK stat with its base DEF stat.
+   * @param {Pokemon} pokemon The {@linkcode Pokemon} whose stats will be swapped.
+   */
+  swapStat(pokemon: Pokemon): void {
+    const temp = pokemon.getStat(Stat.ATK, false);
+    pokemon.setStat(Stat.ATK, pokemon.getStat(Stat.DEF, false), false);
+    pokemon.setStat(Stat.DEF, temp, false);
+  }
+}
+
 /**
  * Retrieves a {@linkcode BattlerTag} based on the provided tag type, turn count, source move, and source ID.
  * @param sourceId - The ID of the pokemon adding the tag
@@ -2899,6 +2957,8 @@ export function getBattlerTag(tagType: BattlerTagType, turnCount: number, source
       return new SyrupBombTag(sourceId);
     case BattlerTagType.TELEKINESIS:
       return new TelekinesisTag(sourceMove);
+    case BattlerTagType.POWER_TRICK:
+      return new PowerTrickTag(sourceMove, sourceId);
     case BattlerTagType.NONE:
     default:
       return new BattlerTag(tagType, BattlerTagLapseType.CUSTOM, turnCount, sourceMove, sourceId);
@@ -2915,3 +2975,22 @@ export function loadBattlerTag(source: BattlerTag | any): BattlerTag {
   tag.loadTag(source);
   return tag;
 }
+
+/**
+ * Helper function to verify that the current phase is a MoveEffectPhase and provide quick access to commonly used fields
+ *
+ * @param pokemon {@linkcode Pokemon} The Pokémon used to access the current phase
+ * @returns null if current phase is not MoveEffectPhase, otherwise Object containing the {@linkcode MoveEffectPhase}, and its
+ * corresponding {@linkcode Move} and user {@linkcode Pokemon}
+ */
+function getMoveEffectPhaseData(pokemon: Pokemon): {phase: MoveEffectPhase, attacker: Pokemon, move: Move} | null {
+  const phase = pokemon.scene.getCurrentPhase();
+  if (phase instanceof MoveEffectPhase) {
+    return {
+      phase     : phase,
+      attacker  : phase.getPokemon(),
+      move      : phase.move.getMove()
+    };
+  }
+  return null;
+}

src/data/custom-pokemon-data.ts

@@ -1,18 +1,20 @@
 import { Abilities } from "#enums/abilities";
 import { Type } from "#app/data/type";
 import { isNullOrUndefined } from "#app/utils";
+import { Nature } from "#enums/nature";
 
 /**
  * Data that can customize a Pokemon in non-standard ways from its Species
- * Currently only used by Mystery Encounters, may need to be renamed if it becomes more widely used
+ * Currently only used by Mystery Encounters and Mints.
  */
-export class MysteryEncounterPokemonData {
+export class CustomPokemonData {
   public spriteScale: number;
   public ability: Abilities | -1;
   public passive: Abilities | -1;
+  public nature: Nature | -1;
   public types: Type[];
 
-  constructor(data?: MysteryEncounterPokemonData | Partial<MysteryEncounterPokemonData>) {
+  constructor(data?: CustomPokemonData | Partial<CustomPokemonData>) {
     if (!isNullOrUndefined(data)) {
       Object.assign(this, data);
     }
@@ -20,6 +22,7 @@ export class MysteryEncounterPokemonData {
     this.spriteScale = this.spriteScale ?? -1;
     this.ability = this.ability ?? -1;
     this.passive = this.passive ?? -1;
+    this.nature = this.nature ?? -1;
     this.types = this.types ?? [];
   }
 }

src/data/move.ts

@@ -8,7 +8,7 @@ import { Constructor, NumberHolder } from "#app/utils";
 import * as Utils from "../utils";
 import { WeatherType } from "./weather";
 import { ArenaTagSide, ArenaTrapTag, WeakenMoveTypeTag } from "./arena-tag";
-import { allAbilities, AllyMoveCategoryPowerBoostAbAttr, applyAbAttrs, applyPostAttackAbAttrs, applyPreAttackAbAttrs, applyPreDefendAbAttrs, BlockItemTheftAbAttr, BlockNonDirectDamageAbAttr, BlockOneHitKOAbAttr, BlockRecoilDamageAttr, ConfusionOnStatusEffectAbAttr, FieldMoveTypePowerBoostAbAttr, FieldPreventExplosiveMovesAbAttr, ForceSwitchOutImmunityAbAttr, HealFromBerryUseAbAttr, IgnoreContactAbAttr, IgnoreMoveEffectsAbAttr, IgnoreProtectOnContactAbAttr, MaxMultiHitAbAttr, MoveAbilityBypassAbAttr, MoveEffectChanceMultiplierAbAttr, MoveTypeChangeAbAttr, ReverseDrainAbAttr, UncopiableAbilityAbAttr, UnsuppressableAbilityAbAttr, UnswappableAbilityAbAttr, UserFieldMoveTypePowerBoostAbAttr, VariableMovePowerAbAttr, WonderSkinAbAttr } from "./ability";
+import { allAbilities, AllyMoveCategoryPowerBoostAbAttr, applyAbAttrs, applyPostAttackAbAttrs, applyPreAttackAbAttrs, applyPreDefendAbAttrs, BlockItemTheftAbAttr, BlockNonDirectDamageAbAttr, BlockOneHitKOAbAttr, BlockRecoilDamageAttr, ConfusionOnStatusEffectAbAttr, FieldMoveTypePowerBoostAbAttr, FieldPreventExplosiveMovesAbAttr, ForceSwitchOutImmunityAbAttr, HealFromBerryUseAbAttr, IgnoreContactAbAttr, IgnoreMoveEffectsAbAttr, IgnoreProtectOnContactAbAttr, InfiltratorAbAttr, MaxMultiHitAbAttr, MoveAbilityBypassAbAttr, MoveEffectChanceMultiplierAbAttr, MoveTypeChangeAbAttr, ReverseDrainAbAttr, UncopiableAbilityAbAttr, UnsuppressableAbilityAbAttr, UnswappableAbilityAbAttr, UserFieldMoveTypePowerBoostAbAttr, VariableMovePowerAbAttr, WonderSkinAbAttr } from "./ability";
 import { AttackTypeBoosterModifier, BerryModifier, PokemonHeldItemModifier, PokemonMoveAccuracyBoosterModifier, PokemonMultiHitModifier, PreserveBerryModifier } from "../modifier/modifier";
 import { BattlerIndex, BattleType } from "../battle";
 import { TerrainType } from "./terrain";
@@ -346,7 +346,11 @@ export default class Move implements Localizable {
       return false;
     }
 
-    return !user.hasAbility(Abilities.INFILTRATOR)
+    const bypassed = new Utils.BooleanHolder(false);
+    // TODO: Allow this to be simulated
+    applyAbAttrs(InfiltratorAbAttr, user, null, false, bypassed);
+
+    return !bypassed.value
         && !this.hasFlag(MoveFlags.SOUND_BASED)
         && !this.hasFlag(MoveFlags.IGNORE_SUBSTITUTE);
   }
@@ -808,7 +812,7 @@ export default class Move implements Localizable {
     source.scene.applyModifiers(PokemonMultiHitModifier, source.isPlayer(), source, new Utils.IntegerHolder(0), power);
 
     if (!this.hasAttr(TypelessAttr)) {
-      source.scene.arena.applyTags(WeakenMoveTypeTag, this.type, power);
+      source.scene.arena.applyTags(WeakenMoveTypeTag, simulated, this.type, power);
       source.scene.applyModifiers(AttackTypeBoosterModifier, source.isPlayer(), source, this.type, power);
     }
 
@@ -1024,9 +1028,9 @@ export class MoveEffectAttr extends MoveAttr {
 
     applyAbAttrs(MoveEffectChanceMultiplierAbAttr, user, null, false, moveChance, move, target, selfEffect, showAbility);
 
-    if (!move.hasAttr(FlinchAttr) || moveChance.value <= move.chance) {
+    if ((!move.hasAttr(FlinchAttr) || moveChance.value <= move.chance) && !move.hasAttr(SecretPowerAttr)) {
       const userSide = user.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY;
-      user.scene.arena.applyTagsForSide(ArenaTagType.WATER_FIRE_PLEDGE, userSide, moveChance);
+      user.scene.arena.applyTagsForSide(ArenaTagType.WATER_FIRE_PLEDGE, userSide, false, moveChance);
     }
 
     if (!selfEffect) {
@@ -2046,15 +2050,15 @@ export class WaterShurikenMultiHitTypeAttr extends ChangeMultiHitTypeAttr {
 
 export class StatusEffectAttr extends MoveEffectAttr {
   public effect: StatusEffect;
-  public cureTurn: integer | null;
+  public turnsRemaining?: number;
-  public overrideStatus: boolean;
+  public overrideStatus: boolean = false;
 
-  constructor(effect: StatusEffect, selfTarget?: boolean, cureTurn?: integer, overrideStatus?: boolean) {
+  constructor(effect: StatusEffect, selfTarget?: boolean, turnsRemaining?: number, overrideStatus: boolean = false) {
     super(selfTarget, MoveEffectTrigger.HIT);
 
     this.effect = effect;
-    this.cureTurn = cureTurn!; // TODO: is this bang correct?
+    this.turnsRemaining = turnsRemaining;
-    this.overrideStatus = !!overrideStatus;
+    this.overrideStatus = overrideStatus;
   }
 
   apply(user: Pokemon, target: Pokemon, move: Move, args: any[]): boolean {
@@ -2074,14 +2078,14 @@ export class StatusEffectAttr extends MoveEffectAttr {
         }
       }
 
-      if (user !== target && target.scene.arena.getTagOnSide(ArenaTagType.SAFEGUARD, target.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY)) {
+      if (user !== target && target.isSafeguarded(user)) {
         if (move.category === MoveCategory.STATUS) {
           user.scene.queueMessage(i18next.t("moveTriggers:safeguard", { targetName: getPokemonNameWithAffix(target) }));
         }
         return false;
       }
       if ((!pokemon.status || (pokemon.status.effect === this.effect && moveChance < 0))
-        && pokemon.trySetStatus(this.effect, true, user, this.cureTurn)) {
+        && pokemon.trySetStatus(this.effect, true, user, this.turnsRemaining)) {
         applyPostAttackAbAttrs(ConfusionOnStatusEffectAbAttr, user, target, move, null, false, this.effect);
         return true;
       }
@@ -2098,8 +2102,8 @@ export class StatusEffectAttr extends MoveEffectAttr {
 export class MultiStatusEffectAttr extends StatusEffectAttr {
   public effects: StatusEffect[];
 
-  constructor(effects: StatusEffect[], selfTarget?: boolean, cureTurn?: integer, overrideStatus?: boolean) {
+  constructor(effects: StatusEffect[], selfTarget?: boolean, turnsRemaining?: number, overrideStatus?: boolean) {
-    super(effects[0], selfTarget, cureTurn, overrideStatus);
+    super(effects[0], selfTarget, turnsRemaining, overrideStatus);
     this.effects = effects;
   }
 
@@ -2875,6 +2879,162 @@ export class StatStageChangeAttr extends MoveEffectAttr {
   }
 }
 
+/**
+ * Attribute used to determine the Biome/Terrain-based secondary effect of Secret Power
+ */
+export class SecretPowerAttr extends MoveEffectAttr {
+  constructor() {
+    super(false);
+  }
+
+  /**
+   * Used to determine if the move should apply a secondary effect based on Secret Power's 30% chance
+   * @returns `true` if the move's secondary effect should apply
+   */
+  override canApply(user: Pokemon, target: Pokemon, move: Move, args?: any[]): boolean {
+    this.effectChanceOverride = move.chance;
+    const moveChance = this.getMoveChance(user, target, move, this.selfTarget);
+    if (moveChance < 0 || moveChance === 100 || user.randSeedInt(100) < moveChance) {
+      return true;
+    } else {
+      return false;
+    }
+  }
+
+  /**
+   * Used to apply the secondary effect to the target Pokemon
+   * @returns `true` if a secondary effect is successfully applied
+   */
+  override apply(user: Pokemon, target: Pokemon, move: Move, args?: any[]): boolean | Promise<boolean> {
+    if (!super.apply(user, target, move, args)) {
+      return false;
+    }
+    let secondaryEffect: MoveEffectAttr;
+    const terrain = user.scene.arena.getTerrainType();
+    if (terrain !== TerrainType.NONE) {
+      secondaryEffect = this.determineTerrainEffect(terrain);
+    } else {
+      const biome = user.scene.arena.biomeType;
+      secondaryEffect = this.determineBiomeEffect(biome);
+    }
+    // effectChanceOverride used in the application of the actual secondary effect
+    secondaryEffect.effectChanceOverride = 100;
+    return secondaryEffect.apply(user, target, move, []);
+  }
+
+  /**
+   * Determines the secondary effect based on terrain.
+   * Takes precedence over biome-based effects.
+   * ```
+   * Electric Terrain | Paralysis
+   * Misty Terrain    | SpAtk -1
+   * Grassy Terrain   | Sleep
+   * Psychic Terrain  | Speed -1
+   * ```
+   * @param terrain - {@linkcode TerrainType} The current terrain
+   * @returns the chosen secondary effect {@linkcode MoveEffectAttr}
+   */
+  private determineTerrainEffect(terrain: TerrainType): MoveEffectAttr {
+    let secondaryEffect: MoveEffectAttr;
+    switch (terrain) {
+      case TerrainType.ELECTRIC:
+      default:
+        secondaryEffect = new StatusEffectAttr(StatusEffect.PARALYSIS, false);
+        break;
+      case TerrainType.MISTY:
+        secondaryEffect = new StatStageChangeAttr([ Stat.SPATK ], -1, false);
+        break;
+      case TerrainType.GRASSY:
+        secondaryEffect = new StatusEffectAttr(StatusEffect.SLEEP, false);
+        break;
+      case TerrainType.PSYCHIC:
+        secondaryEffect = new StatStageChangeAttr([ Stat.SPD ], -1, false);
+        break;
+    }
+    return secondaryEffect;
+  }
+
+  /**
+   * Determines the secondary effect based on biome
+   * ```
+   * Town, Metropolis, Slum, Dojo, Laboratory, Power Plant + Default | Paralysis
+   * Plains, Grass, Tall Grass, Forest, Jungle, Meadow               | Sleep
+   * Swamp, Mountain, Temple, Ruins                                  | Speed -1
+   * Ice Cave, Snowy Forest                                          | Freeze
+   * Volcano                                                         | Burn
+   * Fairy Cave                                                      | SpAtk -1
+   * Desert, Construction Site, Beach, Island, Badlands              | Accuracy -1
+   * Sea, Lake, Seabed                                               | Atk -1
+   * Cave, Wasteland, Graveyard, Abyss, Space                        | Flinch
+   * End                                                             | Def -1
+   * ```
+   * @param biome - The current {@linkcode Biome} the battle is set in
+   * @returns the chosen secondary effect {@linkcode MoveEffectAttr}
+   */
+  private determineBiomeEffect(biome: Biome): MoveEffectAttr {
+    let secondaryEffect: MoveEffectAttr;
+    switch (biome) {
+      case Biome.PLAINS:
+      case Biome.GRASS:
+      case Biome.TALL_GRASS:
+      case Biome.FOREST:
+      case Biome.JUNGLE:
+      case Biome.MEADOW:
+        secondaryEffect = new StatusEffectAttr(StatusEffect.SLEEP, false);
+        break;
+      case Biome.SWAMP:
+      case Biome.MOUNTAIN:
+      case Biome.TEMPLE:
+      case Biome.RUINS:
+        secondaryEffect = new StatStageChangeAttr([ Stat.SPD ], -1, false);
+        break;
+      case Biome.ICE_CAVE:
+      case Biome.SNOWY_FOREST:
+        secondaryEffect = new StatusEffectAttr(StatusEffect.FREEZE, false);
+        break;
+      case Biome.VOLCANO:
+        secondaryEffect = new StatusEffectAttr(StatusEffect.BURN, false);
+        break;
+      case Biome.FAIRY_CAVE:
+        secondaryEffect = new StatStageChangeAttr([ Stat.SPATK ], -1, false);
+        break;
+      case Biome.DESERT:
+      case Biome.CONSTRUCTION_SITE:
+      case Biome.BEACH:
+      case Biome.ISLAND:
+      case Biome.BADLANDS:
+        secondaryEffect = new StatStageChangeAttr([ Stat.ACC ], -1, false);
+        break;
+      case Biome.SEA:
+      case Biome.LAKE:
+      case Biome.SEABED:
+        secondaryEffect = new StatStageChangeAttr([ Stat.ATK ], -1, false);
+        break;
+      case Biome.CAVE:
+      case Biome.WASTELAND:
+      case Biome.GRAVEYARD:
+      case Biome.ABYSS:
+      case Biome.SPACE:
+        secondaryEffect = new AddBattlerTagAttr(BattlerTagType.FLINCHED, false, true);
+        break;
+      case Biome.END:
+        secondaryEffect = new StatStageChangeAttr([ Stat.DEF ], -1, false);
+        break;
+      case Biome.TOWN:
+      case Biome.METROPOLIS:
+      case Biome.SLUM:
+      case Biome.DOJO:
+      case Biome.FACTORY:
+      case Biome.LABORATORY:
+      case Biome.POWER_PLANT:
+      default:
+        secondaryEffect = new StatusEffectAttr(StatusEffect.PARALYSIS, false);
+        break;
+    }
+    return secondaryEffect;
+  }
+}
+
 export class PostVictoryStatStageChangeAttr extends MoveAttr {
   private stats: BattleStat[];
   private stages: number;
@@ -3834,8 +3994,8 @@ export class LastMoveDoublePowerAttr extends VariablePowerAttr {
 
     for (const p of pokemonActed) {
       const [ lastMove ] = p.getLastXMoves(1);
-      if (lastMove.result !== MoveResult.FAIL) {
+      if (lastMove?.result !== MoveResult.FAIL) {
-        if ((lastMove.result === MoveResult.SUCCESS) && (lastMove.move === this.move)) {
+        if ((lastMove?.result === MoveResult.SUCCESS) && (lastMove?.move === this.move)) {
           power.value *= 2;
           return true;
         } else {
@@ -4736,7 +4896,7 @@ export class AddBattlerTagAttr extends MoveEffectAttr {
   }
 
   canApply(user: Pokemon, target: Pokemon, move: Move, args: any[]): boolean {
-    if (!super.canApply(user, target, move, args) || (this.cancelOnFail === true && user.getLastXMoves(1)[0].result === MoveResult.FAIL)) {
+    if (!super.canApply(user, target, move, args) || (this.cancelOnFail === true && user.getLastXMoves(1)[0]?.result === MoveResult.FAIL)) {
       return false;
     } else {
       return true;
@@ -5005,7 +5165,7 @@ export class ConfuseAttr extends AddBattlerTagAttr {
   }
 
   apply(user: Pokemon, target: Pokemon, move: Move, args: any[]): boolean {
-    if (!this.selfTarget && target.scene.arena.getTagOnSide(ArenaTagType.SAFEGUARD, target.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY)) {
+    if (!this.selfTarget && target.isSafeguarded(user)) {
       if (move.category === MoveCategory.STATUS) {
         user.scene.queueMessage(i18next.t("moveTriggers:safeguard", { targetName: getPokemonNameWithAffix(target) }));
       }
@@ -5174,7 +5334,7 @@ export class AddArenaTagAttr extends MoveEffectAttr {
       return false;
     }
 
-    if ((move.chance < 0 || move.chance === 100 || user.randSeedInt(100) < move.chance) && user.getLastXMoves(1)[0].result === MoveResult.SUCCESS) {
+    if ((move.chance < 0 || move.chance === 100 || user.randSeedInt(100) < move.chance) && user.getLastXMoves(1)[0]?.result === MoveResult.SUCCESS) {
       user.scene.arena.addTag(this.tagType, this.turnCount, move.id, user.id, (this.selfSideTarget ? user : target).isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY);
       return true;
     }
@@ -5249,7 +5409,7 @@ export class AddArenaTrapTagHitAttr extends AddArenaTagAttr {
     const moveChance = this.getMoveChance(user, target, move, this.selfTarget, true);
     const side = (this.selfSideTarget ? user : target).isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY;
     const tag = user.scene.arena.getTagOnSide(this.tagType, side) as ArenaTrapTag;
-    if ((moveChance < 0 || moveChance === 100 || user.randSeedInt(100) < moveChance) && user.getLastXMoves(1)[0].result === MoveResult.SUCCESS) {
+    if ((moveChance < 0 || moveChance === 100 || user.randSeedInt(100) < moveChance) && user.getLastXMoves(1)[0]?.result === MoveResult.SUCCESS) {
       user.scene.arena.addTag(this.tagType, 0, move.id, user.id, side);
       if (!tag) {
         return true;
@@ -5386,7 +5546,7 @@ export class AddPledgeEffectAttr extends AddArenaTagAttr {
 
   override apply(user: Pokemon, target: Pokemon, move: Move, args: any[]): boolean {
     // TODO: add support for `HIT` effect triggering in AddArenaTagAttr to remove the need for this check
-    if (user.getLastXMoves(1)[0].result !== MoveResult.SUCCESS) {
+    if (user.getLastXMoves(1)[0]?.result !== MoveResult.SUCCESS) {
       return false;
     }
 
@@ -6430,6 +6590,9 @@ export class TransformAttr extends MoveEffectAttr {
       user.summonData.gender = target.getGender();
       user.summonData.fusionGender = target.getFusionGender();
 
+      // Power Trick's effect will not preserved after using Transform
+      user.removeTag(BattlerTagType.POWER_TRICK);
+
       // Copy all stats (except HP)
       for (const s of EFFECTIVE_STATS) {
         user.setStat(s, target.getStat(s, false), false);
@@ -7439,6 +7602,7 @@ export function initMoves() {
       .ignoresVirtual(),
     new StatusMove(Moves.TRANSFORM, Type.NORMAL, -1, 10, -1, 0, 1)
       .attr(TransformAttr)
+      .condition((user, target, move) => !target.getTag(BattlerTagType.SUBSTITUTE))
       .ignoresProtect(),
     new AttackMove(Moves.BUBBLE, Type.WATER, MoveCategory.SPECIAL, 40, 100, 30, 10, 0, 1)
       .attr(StatStageChangeAttr, [ Stat.SPD ], -1)
@@ -7869,7 +8033,7 @@ export function initMoves() {
       .attr(RemoveScreensAttr),
     new StatusMove(Moves.YAWN, Type.NORMAL, -1, 10, -1, 0, 3)
       .attr(AddBattlerTagAttr, BattlerTagType.DROWSY, false, true)
-      .condition((user, target, move) => !target.status && !target.scene.arena.getTagOnSide(ArenaTagType.SAFEGUARD, target.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY)),
+      .condition((user, target, move) => !target.status && !target.isSafeguarded(user)),
     new AttackMove(Moves.KNOCK_OFF, Type.DARK, MoveCategory.PHYSICAL, 65, 100, 20, -1, 0, 3)
       .attr(MovePowerMultiplierAttr, (user, target, move) => target.getHeldItems().filter(i => i.isTransferable).length > 0 ? 1.5 : 1)
       .attr(RemoveHeldItemAttr, false),
@@ -7895,7 +8059,7 @@ export function initMoves() {
       .unimplemented(),
     new AttackMove(Moves.SECRET_POWER, Type.NORMAL, MoveCategory.PHYSICAL, 70, 100, 20, 30, 0, 3)
       .makesContact(false)
-      .partial(), // No effect implemented
+      .attr(SecretPowerAttr),
     new AttackMove(Moves.DIVE, Type.WATER, MoveCategory.PHYSICAL, 80, 100, 10, -1, 0, 3)
       .attr(ChargeAttr, ChargeAnim.DIVE_CHARGING, i18next.t("moveTriggers:hidUnderwater", { pokemonName: "{USER}" }), BattlerTagType.UNDERWATER, true)
       .attr(GulpMissileTagAttr)
@@ -8153,7 +8317,7 @@ export function initMoves() {
       .attr(OpponentHighHpPowerAttr, 120)
       .makesContact(),
     new SelfStatusMove(Moves.POWER_TRICK, Type.PSYCHIC, -1, 10, -1, 0, 4)
-      .unimplemented(),
+      .attr(AddBattlerTagAttr, BattlerTagType.POWER_TRICK, true),
     new StatusMove(Moves.GASTRO_ACID, Type.POISON, 100, 10, -1, 0, 4)
       .attr(SuppressAbilitiesAttr),
     new StatusMove(Moves.LUCKY_CHANT, Type.NORMAL, -1, 30, -1, 0, 4)

src/data/mystery-encounters/encounters/a-trainers-test-encounter.ts

@@ -154,7 +154,7 @@ export const ATrainersTestEncounter: MysteryEncounter =
         };
         encounter.setDialogueToken("eggType", i18next.t(`${namespace}:eggTypes.epic`));
         setEncounterRewards(scene, { guaranteedModifierTypeFuncs: [ modifierTypes.SACRED_ASH ], guaranteedModifierTiers: [ ModifierTier.ROGUE, ModifierTier.ULTRA ], fillRemaining: true }, [ eggOptions ]);
-        return initBattleWithEnemyConfig(scene, config);
+        await initBattleWithEnemyConfig(scene, config);
       }
     )
     .withSimpleOption(

src/data/mystery-encounters/encounters/absolute-avarice-encounter.ts

@@ -286,7 +286,7 @@ export const AbsoluteAvariceEncounter: MysteryEncounter =
             ignorePp: true
           });
 
-          transitionMysteryEncounterIntroVisuals(scene, true, true, 500);
+          await transitionMysteryEncounterIntroVisuals(scene, true, true, 500);
           await initBattleWithEnemyConfig(scene, encounter.enemyPartyConfigs[0]);
         })
         .build()
@@ -328,7 +328,7 @@ export const AbsoluteAvariceEncounter: MysteryEncounter =
           });
           await scene.updateModifiers(true);
 
-          transitionMysteryEncounterIntroVisuals(scene, true, true, 500);
+          await transitionMysteryEncounterIntroVisuals(scene, true, true, 500);
           leaveEncounterWithoutBattle(scene, true);
         })
         .build()
@@ -359,7 +359,7 @@ export const AbsoluteAvariceEncounter: MysteryEncounter =
           greedent.moveset = [ new PokemonMove(Moves.THRASH), new PokemonMove(Moves.BODY_PRESS), new PokemonMove(Moves.STUFF_CHEEKS), new PokemonMove(Moves.SLACK_OFF) ];
           greedent.passive = true;
 
-          transitionMysteryEncounterIntroVisuals(scene, true, true, 500);
+          await transitionMysteryEncounterIntroVisuals(scene, true, true, 500);
           await catchPokemon(scene, greedent, null, PokeballType.POKEBALL, false);
           leaveEncounterWithoutBattle(scene, true);
         })

src/data/mystery-encounters/encounters/an-offer-you-cant-refuse-encounter.ts

@@ -133,8 +133,8 @@ export const AnOfferYouCantRefuseEncounter: MysteryEncounter =
       MysteryEncounterOptionBuilder
         .newOptionWithMode(MysteryEncounterOptionMode.DISABLED_OR_SPECIAL)
         .withPrimaryPokemonRequirement(new CombinationPokemonRequirement(
-          new MoveRequirement(EXTORTION_MOVES),
+          new MoveRequirement(EXTORTION_MOVES, true),
-          new AbilityRequirement(EXTORTION_ABILITIES))
+          new AbilityRequirement(EXTORTION_ABILITIES, true))
         )
         .withDialogue({
           buttonLabel: `${namespace}:option.2.label`,

src/data/mystery-encounters/encounters/bug-type-superfan-encounter.ts

@@ -42,6 +42,8 @@ import {
   AttackTypeBoosterModifier,
   BypassSpeedChanceModifier,
   ContactHeldItemTransferChanceModifier,
+  GigantamaxAccessModifier,
+  MegaEvolutionAccessModifier,
   PokemonHeldItemModifier
 } from "#app/modifier/modifier";
 import i18next from "i18next";
@@ -356,10 +358,17 @@ export const BugTypeSuperfanEncounter: MysteryEncounter =
             },
           ];
         } else {
-          // If player has any evolution/form change items that are valid for their party, will spawn one of those items in addition to a Master Ball
+          // If the player has any evolution/form change items that are valid for their party,
-          const modifierOptions: ModifierTypeOption[] = [ generateModifierTypeOption(scene, modifierTypes.MASTER_BALL)!, generateModifierTypeOption(scene, modifierTypes.MAX_LURE)! ];
+          // spawn one of those items in addition to Dynamax Band, Mega Band, and Master Ball
+          const modifierOptions: ModifierTypeOption[] = [ generateModifierTypeOption(scene, modifierTypes.MASTER_BALL)! ];
           const specialOptions: ModifierTypeOption[] = [];
 
+          if (!scene.findModifier(m => m instanceof MegaEvolutionAccessModifier)) {
+            modifierOptions.push(generateModifierTypeOption(scene, modifierTypes.MEGA_BRACELET)!);
+          }
+          if (!scene.findModifier(m => m instanceof GigantamaxAccessModifier)) {
+            modifierOptions.push(generateModifierTypeOption(scene, modifierTypes.DYNAMAX_BAND)!);
+          }
           const nonRareEvolutionModifier = generateModifierTypeOption(scene, modifierTypes.EVOLUTION_ITEM);
           if (nonRareEvolutionModifier) {
             specialOptions.push(nonRareEvolutionModifier);

src/data/mystery-encounters/encounters/clowning-around-encounter.ts

@@ -28,7 +28,7 @@ import { BattlerIndex } from "#app/battle";
 import { Moves } from "#enums/moves";
 import { EncounterBattleAnim } from "#app/data/battle-anims";
 import { MoveCategory } from "#app/data/move";
-import { MysteryEncounterPokemonData } from "#app/data/mystery-encounters/mystery-encounter-pokemon-data";
+import { CustomPokemonData } from "#app/data/custom-pokemon-data";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/game-mode";
 import { EncounterAnim } from "#enums/encounter-anims";
 import { Challenges } from "#enums/challenges";
@@ -133,7 +133,7 @@ export const ClowningAroundEncounter: MysteryEncounter =
           },
           { // Blacephalon has the random ability from pool, and 2 entirely random types to fit with the theme of the encounter
             species: getPokemonSpecies(Species.BLACEPHALON),
-            mysteryEncounterPokemonData: new MysteryEncounterPokemonData({ ability: ability, types: [ randSeedInt(18), randSeedInt(18) ]}),
+            customPokemonData: new CustomPokemonData({ ability: ability, types: [ randSeedInt(18), randSeedInt(18) ]}),
             isBoss: true,
             moveSet: [ Moves.TRICK, Moves.HYPNOSIS, Moves.SHADOW_BALL, Moves.MIND_BLOWN ]
           },
@@ -353,15 +353,15 @@ export const ClowningAroundEncounter: MysteryEncounter =
             newTypes.push(secondType);
 
             // Apply the type changes (to both base and fusion, if pokemon is fused)
-            if (!pokemon.mysteryEncounterPokemonData) {
+            if (!pokemon.customPokemonData) {
-              pokemon.mysteryEncounterPokemonData = new MysteryEncounterPokemonData();
+              pokemon.customPokemonData = new CustomPokemonData();
             }
-            pokemon.mysteryEncounterPokemonData.types = newTypes;
+            pokemon.customPokemonData.types = newTypes;
             if (pokemon.isFusion()) {
-              if (!pokemon.fusionMysteryEncounterPokemonData) {
+              if (!pokemon.fusionCustomPokemonData) {
-                pokemon.fusionMysteryEncounterPokemonData = new MysteryEncounterPokemonData();
+                pokemon.fusionCustomPokemonData = new CustomPokemonData();
               }
-              pokemon.fusionMysteryEncounterPokemonData.types = newTypes;
+              pokemon.fusionCustomPokemonData.types = newTypes;
             }
           }
         })
@@ -426,15 +426,15 @@ function onYesAbilitySwap(scene: BattleScene, resolve) {
     // Do ability swap
     const encounter = scene.currentBattle.mysteryEncounter!;
     if (pokemon.isFusion()) {
-      if (!pokemon.fusionMysteryEncounterPokemonData) {
+      if (!pokemon.fusionCustomPokemonData) {
-        pokemon.fusionMysteryEncounterPokemonData = new MysteryEncounterPokemonData();
+        pokemon.fusionCustomPokemonData = new CustomPokemonData();
       }
-      pokemon.fusionMysteryEncounterPokemonData.ability = encounter.misc.ability;
+      pokemon.fusionCustomPokemonData.ability = encounter.misc.ability;
     } else {
-      if (!pokemon.mysteryEncounterPokemonData) {
+      if (!pokemon.customPokemonData) {
-        pokemon.mysteryEncounterPokemonData = new MysteryEncounterPokemonData();
+        pokemon.customPokemonData = new CustomPokemonData();
       }
-      pokemon.mysteryEncounterPokemonData.ability = encounter.misc.ability;
+      pokemon.customPokemonData.ability = encounter.misc.ability;
     }
     encounter.setDialogueToken("chosenPokemon", pokemon.getNameToRender());
     scene.ui.setMode(Mode.MESSAGE).then(() => resolve(true));

src/data/mystery-encounters/encounters/dancing-lessons-encounter.ts

@@ -228,7 +228,7 @@ export const DancingLessonsEncounter: MysteryEncounter =
         })
         .withOptionPhase(async (scene: BattleScene) => {
           // Learn its Dance
-          hideOricorioPokemon(scene);
+          await hideOricorioPokemon(scene);
           leaveEncounterWithoutBattle(scene, true);
         })
         .build()
@@ -236,7 +236,7 @@ export const DancingLessonsEncounter: MysteryEncounter =
     .withOption(
       MysteryEncounterOptionBuilder
         .newOptionWithMode(MysteryEncounterOptionMode.DISABLED_OR_SPECIAL)
-        .withPrimaryPokemonRequirement(new MoveRequirement(DANCING_MOVES)) // Will set option3PrimaryName and option3PrimaryMove dialogue tokens automatically
+        .withPrimaryPokemonRequirement(new MoveRequirement(DANCING_MOVES, true)) // Will set option3PrimaryName and option3PrimaryMove dialogue tokens automatically
         .withDialogue({
           buttonLabel: `${namespace}:option.3.label`,
           buttonTooltip: `${namespace}:option.3.tooltip`,
@@ -303,7 +303,7 @@ export const DancingLessonsEncounter: MysteryEncounter =
             }
           }
 
-          hideOricorioPokemon(scene);
+          await hideOricorioPokemon(scene);
           await catchPokemon(scene, oricorio, null, PokeballType.POKEBALL, false);
           leaveEncounterWithoutBattle(scene, true);
         })

src/data/mystery-encounters/encounters/dark-deal-encounter.ts

@@ -182,7 +182,7 @@ export const DarkDealEncounter: MysteryEncounter =
           const config: EnemyPartyConfig = {
             pokemonConfigs: [ pokemonConfig ],
           };
-          return initBattleWithEnemyConfig(scene, config);
+          await initBattleWithEnemyConfig(scene, config);
         })
         .build()
     )

src/data/mystery-encounters/encounters/fiery-fallout-encounter.ts

@@ -222,12 +222,13 @@ export const FieryFalloutEncounter: MysteryEncounter =
           ],
         })
         .withPreOptionPhase(async (scene: BattleScene) => {
+          // Do NOT await this, to prevent player from repeatedly pressing options
           transitionMysteryEncounterIntroVisuals(scene, false, false, 2000);
         })
         .withOptionPhase(async (scene: BattleScene) => {
           // Fire types help calm the Volcarona
           const encounter = scene.currentBattle.mysteryEncounter!;
-          transitionMysteryEncounterIntroVisuals(scene);
+          await transitionMysteryEncounterIntroVisuals(scene);
           setEncounterRewards(scene,
             { fillRemaining: true },
             undefined,

src/data/mystery-encounters/encounters/fight-or-flight-encounter.ts

@@ -145,7 +145,7 @@ export const FightOrFlightEncounter: MysteryEncounter =
     .withOption(
       MysteryEncounterOptionBuilder
         .newOptionWithMode(MysteryEncounterOptionMode.DISABLED_OR_SPECIAL)
-        .withPrimaryPokemonRequirement(new MoveRequirement(STEALING_MOVES)) // Will set option2PrimaryName and option2PrimaryMove dialogue tokens automatically
+        .withPrimaryPokemonRequirement(new MoveRequirement(STEALING_MOVES, true)) // Will set option2PrimaryName and option2PrimaryMove dialogue tokens automatically
         .withDialogue({
           buttonLabel: `${namespace}:option.2.label`,
           buttonTooltip: `${namespace}:option.2.tooltip`,

src/data/mystery-encounters/encounters/fun-and-games-encounter.ts

@@ -152,7 +152,7 @@ export const FunAndGamesEncounter: MysteryEncounter =
       },
       async (scene: BattleScene) => {
         // Leave encounter with no rewards or exp
-        transitionMysteryEncounterIntroVisuals(scene, true, true);
+        await transitionMysteryEncounterIntroVisuals(scene, true, true);
         leaveEncounterWithoutBattle(scene, true);
         return true;
       }

src/data/mystery-encounters/encounters/global-trade-system-encounter.ts

@@ -399,7 +399,7 @@ export const GlobalTradeSystemEncounter: MysteryEncounter =
           if (modifier.stackCount === 0) {
             scene.removeModifier(modifier);
           }
-          scene.updateModifiers(true, true);
+          await scene.updateModifiers(true, true);
 
           // Generate a trainer name
           const traderName = generateRandomTraderName();

src/data/mystery-encounters/encounters/lost-at-sea-encounter.ts

@@ -129,7 +129,7 @@ export const LostAtSeaEncounter: MysteryEncounter = MysteryEncounterBuilder.with
  *
  * @param scene Battle scene
  */
-async function handlePokemonGuidingYouPhase(scene: BattleScene) {
+function handlePokemonGuidingYouPhase(scene: BattleScene) {
   const laprasSpecies = getPokemonSpecies(Species.LAPRAS);
   const { mysteryEncounter } = scene.currentBattle;
 

src/data/mystery-encounters/encounters/mysterious-challengers-encounter.ts

@@ -147,11 +147,11 @@ export const MysteriousChallengersEncounter: MysteryEncounter =
         setEncounterRewards(scene, { guaranteedModifierTypeFuncs: [ modifierTypes.TM_COMMON, modifierTypes.TM_GREAT, modifierTypes.MEMORY_MUSHROOM ], fillRemaining: true });
 
         // Seed offsets to remove possibility of different trainers having exact same teams
-        let ret;
+        let initBattlePromise: Promise<void>;
         scene.executeWithSeedOffset(() => {
-          ret = initBattleWithEnemyConfig(scene, config);
+          initBattlePromise = initBattleWithEnemyConfig(scene, config);
         }, scene.currentBattle.waveIndex * 10);
-        return ret;
+        await initBattlePromise!;
       }
     )
     .withSimpleOption(
@@ -172,11 +172,11 @@ export const MysteriousChallengersEncounter: MysteryEncounter =
         setEncounterRewards(scene, { guaranteedModifierTiers: [ ModifierTier.ULTRA, ModifierTier.ULTRA, ModifierTier.GREAT, ModifierTier.GREAT ], fillRemaining: true });
 
         // Seed offsets to remove possibility of different trainers having exact same teams
-        let ret;
+        let initBattlePromise: Promise<void>;
         scene.executeWithSeedOffset(() => {
-          ret = initBattleWithEnemyConfig(scene, config);
+          initBattlePromise = initBattleWithEnemyConfig(scene, config);
         }, scene.currentBattle.waveIndex * 100);
-        return ret;
+        await initBattlePromise!;
       }
     )
     .withSimpleOption(
@@ -200,11 +200,11 @@ export const MysteriousChallengersEncounter: MysteryEncounter =
         setEncounterRewards(scene, { guaranteedModifierTiers: [ ModifierTier.ROGUE, ModifierTier.ROGUE, ModifierTier.ULTRA, ModifierTier.GREAT ], fillRemaining: true });
 
         // Seed offsets to remove possibility of different trainers having exact same teams
-        let ret;
+        let initBattlePromise: Promise<void>;
         scene.executeWithSeedOffset(() => {
-          ret = initBattleWithEnemyConfig(scene, config);
+          initBattlePromise = initBattleWithEnemyConfig(scene, config);
         }, scene.currentBattle.waveIndex * 1000);
-        return ret;
+        await initBattlePromise!;
       }
     )
     .withOutroDialogue([

src/data/mystery-encounters/encounters/mysterious-chest-encounter.ts

@@ -184,7 +184,7 @@ export const MysteriousChestEncounter: MysteryEncounter =
               scene.unshiftPhase(new GameOverPhase(scene));
             } else {
               // Show which Pokemon was KOed, then start battle against Gimmighoul
-              transitionMysteryEncounterIntroVisuals(scene, true, true, 500);
+              await transitionMysteryEncounterIntroVisuals(scene, true, true, 500);
               setEncounterRewards(scene, { fillRemaining: true });
               await initBattleWithEnemyConfig(scene, encounter.enemyPartyConfigs[0]);
             }

src/data/mystery-encounters/encounters/part-timer-encounter.ts

@@ -227,7 +227,7 @@ export const PartTimerEncounter: MysteryEncounter =
     .withOption(
       MysteryEncounterOptionBuilder
         .newOptionWithMode(MysteryEncounterOptionMode.DISABLED_OR_SPECIAL)
-        .withPrimaryPokemonRequirement(new MoveRequirement(CHARMING_MOVES)) // Will set option3PrimaryName and option3PrimaryMove dialogue tokens automatically
+        .withPrimaryPokemonRequirement(new MoveRequirement(CHARMING_MOVES, true)) // Will set option3PrimaryName and option3PrimaryMove dialogue tokens automatically
         .withDialogue({
           buttonLabel: `${namespace}:option.3.label`,
           buttonTooltip: `${namespace}:option.3.tooltip`,

src/data/mystery-encounters/encounters/safari-zone-encounter.ts

@@ -303,13 +303,16 @@ async function summonSafariPokemon(scene: BattleScene) {
   scene.unshiftPhase(new SummonPhase(scene, 0, false));
 
   encounter.setDialogueToken("pokemonName", getPokemonNameWithAffix(pokemon));
-  showEncounterText(scene, getEncounterText(scene, "battle:singleWildAppeared") ?? "", null, 1500, false)
+
-    .then(() => {
+  // TODO: If we await showEncounterText here, then the text will display without
+  // the wild Pokemon on screen, but if we don't await it, then the text never
+  // shows up and the IV scanner breaks. For now, we place the IV scanner code
+  // separately so that at least the IV scanner works.
+
   const ivScannerModifier = scene.findModifier(m => m instanceof IvScannerModifier);
   if (ivScannerModifier) {
     scene.pushPhase(new ScanIvsPhase(scene, pokemon.getBattlerIndex(), Math.min(ivScannerModifier.getStackCount() * 2, 6)));
   }
-    });
 }
 
 function throwPokeball(scene: BattleScene, pokemon: EnemyPokemon): Promise<boolean> {

src/data/mystery-encounters/encounters/shady-vitamin-dealer-encounter.ts

@@ -138,11 +138,11 @@ export const ShadyVitaminDealerEncounter: MysteryEncounter =
             newNature = randSeedInt(25) as Nature;
           }
 
-          chosenPokemon.nature = newNature;
+          chosenPokemon.customPokemonData.nature = newNature;
           encounter.setDialogueToken("newNature", getNatureName(newNature));
           queueEncounterMessage(scene, `${namespace}:cheap_side_effects`);
           setEncounterExp(scene, [ chosenPokemon.id ], 100);
-          chosenPokemon.updateInfo();
+          await chosenPokemon.updateInfo();
         })
         .build()
     )
@@ -204,7 +204,7 @@ export const ShadyVitaminDealerEncounter: MysteryEncounter =
           queueEncounterMessage(scene, `${namespace}:no_bad_effects`);
           setEncounterExp(scene, [ chosenPokemon.id ], 100);
 
-          chosenPokemon.updateInfo();
+          await chosenPokemon.updateInfo();
         })
         .build()
     )

src/data/mystery-encounters/encounters/slumbering-snorlax-encounter.ts

@@ -18,7 +18,7 @@ import { MysteryEncounterOptionMode } from "#enums/mystery-encounter-option-mode
 import { PartyHealPhase } from "#app/phases/party-heal-phase";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/game-mode";
 import { BerryType } from "#enums/berry-type";
-import { MysteryEncounterPokemonData } from "#app/data/mystery-encounters/mystery-encounter-pokemon-data";
+import { CustomPokemonData } from "#app/data/custom-pokemon-data";
 
 /** i18n namespace for the encounter */
 const namespace = "mysteryEncounters/slumberingSnorlax";
@@ -72,7 +72,7 @@ export const SlumberingSnorlaxEncounter: MysteryEncounter =
             stackCount: 2
           },
         ],
-        mysteryEncounterPokemonData: new MysteryEncounterPokemonData({ spriteScale: 1.25 }),
+        customPokemonData: new CustomPokemonData({ spriteScale: 1.25 }),
         aiType: AiType.SMART // Required to ensure Snorlax uses Sleep Talk while it is asleep
       };
       const config: EnemyPartyConfig = {
@@ -143,7 +143,7 @@ export const SlumberingSnorlaxEncounter: MysteryEncounter =
     .withOption(
       MysteryEncounterOptionBuilder
         .newOptionWithMode(MysteryEncounterOptionMode.DISABLED_OR_SPECIAL)
-        .withPrimaryPokemonRequirement(new MoveRequirement(STEALING_MOVES))
+        .withPrimaryPokemonRequirement(new MoveRequirement(STEALING_MOVES, true))
         .withDialogue({
           buttonLabel: `${namespace}:option.3.label`,
           buttonTooltip: `${namespace}:option.3.tooltip`,

src/data/mystery-encounters/encounters/teleporting-hijinks-encounter.ts

@@ -149,7 +149,7 @@ export const TeleportingHijinksEncounter: MysteryEncounter =
         const magnet = generateModifierTypeOption(scene, modifierTypes.ATTACK_TYPE_BOOSTER, [ Type.STEEL ])!;
         const metalCoat = generateModifierTypeOption(scene, modifierTypes.ATTACK_TYPE_BOOSTER, [ Type.ELECTRIC ])!;
         setEncounterRewards(scene, { guaranteedModifierTypeOptions: [ magnet, metalCoat ], fillRemaining: true });
-        transitionMysteryEncounterIntroVisuals(scene, true, true);
+        await transitionMysteryEncounterIntroVisuals(scene, true, true);
         await initBattleWithEnemyConfig(scene, config);
       }
     )

src/data/mystery-encounters/encounters/the-expert-pokemon-breeder-encounter.ts

@@ -25,6 +25,7 @@ import { achvs } from "#app/system/achv";
 import { modifierTypes, PokemonHeldItemModifierType } from "#app/modifier/modifier-type";
 import { Type } from "#app/data/type";
 import { getPokeballTintColor } from "#app/data/pokeball";
+import { PokemonHeldItemModifier } from "#app/modifier/modifier";
 
 /** the i18n namespace for the encounter */
 const namespace = "mysteryEncounters/theExpertPokemonBreeder";
@@ -61,7 +62,7 @@ const POOL_1_POKEMON: (Species | BreederSpeciesEvolution)[][] = [
 const POOL_2_POKEMON: (Species | BreederSpeciesEvolution)[][] = [
   [ Species.PICHU, new BreederSpeciesEvolution(Species.PIKACHU, FIRST_STAGE_EVOLUTION_WAVE), new BreederSpeciesEvolution(Species.RAICHU, FINAL_STAGE_EVOLUTION_WAVE) ],
   [ Species.PICHU, new BreederSpeciesEvolution(Species.PIKACHU, FIRST_STAGE_EVOLUTION_WAVE), new BreederSpeciesEvolution(Species.ALOLA_RAICHU, FINAL_STAGE_EVOLUTION_WAVE) ],
-  [ Species.JYNX ],
+  [ Species.SMOOCHUM, new BreederSpeciesEvolution(Species.JYNX, SECOND_STAGE_EVOLUTION_WAVE) ],
   [ Species.TYROGUE, new BreederSpeciesEvolution(Species.HITMONLEE, SECOND_STAGE_EVOLUTION_WAVE) ],
   [ Species.TYROGUE, new BreederSpeciesEvolution(Species.HITMONCHAN, SECOND_STAGE_EVOLUTION_WAVE) ],
   [ Species.TYROGUE, new BreederSpeciesEvolution(Species.HITMONTOP, SECOND_STAGE_EVOLUTION_WAVE) ],
@@ -163,7 +164,7 @@ export const TheExpertPokemonBreederEncounter: MysteryEncounter =
       if (pokemon2CommonEggs > 0) {
         const eggsText = i18next.t(`${namespace}:numEggs`, { count: pokemon2CommonEggs, rarity: i18next.t("egg:defaultTier") });
         pokemon2Tooltip += i18next.t(`${namespace}:eggs_tooltip`, { eggs: eggsText });
-        encounter.setDialogueToken("pokemon1CommonEggs", eggsText);
+        encounter.setDialogueToken("pokemon2CommonEggs", eggsText);
       }
       encounter.options[1].dialogue!.buttonTooltip = pokemon2Tooltip;
 
@@ -221,7 +222,7 @@ export const TheExpertPokemonBreederEncounter: MysteryEncounter =
           encounter.misc.chosenPokemon = pokemon1;
           encounter.setDialogueToken("chosenPokemon", pokemon1.getNameToRender());
           const eggOptions = getEggOptions(scene, pokemon1CommonEggs, pokemon1RareEggs);
-          setEncounterRewards(scene, { fillRemaining: true }, eggOptions);
+          setEncounterRewards(scene, { fillRemaining: true }, eggOptions, () => doPostEncounterCleanup(scene));
 
           // Remove all Pokemon from the party except the chosen Pokemon
           removePokemonFromPartyAndStoreHeldItems(scene, encounter, pokemon1);
@@ -245,10 +246,7 @@ export const TheExpertPokemonBreederEncounter: MysteryEncounter =
           }
 
           encounter.onGameOver = onGameOver;
-          initBattleWithEnemyConfig(scene, config);
+          await initBattleWithEnemyConfig(scene, config);
-        })
-        .withPostOptionPhase(async (scene: BattleScene) => {
-          await doPostEncounterCleanup(scene);
         })
         .build()
     )
@@ -273,7 +271,7 @@ export const TheExpertPokemonBreederEncounter: MysteryEncounter =
           encounter.misc.chosenPokemon = pokemon2;
           encounter.setDialogueToken("chosenPokemon", pokemon2.getNameToRender());
           const eggOptions = getEggOptions(scene, pokemon2CommonEggs, pokemon2RareEggs);
-          setEncounterRewards(scene, { fillRemaining: true }, eggOptions);
+          setEncounterRewards(scene, { fillRemaining: true }, eggOptions, () => doPostEncounterCleanup(scene));
 
           // Remove all Pokemon from the party except the chosen Pokemon
           removePokemonFromPartyAndStoreHeldItems(scene, encounter, pokemon2);
@@ -297,10 +295,7 @@ export const TheExpertPokemonBreederEncounter: MysteryEncounter =
           }
 
           encounter.onGameOver = onGameOver;
-          initBattleWithEnemyConfig(scene, config);
+          await initBattleWithEnemyConfig(scene, config);
-        })
-        .withPostOptionPhase(async (scene: BattleScene) => {
-          await doPostEncounterCleanup(scene);
         })
         .build()
     )
@@ -325,7 +320,7 @@ export const TheExpertPokemonBreederEncounter: MysteryEncounter =
           encounter.misc.chosenPokemon = pokemon3;
           encounter.setDialogueToken("chosenPokemon", pokemon3.getNameToRender());
           const eggOptions = getEggOptions(scene, pokemon3CommonEggs, pokemon3RareEggs);
-          setEncounterRewards(scene, { fillRemaining: true }, eggOptions);
+          setEncounterRewards(scene, { fillRemaining: true }, eggOptions, () => doPostEncounterCleanup(scene));
 
           // Remove all Pokemon from the party except the chosen Pokemon
           removePokemonFromPartyAndStoreHeldItems(scene, encounter, pokemon3);
@@ -349,10 +344,7 @@ export const TheExpertPokemonBreederEncounter: MysteryEncounter =
           }
 
           encounter.onGameOver = onGameOver;
-          initBattleWithEnemyConfig(scene, config);
+          await initBattleWithEnemyConfig(scene, config);
-        })
-        .withPostOptionPhase(async (scene: BattleScene) => {
-          await doPostEncounterCleanup(scene);
         })
         .build()
     )
@@ -521,19 +513,19 @@ function checkAchievement(scene: BattleScene) {
   }
 }
 
-async function restorePartyAndHeldItems(scene: BattleScene) {
+function restorePartyAndHeldItems(scene: BattleScene) {
   const encounter = scene.currentBattle.mysteryEncounter!;
   // Restore original party
   scene.getParty().push(...encounter.misc.originalParty);
 
   // Restore held items
   const originalHeldItems = encounter.misc.originalPartyHeldItems;
-  originalHeldItems.forEach(pokemonHeldItemsList => {
+  originalHeldItems.forEach((pokemonHeldItemsList: PokemonHeldItemModifier[]) => {
     pokemonHeldItemsList.forEach(heldItem => {
       scene.addModifier(heldItem, true, false, false, true);
     });
   });
-  await scene.updateModifiers(true);
+  scene.updateModifiers(true);
 }
 
 function onGameOver(scene: BattleScene) {
@@ -609,13 +601,13 @@ function onGameOver(scene: BattleScene) {
   return false;
 }
 
-async function doPostEncounterCleanup(scene: BattleScene) {
+function doPostEncounterCleanup(scene: BattleScene) {
   const encounter = scene.currentBattle.mysteryEncounter!;
   if (!encounter.misc.encounterFailed) {
     // Give achievement if in Space biome
     checkAchievement(scene);
     // Give 20 friendship to the chosen pokemon
     encounter.misc.chosenPokemon.addFriendship(FRIENDSHIP_ADDED);
-    await restorePartyAndHeldItems(scene);
+    restorePartyAndHeldItems(scene);
   }
 }

src/data/mystery-encounters/encounters/the-strong-stuff-encounter.ts

@@ -14,7 +14,7 @@ import { BattlerIndex } from "#app/battle";
 import { BattlerTagType } from "#enums/battler-tag-type";
 import { BerryType } from "#enums/berry-type";
 import { MysteryEncounterTier } from "#enums/mystery-encounter-tier";
-import { MysteryEncounterPokemonData } from "#app/data/mystery-encounters/mystery-encounter-pokemon-data";
+import { CustomPokemonData } from "#app/data/custom-pokemon-data";
 import { Stat } from "#enums/stat";
 import { StatStageChangePhase } from "#app/phases/stat-stage-change-phase";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/game-mode";
@@ -79,7 +79,7 @@ export const TheStrongStuffEncounter: MysteryEncounter =
             species: getPokemonSpecies(Species.SHUCKLE),
             isBoss: true,
             bossSegments: 5,
-            mysteryEncounterPokemonData: new MysteryEncounterPokemonData({ spriteScale: 1.25 }),
+            customPokemonData: new CustomPokemonData({ spriteScale: 1.25 }),
             nature: Nature.BOLD,
             moveSet: [ Moves.INFESTATION, Moves.SALT_CURE, Moves.GASTRO_ACID, Moves.HEAL_ORDER ],
             modifierConfigs: [
@@ -201,7 +201,7 @@ export const TheStrongStuffEncounter: MysteryEncounter =
           });
 
         encounter.dialogue.outro = [];
-        transitionMysteryEncounterIntroVisuals(scene, true, true, 500);
+        await transitionMysteryEncounterIntroVisuals(scene, true, true, 500);
         await initBattleWithEnemyConfig(scene, encounter.enemyPartyConfigs[0]);
       }
     )

src/data/mystery-encounters/encounters/the-winstrate-challenge-encounter.ts

@@ -111,8 +111,8 @@ export const TheWinstrateChallengeEncounter: MysteryEncounter =
       },
       async (scene: BattleScene) => {
         // Spawn 5 trainer battles back to back with Macho Brace in rewards
-        scene.currentBattle.mysteryEncounter!.doContinueEncounter = (scene: BattleScene) => {
+        scene.currentBattle.mysteryEncounter!.doContinueEncounter = async (scene: BattleScene) => {
-          return endTrainerBattleAndShowDialogue(scene);
+          await endTrainerBattleAndShowDialogue(scene);
         };
         await transitionMysteryEncounterIntroVisuals(scene, true, false);
         await spawnNextTrainerOrEndEncounter(scene);

src/data/mystery-encounters/encounters/training-session-encounter.ts

@@ -162,7 +162,7 @@ export const TrainingSessionEncounter: MysteryEncounter =
 
           setEncounterRewards(scene, { fillRemaining: true }, undefined, onBeforeRewardsPhase);
 
-          return initBattleWithEnemyConfig(scene, config);
+          await initBattleWithEnemyConfig(scene, config);
         })
         .build()
     )
@@ -238,7 +238,7 @@ export const TrainingSessionEncounter: MysteryEncounter =
 
           setEncounterRewards(scene, { fillRemaining: true }, undefined, onBeforeRewardsPhase);
 
-          return initBattleWithEnemyConfig(scene, config);
+          await initBattleWithEnemyConfig(scene, config);
         })
         .build()
     )
@@ -351,7 +351,7 @@ export const TrainingSessionEncounter: MysteryEncounter =
 
           setEncounterRewards(scene, { fillRemaining: true }, undefined, onBeforeRewardsPhase);
 
-          return initBattleWithEnemyConfig(scene, config);
+          await initBattleWithEnemyConfig(scene, config);
         })
         .build()
     )

src/data/mystery-encounters/encounters/trash-to-treasure-encounter.ts

@@ -105,7 +105,7 @@ export const TrashToTreasureEncounter: MysteryEncounter =
         })
         .withOptionPhase(async (scene: BattleScene) => {
           // Gain 2 Leftovers and 2 Shell Bell
-          transitionMysteryEncounterIntroVisuals(scene);
+          await transitionMysteryEncounterIntroVisuals(scene);
           await tryApplyDigRewardItems(scene);
 
           const blackSludge = generateModifierType(scene, modifierTypes.MYSTERY_ENCOUNTER_BLACK_SLUDGE, [ SHOP_ITEM_COST_MULTIPLIER ]);
@@ -136,7 +136,7 @@ export const TrashToTreasureEncounter: MysteryEncounter =
           // Investigate garbage, battle Gmax Garbodor
           scene.setFieldScale(0.75);
           await showEncounterText(scene, `${namespace}:option.2.selected_2`);
-          transitionMysteryEncounterIntroVisuals(scene);
+          await transitionMysteryEncounterIntroVisuals(scene);
 
           const encounter = scene.currentBattle.mysteryEncounter!;
 
@@ -222,7 +222,7 @@ async function tryApplyDigRewardItems(scene: BattleScene) {
   await showEncounterText(scene, i18next.t("battle:rewardGainCount", { modifierName: shellBell.name, count: 2 }), null, undefined, true);
 }
 
-async function doGarbageDig(scene: BattleScene) {
+function doGarbageDig(scene: BattleScene) {
   scene.playSound("battle_anims/PRSFX- Dig2");
   scene.time.delayedCall(SOUND_EFFECT_WAIT_TIME, () => {
     scene.playSound("battle_anims/PRSFX- Dig2");

src/data/mystery-encounters/encounters/uncommon-breed-encounter.ts

@@ -210,7 +210,7 @@ export const UncommonBreedEncounter: MysteryEncounter =
     .withOption(
       MysteryEncounterOptionBuilder
         .newOptionWithMode(MysteryEncounterOptionMode.DISABLED_OR_SPECIAL)
-        .withPrimaryPokemonRequirement(new MoveRequirement(CHARMING_MOVES)) // Will set option2PrimaryName and option2PrimaryMove dialogue tokens automatically
+        .withPrimaryPokemonRequirement(new MoveRequirement(CHARMING_MOVES, true)) // Will set option2PrimaryName and option2PrimaryMove dialogue tokens automatically
         .withDialogue({
           buttonLabel: `${namespace}:option.3.label`,
           buttonTooltip: `${namespace}:option.3.tooltip`,

src/data/mystery-encounters/encounters/weird-dream-encounter.ts

@@ -12,7 +12,7 @@ import { IntegerHolder, isNullOrUndefined, randSeedInt, randSeedShuffle } from "
 import PokemonSpecies, { allSpecies, getPokemonSpecies } from "#app/data/pokemon-species";
 import { HiddenAbilityRateBoosterModifier, PokemonFormChangeItemModifier, PokemonHeldItemModifier } from "#app/modifier/modifier";
 import { achvs } from "#app/system/achv";
-import { MysteryEncounterPokemonData } from "#app/data/mystery-encounters/mystery-encounter-pokemon-data";
+import { CustomPokemonData } from "#app/data/custom-pokemon-data";
 import { showEncounterText } from "#app/data/mystery-encounters/utils/encounter-dialogue-utils";
 import { modifierTypes } from "#app/modifier/modifier-type";
 import i18next from "#app/plugins/i18n";
@@ -379,10 +379,10 @@ async function doNewTeamPostProcess(scene: BattleScene, transformations: Pokemon
       newType = randSeedInt(18) as Type;
     }
     newTypes.push(newType);
-    if (!newPokemon.mysteryEncounterPokemonData) {
+    if (!newPokemon.customPokemonData) {
-      newPokemon.mysteryEncounterPokemonData = new MysteryEncounterPokemonData();
+      newPokemon.customPokemonData = new CustomPokemonData();
     }
-    newPokemon.mysteryEncounterPokemonData.types = newTypes;
+    newPokemon.customPokemonData.types = newTypes;
 
     for (const item of transformation.heldItems) {
       item.pokemonId = newPokemon.id;

src/data/mystery-encounters/mystery-encounter-requirements.ts

@@ -15,6 +15,7 @@ import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { AttackTypeBoosterModifier } from "#app/modifier/modifier";
 import { AttackTypeBoosterModifierType } from "#app/modifier/modifier-type";
 import { SpeciesFormKey } from "#enums/species-form-key";
+import { allAbilities } from "#app/data/ability";
 
 export interface EncounterRequirement {
   meetsRequirement(scene: BattleScene): boolean; // Boolean to see if a requirement is met
@@ -476,9 +477,11 @@ export class MoveRequirement extends EncounterPokemonRequirement {
   requiredMoves: Moves[] = [];
   minNumberOfPokemon: number;
   invertQuery: boolean;
+  excludeDisallowedPokemon: boolean;
 
-  constructor(moves: Moves | Moves[], minNumberOfPokemon: number = 1, invertQuery: boolean = false) {
+  constructor(moves: Moves | Moves[], excludeDisallowedPokemon: boolean, minNumberOfPokemon: number = 1, invertQuery: boolean = false) {
     super();
+    this.excludeDisallowedPokemon = excludeDisallowedPokemon;
     this.minNumberOfPokemon = minNumberOfPokemon;
     this.invertQuery = invertQuery;
     this.requiredMoves = Array.isArray(moves) ? moves : [ moves ];
@@ -494,10 +497,15 @@ export class MoveRequirement extends EncounterPokemonRequirement {
 
   override queryParty(partyPokemon: PlayerPokemon[]): PlayerPokemon[] {
     if (!this.invertQuery) {
-      return partyPokemon.filter((pokemon) => this.requiredMoves.filter((reqMove) => pokemon.moveset.filter((move) => move?.moveId === reqMove).length > 0).length > 0);
+      // get the Pokemon with at least one move in the required moves list
+      return partyPokemon.filter((pokemon) =>
+        (!this.excludeDisallowedPokemon || pokemon.isAllowedInBattle())
+        && pokemon.moveset.some((move) => move?.moveId && this.requiredMoves.includes(move.moveId)));
     } else {
       // for an inverted query, we only want to get the pokemon that don't have ANY of the listed moves
-      return partyPokemon.filter((pokemon) => this.requiredMoves.filter((reqMove) => pokemon.moveset.filter((move) => move?.moveId === reqMove).length === 0).length === 0);
+      return partyPokemon.filter((pokemon) =>
+        (!this.excludeDisallowedPokemon || pokemon.isAllowedInBattle())
+        && !pokemon.moveset.some((move) => move?.moveId && this.requiredMoves.includes(move.moveId)));
     }
   }
 
@@ -559,9 +567,11 @@ export class AbilityRequirement extends EncounterPokemonRequirement {
   requiredAbilities: Abilities[];
   minNumberOfPokemon: number;
   invertQuery: boolean;
+  excludeDisallowedPokemon: boolean;
 
-  constructor(abilities: Abilities | Abilities[], minNumberOfPokemon: number = 1, invertQuery: boolean = false) {
+  constructor(abilities: Abilities | Abilities[], excludeDisallowedPokemon: boolean, minNumberOfPokemon: number = 1, invertQuery: boolean = false) {
     super();
+    this.excludeDisallowedPokemon = excludeDisallowedPokemon;
     this.minNumberOfPokemon = minNumberOfPokemon;
     this.invertQuery = invertQuery;
     this.requiredAbilities = Array.isArray(abilities) ? abilities : [ abilities ];
@@ -577,16 +587,21 @@ export class AbilityRequirement extends EncounterPokemonRequirement {
 
   override queryParty(partyPokemon: PlayerPokemon[]): PlayerPokemon[] {
     if (!this.invertQuery) {
-      return partyPokemon.filter((pokemon) => this.requiredAbilities.some((ability) => pokemon.getAbility().id === ability));
+      return partyPokemon.filter((pokemon) =>
+        (!this.excludeDisallowedPokemon || pokemon.isAllowedInBattle())
+        && this.requiredAbilities.some((ability) => pokemon.hasAbility(ability, false)));
     } else {
-      // for an inverted query, we only want to get the pokemon that don't have ANY of the listed abilitiess
+      // for an inverted query, we only want to get the pokemon that don't have ANY of the listed abilities
-      return partyPokemon.filter((pokemon) => this.requiredAbilities.filter((ability) => pokemon.getAbility().id === ability).length === 0);
+      return partyPokemon.filter((pokemon) =>
+        (!this.excludeDisallowedPokemon || pokemon.isAllowedInBattle())
+        && this.requiredAbilities.filter((ability) => pokemon.hasAbility(ability, false)).length === 0);
     }
   }
 
-  override getDialogueToken(scene: BattleScene, pokemon?: PlayerPokemon): [string, string] {
+  override getDialogueToken(_scene: BattleScene, pokemon?: PlayerPokemon): [string, string] {
-    if (pokemon?.getAbility().id && this.requiredAbilities.some(a => pokemon.getAbility().id === a)) {
+    const matchingAbility = this.requiredAbilities.find(a => pokemon?.hasAbility(a, false));
-      return [ "ability", pokemon.getAbility().name ];
+    if (!isNullOrUndefined(matchingAbility)) {
+      return [ "ability", allAbilities[matchingAbility].name ];
     }
     return [ "ability", "" ];
   }

src/data/mystery-encounters/mystery-encounter.ts

@@ -325,7 +325,7 @@ export default class MysteryEncounter implements IMysteryEncounter {
       if (activeMon.length > 0) {
         this.primaryPokemon = activeMon[0];
       } else {
-        this.primaryPokemon = scene.getParty().filter(p => !p.isFainted())[0];
+        this.primaryPokemon = scene.getParty().filter(p => p.isAllowedInBattle())[0];
       }
       return true;
     }

src/data/mystery-encounters/utils/encounter-phase-utils.ts

@@ -27,7 +27,7 @@ import { Status, StatusEffect } from "#app/data/status-effect";
 import { TrainerConfig, trainerConfigs, TrainerSlot } from "#app/data/trainer-config";
 import PokemonSpecies from "#app/data/pokemon-species";
 import { Egg, IEggOptions } from "#app/data/egg";
-import { MysteryEncounterPokemonData } from "#app/data/mystery-encounters/mystery-encounter-pokemon-data";
+import { CustomPokemonData } from "#app/data/custom-pokemon-data";
 import HeldModifierConfig from "#app/interfaces/held-modifier-config";
 import { MovePhase } from "#app/phases/move-phase";
 import { EggLapsePhase } from "#app/phases/egg-lapse-phase";
@@ -71,7 +71,7 @@ export interface EnemyPokemonConfig {
   nickname?: string;
   bossSegments?: number;
   bossSegmentModifier?: number; // Additive to the determined segment number
-  mysteryEncounterPokemonData?: MysteryEncounterPokemonData;
+  customPokemonData?: CustomPokemonData;
   formIndex?: number;
   abilityIndex?: number;
   level?: number;
@@ -145,7 +145,7 @@ export async function initBattleWithEnemyConfig(scene: BattleScene, partyConfig:
     newTrainer.setVisible(false);
     scene.field.add(newTrainer);
     scene.currentBattle.trainer = newTrainer;
-    loadEnemyAssets.push(newTrainer.loadAssets());
+    loadEnemyAssets.push(newTrainer.loadAssets().then(() => newTrainer.initSprite()));
 
     battle.enemyLevels = scene.currentBattle.trainer.getPartyLevels(scene.currentBattle.waveIndex);
   } else {
@@ -250,8 +250,8 @@ export async function initBattleWithEnemyConfig(scene: BattleScene, partyConfig:
       }
 
       // Set custom mystery encounter data fields (such as sprite scale, custom abilities, types, etc.)
-      if (!isNullOrUndefined(config.mysteryEncounterPokemonData)) {
+      if (!isNullOrUndefined(config.customPokemonData)) {
-        enemyPokemon.mysteryEncounterPokemonData = config.mysteryEncounterPokemonData;
+        enemyPokemon.customPokemonData = config.customPokemonData;
       }
 
       // Set Boss

src/data/pokemon-forms.ts

@@ -799,8 +799,8 @@ export const pokemonFormChanges: PokemonFormChanges = {
   [Species.ZYGARDE]: [
     new SpeciesFormChange(Species.ZYGARDE, "50-pc", "complete", new SpeciesFormChangeManualTrigger(), true),
     new SpeciesFormChange(Species.ZYGARDE, "complete", "50-pc", new SpeciesFormChangeManualTrigger(), true),
-    new SpeciesFormChange(Species.ZYGARDE, "10-pc", "complete", new SpeciesFormChangeManualTrigger(), true),
+    new SpeciesFormChange(Species.ZYGARDE, "10-pc", "10-complete", new SpeciesFormChangeManualTrigger(), true),
-    new SpeciesFormChange(Species.ZYGARDE, "complete", "10-pc", new SpeciesFormChangeManualTrigger(), true)
+    new SpeciesFormChange(Species.ZYGARDE, "10-complete", "10-pc", new SpeciesFormChangeManualTrigger(), true)
   ],
   [Species.DIANCIE]: [
     new SpeciesFormChange(Species.DIANCIE, "", SpeciesFormKey.MEGA, new SpeciesFormChangeItemTrigger(FormChangeItem.DIANCITE))

src/data/pokemon-species.ts

@@ -425,6 +425,7 @@ export abstract class PokemonSpeciesForm {
         case "hero":
         case "roaming":
         case "complete":
+        case "10-complete":
         case "10":
         case "10-pc":
         case "super":
@@ -2135,7 +2136,8 @@ export function initSpecies() {
       new PokemonForm("10% Forme", "10", Type.DRAGON, Type.GROUND, 1.2, 33.5, Abilities.AURA_BREAK, Abilities.NONE, Abilities.NONE, 486, 54, 100, 71, 61, 85, 115, 3, 0, 300, false, null, true),
       new PokemonForm("50% Forme Power Construct", "50-pc", Type.DRAGON, Type.GROUND, 5, 305, Abilities.POWER_CONSTRUCT, Abilities.NONE, Abilities.NONE, 600, 108, 100, 121, 81, 95, 95, 3, 0, 300, false, "", true),
       new PokemonForm("10% Forme Power Construct", "10-pc", Type.DRAGON, Type.GROUND, 1.2, 33.5, Abilities.POWER_CONSTRUCT, Abilities.NONE, Abilities.NONE, 486, 54, 100, 71, 61, 85, 115, 3, 0, 300, false, "10", true),
-      new PokemonForm("Complete Forme", "complete", Type.DRAGON, Type.GROUND, 4.5, 610, Abilities.POWER_CONSTRUCT, Abilities.NONE, Abilities.NONE, 708, 216, 100, 121, 91, 95, 85, 3, 0, 300),
+      new PokemonForm("Complete Forme (50% PC)", "complete", Type.DRAGON, Type.GROUND, 4.5, 610, Abilities.POWER_CONSTRUCT, Abilities.NONE, Abilities.NONE, 708, 216, 100, 121, 91, 95, 85, 3, 0, 300),
+      new PokemonForm("Complete Forme (10% PC)", "10-complete", Type.DRAGON, Type.GROUND, 4.5, 610, Abilities.POWER_CONSTRUCT, Abilities.NONE, Abilities.NONE, 708, 216, 100, 121, 91, 95, 85, 3, 0, 300, false, "complete"),
     ),
     new PokemonSpecies(Species.DIANCIE, 6, false, false, true, "Jewel Pokémon", Type.ROCK, Type.FAIRY, 0.7, 8.8, Abilities.CLEAR_BODY, Abilities.NONE, Abilities.NONE, 600, 50, 100, 150, 100, 150, 50, 3, 50, 300, GrowthRate.SLOW, null, false, true,
       new PokemonForm("Normal", "", Type.ROCK, Type.FAIRY, 0.7, 8.8, Abilities.CLEAR_BODY, Abilities.NONE, Abilities.NONE, 600, 50, 100, 150, 100, 150, 50, 3, 50, 300, false, null, true),

src/data/status-effect.ts

@@ -1,4 +1,4 @@
-import * as Utils from "../utils";
+import { randIntRange } from "#app/utils";
 import { StatusEffect } from "#enums/status-effect";
 import i18next, { ParseKeys } from "i18next";
 
@@ -6,17 +6,21 @@ export { StatusEffect };
 
 export class Status {
   public effect: StatusEffect;
-  public turnCount: integer;
+  /** Toxic damage is `1/16 max HP * toxicTurnCount` */
-  public cureTurn: integer | null;
+  public toxicTurnCount: number = 0;
+  public sleepTurnsRemaining?: number;
 
-  constructor(effect: StatusEffect, turnCount: integer = 0, cureTurn?: integer) {
+  constructor(effect: StatusEffect, toxicTurnCount: number = 0, sleepTurnsRemaining?: number) {
     this.effect = effect;
-    this.turnCount = turnCount === undefined ? 0 : turnCount;
+    this.toxicTurnCount = toxicTurnCount;
-    this.cureTurn = cureTurn!; // TODO: is this bang correct?
+    this.sleepTurnsRemaining = sleepTurnsRemaining;
   }
 
   incrementTurn(): void {
-    this.turnCount++;
+    this.toxicTurnCount++;
+    if (this.sleepTurnsRemaining) {
+      this.sleepTurnsRemaining--;
+    }
   }
 
   isPostTurn(): boolean {
@@ -107,7 +111,7 @@ export function getStatusEffectCatchRateMultiplier(statusEffect: StatusEffect):
 * Returns a random non-volatile StatusEffect
 */
 export function generateRandomStatusEffect(): StatusEffect {
-  return Utils.randIntRange(1, 6);
+  return randIntRange(1, 6);
 }
 
 /**
@@ -123,7 +127,7 @@ export function getRandomStatusEffect(statusEffectA: StatusEffect, statusEffectB
     return statusEffectA;
   }
 
-  return Utils.randIntRange(0, 2) ? statusEffectA : statusEffectB;
+  return randIntRange(0, 2) ? statusEffectA : statusEffectB;
 }
 
 /**
@@ -140,7 +144,7 @@ export function getRandomStatus(statusA: Status | null, statusB: Status | null):
   }
 
 
-  return Utils.randIntRange(0, 2) ? statusA : statusB;
+  return randIntRange(0, 2) ? statusA : statusB;
 }
 
 /**

src/data/trainer-config.ts

@@ -574,13 +574,13 @@ export class TrainerConfig {
       case "magma": {
         return {
           [TrainerPoolTier.COMMON]: [ Species.GROWLITHE, Species.SLUGMA, Species.SOLROCK, Species.HIPPOPOTAS, Species.BALTOY, Species.ROLYCOLY, Species.GLIGAR, Species.TORKOAL, Species.HOUNDOUR, Species.MAGBY ],
-        [TrainerPoolTier.UNCOMMON]: [ Species.TRAPINCH, Species.SILICOBRA, Species.RHYHORN, Species.ANORITH, Species.LILEEP, Species.HISUI_GROWLITHE, Species.TURTONATOR, Species.ARON, Species.BARBOACH ],
+          [TrainerPoolTier.UNCOMMON]: [ Species.TRAPINCH, Species.SILICOBRA, Species.RHYHORN, Species.ANORITH, Species.LILEEP, Species.HISUI_GROWLITHE, Species.TURTONATOR, Species.ARON, Species.TOEDSCOOL ],
           [TrainerPoolTier.RARE]: [ Species.CAPSAKID, Species.CHARCADET ]
         };
       }
       case "aqua": {
         return {
-        [TrainerPoolTier.COMMON]: [ Species.CORPHISH, Species.SPHEAL, Species.CLAMPERL, Species.CHINCHOU, Species.WOOPER, Species.WINGULL, Species.TENTACOOL, Species.AZURILL, Species.LOTAD, Species.WAILMER, Species.REMORAID ],
+          [TrainerPoolTier.COMMON]: [ Species.CORPHISH, Species.SPHEAL, Species.CLAMPERL, Species.CHINCHOU, Species.WOOPER, Species.WINGULL, Species.TENTACOOL, Species.AZURILL, Species.LOTAD, Species.WAILMER, Species.REMORAID, Species.BARBOACH ],
           [TrainerPoolTier.UNCOMMON]: [ Species.MANTYKE, Species.HISUI_QWILFISH, Species.ARROKUDA, Species.DHELMISE, Species.CLOBBOPUS, Species.FEEBAS, Species.PALDEA_WOOPER, Species.HORSEA, Species.SKRELP ],
           [TrainerPoolTier.RARE]: [ Species.DONDOZO, Species.BASCULEGION ]
         };
@@ -601,9 +601,9 @@ export class TrainerConfig {
       }
       case "flare": {
         return {
-        [TrainerPoolTier.COMMON]: [ Species.FLETCHLING, Species.LITLEO, Species.INKAY, Species.HELIOPTILE, Species.ELECTRIKE, Species.SKORUPI, Species.PURRLOIN, Species.CLAWITZER, Species.PANCHAM, Species.ESPURR, Species.BUNNELBY ],
+          [TrainerPoolTier.COMMON]: [ Species.FLETCHLING, Species.LITLEO, Species.INKAY, Species.FOONGUS, Species.HELIOPTILE, Species.ELECTRIKE, Species.SKORUPI, Species.PURRLOIN, Species.CLAWITZER, Species.PANCHAM, Species.ESPURR, Species.BUNNELBY ],
           [TrainerPoolTier.UNCOMMON]: [ Species.LITWICK, Species.SNEASEL, Species.PUMPKABOO, Species.PHANTUMP, Species.HONEDGE, Species.BINACLE, Species.HOUNDOUR, Species.SKRELP, Species.SLIGGOO ],
-        [TrainerPoolTier.RARE]: [ Species.NOIVERN, Species.HISUI_AVALUGG, Species.HISUI_SLIGGOO ]
+          [TrainerPoolTier.RARE]: [ Species.NOIBAT, Species.HISUI_AVALUGG, Species.HISUI_SLIGGOO ]
         };
       }
       case "aether": {
@@ -1504,7 +1504,7 @@ export const trainerConfigs: TrainerConfigs = {
     .setSpeciesPools({
       [TrainerPoolTier.COMMON]: [ Species.SLUGMA, Species.POOCHYENA, Species.NUMEL, Species.ZIGZAGOON, Species.DIGLETT, Species.MAGBY, Species.TORKOAL, Species.GROWLITHE, Species.BALTOY ],
       [TrainerPoolTier.UNCOMMON]: [ Species.SOLROCK, Species.HIPPOPOTAS, Species.SANDACONDA, Species.PHANPY, Species.ROLYCOLY, Species.GLIGAR, Species.RHYHORN, Species.HEATMOR ],
-      [TrainerPoolTier.RARE]: [ Species.TRAPINCH, Species.LILEEP, Species.ANORITH, Species.HISUI_GROWLITHE, Species.TURTONATOR, Species.ARON ],
+      [TrainerPoolTier.RARE]: [ Species.TRAPINCH, Species.LILEEP, Species.ANORITH, Species.HISUI_GROWLITHE, Species.TURTONATOR, Species.ARON, Species.TOEDSCOOL ],
       [TrainerPoolTier.SUPER_RARE]: [ Species.CAPSAKID, Species.CHARCADET ]
     }),
   [TrainerType.TABITHA]: new TrainerConfig(++t).setMoneyMultiplier(1.5).initForEvilTeamAdmin("magma_admin", "magma", [ Species.CAMERUPT ]).setEncounterBgm(TrainerType.PLASMA_GRUNT).setBattleBgm("battle_plasma_grunt").setMixedBattleBgm("battle_aqua_magma_grunt").setVictoryBgm("victory_team_plasma").setPartyTemplateFunc(scene => getEvilGruntPartyTemplate(scene)),
@@ -1540,9 +1540,9 @@ export const trainerConfigs: TrainerConfigs = {
   [TrainerType.FLARE_GRUNT]: new TrainerConfig(++t).setHasGenders("Flare Grunt Female").setHasDouble("Flare Grunts").setMoneyMultiplier(1.0).setEncounterBgm(TrainerType.PLASMA_GRUNT).setBattleBgm("battle_plasma_grunt").setMixedBattleBgm("battle_flare_grunt").setVictoryBgm("victory_team_plasma").setPartyTemplateFunc(scene => getEvilGruntPartyTemplate(scene))
     .setSpeciesPools({
       [TrainerPoolTier.COMMON]: [ Species.FLETCHLING, Species.LITLEO, Species.PONYTA, Species.INKAY, Species.HOUNDOUR, Species.SKORUPI, Species.SCRAFTY, Species.CROAGUNK, Species.SCATTERBUG, Species.ESPURR ],
-      [TrainerPoolTier.UNCOMMON]: [ Species.HELIOPTILE, Species.ELECTRIKE, Species.SKRELP, Species.PANCHAM, Species.PURRLOIN, Species.POOCHYENA, Species.BINACLE, Species.CLAUNCHER, Species.PUMPKABOO, Species.PHANTUMP ],
+      [TrainerPoolTier.UNCOMMON]: [ Species.HELIOPTILE, Species.ELECTRIKE, Species.SKRELP, Species.PANCHAM, Species.PURRLOIN, Species.POOCHYENA, Species.BINACLE, Species.CLAUNCHER, Species.PUMPKABOO, Species.PHANTUMP, Species.FOONGUS ],
       [TrainerPoolTier.RARE]: [ Species.LITWICK, Species.SNEASEL, Species.PAWNIARD, Species.SLIGGOO ],
-      [TrainerPoolTier.SUPER_RARE]: [ Species.NOIVERN, Species.HISUI_SLIGGOO, Species.HISUI_AVALUGG ]
+      [TrainerPoolTier.SUPER_RARE]: [ Species.NOIBAT, Species.HISUI_SLIGGOO, Species.HISUI_AVALUGG ]
     }),
   [TrainerType.BRYONY]: new TrainerConfig(++t).setMoneyMultiplier(1.5).initForEvilTeamAdmin("flare_admin_female", "flare", [ Species.LIEPARD ]).setEncounterBgm(TrainerType.PLASMA_GRUNT).setBattleBgm("battle_plasma_grunt").setMixedBattleBgm("battle_flare_grunt").setVictoryBgm("victory_team_plasma").setPartyTemplateFunc(scene => getEvilGruntPartyTemplate(scene)),
   [TrainerType.XEROSIC]: new TrainerConfig(++t).setMoneyMultiplier(1.5).initForEvilTeamAdmin("flare_admin", "flare", [ Species.MALAMAR ]).setEncounterBgm(TrainerType.PLASMA_GRUNT).setBattleBgm("battle_plasma_grunt").setMixedBattleBgm("battle_flare_grunt").setVictoryBgm("victory_team_plasma").setPartyTemplateFunc(scene => getEvilGruntPartyTemplate(scene)),
@@ -1893,7 +1893,10 @@ export const trainerConfigs: TrainerConfigs = {
     }),
 
   [TrainerType.ROCKET_BOSS_GIOVANNI_1]: new TrainerConfig(t = TrainerType.ROCKET_BOSS_GIOVANNI_1).setName("Giovanni").initForEvilTeamLeader("Rocket Boss", []).setMixedBattleBgm("battle_rocket_boss").setVictoryBgm("victory_team_plasma")
-    .setPartyMemberFunc(0, getRandomPartyMemberFunc([ Species.PERSIAN, Species.ALOLA_PERSIAN ]))
+    .setPartyMemberFunc(0, getRandomPartyMemberFunc([ Species.PERSIAN, Species.ALOLA_PERSIAN ], TrainerSlot.TRAINER, true, p => {
+      p.generateAndPopulateMoveset();
+      p.gender = Gender.MALE;
+    }))
     .setPartyMemberFunc(1, getRandomPartyMemberFunc([ Species.DUGTRIO, Species.ALOLA_DUGTRIO ]))
     .setPartyMemberFunc(2, getRandomPartyMemberFunc([ Species.HONCHKROW ]))
     .setPartyMemberFunc(3, getRandomPartyMemberFunc([ Species.NIDOKING, Species.NIDOQUEEN ]))
@@ -1945,6 +1948,7 @@ export const trainerConfigs: TrainerConfigs = {
       p.pokeball = PokeballType.ULTRA_BALL;
       p.formIndex = 1; // Mega Camerupt
       p.generateName();
+      p.gender = Gender.MALE;
     })),
   [TrainerType.MAXIE_2]: new TrainerConfig(++t).setName("Maxie").initForEvilTeamLeader("Magma Boss", [], true).setMixedBattleBgm("battle_aqua_magma_boss").setVictoryBgm("victory_team_plasma")
     .setPartyMemberFunc(0, getRandomPartyMemberFunc([ Species.SOLROCK, Species.TYPHLOSION ], TrainerSlot.TRAINER, true, p => {
@@ -1967,6 +1971,7 @@ export const trainerConfigs: TrainerConfigs = {
       p.pokeball = PokeballType.ULTRA_BALL;
       p.formIndex = 1; // Mega Camerupt
       p.generateName();
+      p.gender = Gender.MALE;
     }))
     .setPartyMemberFunc(5, getRandomPartyMemberFunc([ Species.GROUDON ], TrainerSlot.TRAINER, true, p => {
       p.setBoss(true, 2);
@@ -1985,6 +1990,7 @@ export const trainerConfigs: TrainerConfigs = {
       p.pokeball = PokeballType.ULTRA_BALL;
       p.formIndex = 1; // Mega Sharpedo
       p.generateName();
+      p.gender = Gender.MALE;
     })),
   [TrainerType.ARCHIE_2]: new TrainerConfig(++t).setName("Archie").initForEvilTeamLeader("Aqua Boss", [], true).setMixedBattleBgm("battle_aqua_magma_boss").setVictoryBgm("victory_team_plasma")
     .setPartyMemberFunc(0, getRandomPartyMemberFunc([ Species.EMPOLEON, Species.LUDICOLO ], TrainerSlot.TRAINER, true, p => {
@@ -2010,6 +2016,7 @@ export const trainerConfigs: TrainerConfigs = {
       p.pokeball = PokeballType.ULTRA_BALL;
       p.formIndex = 1; // Mega Sharpedo
       p.generateName();
+      p.gender = Gender.MALE;
     }))
     .setPartyMemberFunc(5, getRandomPartyMemberFunc([ Species.KYOGRE ], TrainerSlot.TRAINER, true, p => {
       p.setBoss(true, 2);
@@ -2031,6 +2038,7 @@ export const trainerConfigs: TrainerConfigs = {
       p.setBoss(true, 2);
       p.generateAndPopulateMoveset();
       p.pokeball = PokeballType.ULTRA_BALL;
+      p.gender = Gender.MALE;
     })),
   [TrainerType.CYRUS_2]: new TrainerConfig(++t).setName("Cyrus").initForEvilTeamLeader("Galactic Boss", [], true).setMixedBattleBgm("battle_galactic_boss").setVictoryBgm("victory_team_plasma")
     .setPartyMemberFunc(0, getRandomPartyMemberFunc([ Species.AZELF, Species.UXIE, Species.MESPRIT ], TrainerSlot.TRAINER, true, p => {
@@ -2049,6 +2057,7 @@ export const trainerConfigs: TrainerConfigs = {
       p.setBoss(true, 2);
       p.generateAndPopulateMoveset();
       p.pokeball = PokeballType.ULTRA_BALL;
+      p.gender = Gender.MALE;
     }))
     .setPartyMemberFunc(5, getRandomPartyMemberFunc([ Species.DARKRAI ], TrainerSlot.TRAINER, true, p => {
       p.setBoss(true, 2);
@@ -2065,6 +2074,7 @@ export const trainerConfigs: TrainerConfigs = {
       p.setBoss(true, 2);
       p.generateAndPopulateMoveset();
       p.pokeball = PokeballType.ULTRA_BALL;
+      p.gender = Gender.MALE;
     })),
   [TrainerType.GHETSIS_2]: new TrainerConfig(++t).setName("Ghetsis").initForEvilTeamLeader("Plasma Boss", [], true).setMixedBattleBgm("battle_plasma_boss").setVictoryBgm("victory_team_plasma")
     .setPartyMemberFunc(0, getRandomPartyMemberFunc([ Species.GENESECT ], TrainerSlot.TRAINER, true, p => {
@@ -2084,6 +2094,11 @@ export const trainerConfigs: TrainerConfigs = {
       p.setBoss(true, 2);
       p.generateAndPopulateMoveset();
       p.pokeball = PokeballType.ULTRA_BALL;
+      if (p.species.speciesId === Species.HYDREIGON) {
+        p.gender = Gender.MALE;
+      } else if (p.species.speciesId === Species.IRON_JUGULIS) {
+        p.gender = Gender.GENDERLESS;
+      }
     }))
     .setPartyMemberFunc(5, getRandomPartyMemberFunc([ Species.KYUREM ], TrainerSlot.TRAINER, true, p => {
       p.setBoss(true, 2);
@@ -2105,6 +2120,7 @@ export const trainerConfigs: TrainerConfigs = {
       p.pokeball = PokeballType.ULTRA_BALL;
       p.formIndex = 1; // Mega Gyarados
       p.generateName();
+      p.gender = Gender.MALE;
     })),
   [TrainerType.LYSANDRE_2]: new TrainerConfig(++t).setName("Lysandre").initForEvilTeamLeader("Flare Boss", [], true).setMixedBattleBgm("battle_flare_boss").setVictoryBgm("victory_team_plasma")
     .setPartyMemberFunc(0, getRandomPartyMemberFunc([ Species.SCREAM_TAIL, Species.FLUTTER_MANE ], TrainerSlot.TRAINER, true, p => {
@@ -2124,6 +2140,7 @@ export const trainerConfigs: TrainerConfigs = {
       p.pokeball = PokeballType.ULTRA_BALL;
       p.formIndex = 1; // Mega Gyardos
       p.generateName();
+      p.gender = Gender.MALE;
     }))
     .setPartyMemberFunc(5, getRandomPartyMemberFunc([ Species.YVELTAL ], TrainerSlot.TRAINER, true, p => {
       p.setBoss(true, 2);
@@ -2131,7 +2148,10 @@ export const trainerConfigs: TrainerConfigs = {
       p.pokeball = PokeballType.MASTER_BALL;
     })),
   [TrainerType.LUSAMINE]: new TrainerConfig(++t).setName("Lusamine").initForEvilTeamLeader("Aether Boss", []).setMixedBattleBgm("battle_aether_boss").setVictoryBgm("victory_team_plasma")
-    .setPartyMemberFunc(0, getRandomPartyMemberFunc([ Species.CLEFABLE ]))
+    .setPartyMemberFunc(0, getRandomPartyMemberFunc([ Species.CLEFABLE ], TrainerSlot.TRAINER, true, p => {
+      p.generateAndPopulateMoveset();
+      p.gender = Gender.FEMALE;
+    }))
     .setPartyMemberFunc(1, getRandomPartyMemberFunc([ Species.LILLIGANT, Species.HISUI_LILLIGANT ]))
     .setPartyMemberFunc(2, getRandomPartyMemberFunc([ Species.MILOTIC, Species.PRIMARINA ]))
     .setPartyMemberFunc(3, getRandomPartyMemberFunc([ Species.GALAR_SLOWBRO, Species.GALAR_SLOWKING ]))
@@ -2148,7 +2168,10 @@ export const trainerConfigs: TrainerConfigs = {
       p.pokeball = PokeballType.ROGUE_BALL;
     }))
     .setPartyMemberFunc(1, getRandomPartyMemberFunc([ Species.MILOTIC, Species.PRIMARINA ]))
-    .setPartyMemberFunc(2, getRandomPartyMemberFunc([ Species.CLEFABLE ]))
+    .setPartyMemberFunc(2, getRandomPartyMemberFunc([ Species.CLEFABLE ], TrainerSlot.TRAINER, true, p => {
+      p.generateAndPopulateMoveset();
+      p.gender = Gender.FEMALE;
+    }))
     .setPartyMemberFunc(3, getRandomPartyMemberFunc([ Species.STAKATAKA, Species.CELESTEELA, Species.GUZZLORD ], TrainerSlot.TRAINER, true, p => {
       p.generateAndPopulateMoveset();
       p.pokeball = PokeballType.ROGUE_BALL;
@@ -2191,6 +2214,7 @@ export const trainerConfigs: TrainerConfigs = {
     .setPartyMemberFunc(5, getRandomPartyMemberFunc([ Species.GOLISOPOD ], TrainerSlot.TRAINER, true, p => {
       p.setBoss(true, 2);
       p.generateAndPopulateMoveset();
+      p.gender = Gender.MALE;
       p.pokeball = PokeballType.ULTRA_BALL;
     })),
   [TrainerType.GUZMA_2]: new TrainerConfig(++t).setName("Guzma").initForEvilTeamLeader("Skull Boss", [], true).setMixedBattleBgm("battle_skull_boss").setVictoryBgm("victory_team_plasma")
@@ -2198,6 +2222,7 @@ export const trainerConfigs: TrainerConfigs = {
       p.setBoss(true, 2);
       p.generateAndPopulateMoveset();
       p.abilityIndex = 2; //Anticipation
+      p.gender = Gender.MALE;
       p.pokeball = PokeballType.ULTRA_BALL;
     }))
     .setPartyMemberFunc(1, getRandomPartyMemberFunc([ Species.SCIZOR, Species.KLEAVOR ], TrainerSlot.TRAINER, true, p => {
@@ -2239,6 +2264,7 @@ export const trainerConfigs: TrainerConfigs = {
       p.formIndex = 1; // G-Max Copperajah
       p.generateName();
       p.pokeball = PokeballType.ULTRA_BALL;
+      p.gender = Gender.FEMALE;
     })),
   [TrainerType.ROSE_2]: new TrainerConfig(++t).setName("Rose").initForEvilTeamLeader("Macro Boss", [], true).setMixedBattleBgm("battle_macro_boss").setVictoryBgm("victory_team_plasma")
     .setPartyMemberFunc(0, getRandomPartyMemberFunc([ Species.ARCHALUDON ], TrainerSlot.TRAINER, true, p => {
@@ -2262,6 +2288,7 @@ export const trainerConfigs: TrainerConfigs = {
       p.formIndex = 1; // G-Max Copperajah
       p.generateName();
       p.pokeball = PokeballType.ULTRA_BALL;
+      p.gender = Gender.FEMALE;
     })),
   [TrainerType.PENNY]: new TrainerConfig(++t).setName("Cassiopeia").initForEvilTeamLeader("Star Boss", []).setMixedBattleBgm("battle_star_boss").setVictoryBgm("victory_team_plasma")
     .setPartyMemberFunc(0, getRandomPartyMemberFunc([ Species.VAPOREON, Species.JOLTEON, Species.FLAREON ]))
@@ -2275,8 +2302,9 @@ export const trainerConfigs: TrainerConfigs = {
       p.formIndex = Utils.randSeedInt(5, 1); // Heat, Wash, Frost, Fan, or Mow
     }))
     .setPartyMemberFunc(4, getRandomPartyMemberFunc([ Species.SYLVEON ], TrainerSlot.TRAINER, true, p => {
-      p.generateAndPopulateMoveset();
       p.abilityIndex = 2; // Pixilate
+      p.generateAndPopulateMoveset();
+      p.gender = Gender.FEMALE;
     }))
     .setPartyMemberFunc(5, getRandomPartyMemberFunc([ Species.EEVEE ], TrainerSlot.TRAINER, true, p => {
       p.setBoss(true, 2);
@@ -2290,20 +2318,21 @@ export const trainerConfigs: TrainerConfigs = {
       return [ modifierTypes.TERA_SHARD().generateType([], [ teraPokemon.species.type1 ])!.withIdFromFunc(modifierTypes.TERA_SHARD).newModifier(teraPokemon) as PersistentModifier ]; //TODO: is the bang correct?
     }),
   [TrainerType.PENNY_2]: new TrainerConfig(++t).setName("Cassiopeia").initForEvilTeamLeader("Star Boss", [], true).setMixedBattleBgm("battle_star_boss").setVictoryBgm("victory_team_plasma")
-    .setPartyMemberFunc(0, getRandomPartyMemberFunc([ Species.REVAVROOM ], TrainerSlot.TRAINER, true, p => {
+    .setPartyMemberFunc(0, getRandomPartyMemberFunc([ Species.SYLVEON ], TrainerSlot.TRAINER, true, p => {
       p.setBoss(true, 2);
-      p.formIndex = Utils.randSeedInt(5, 1); //Random Starmobile form
+      p.abilityIndex = 2; // Pixilate
       p.generateAndPopulateMoveset();
-      p.pokeball = PokeballType.ULTRA_BALL;
+      p.gender = Gender.FEMALE;
     }))
     .setPartyMemberFunc(1, getRandomPartyMemberFunc([ Species.ENTEI, Species.RAIKOU, Species.SUICUNE ], TrainerSlot.TRAINER, true, p => {
       p.generateAndPopulateMoveset();
       p.pokeball = PokeballType.ULTRA_BALL;
     }))
     .setPartyMemberFunc(2, getRandomPartyMemberFunc([ Species.WALKING_WAKE, Species.GOUGING_FIRE, Species.RAGING_BOLT ]))
-    .setPartyMemberFunc(3, getRandomPartyMemberFunc([ Species.SYLVEON ], TrainerSlot.TRAINER, true, p => {
+    .setPartyMemberFunc(3, getRandomPartyMemberFunc([ Species.REVAVROOM ], TrainerSlot.TRAINER, true, p => {
+      p.formIndex = Utils.randSeedInt(5, 1); //Random Starmobile form
       p.generateAndPopulateMoveset();
-      p.abilityIndex = 2; // Pixilate
+      p.pokeball = PokeballType.ROGUE_BALL;
     }))
     .setPartyMemberFunc(4, getRandomPartyMemberFunc([ Species.EEVEE ], TrainerSlot.TRAINER, true, p => {
       p.setBoss(true, 2);
@@ -2318,7 +2347,7 @@ export const trainerConfigs: TrainerConfigs = {
       p.pokeball = PokeballType.MASTER_BALL;
     }))
     .setGenModifiersFunc(party => {
-      const teraPokemon = party[3];
+      const teraPokemon = party[0];
       return [ modifierTypes.TERA_SHARD().generateType([], [ teraPokemon.species.type1 ])!.withIdFromFunc(modifierTypes.TERA_SHARD).newModifier(teraPokemon) as PersistentModifier ]; //TODO: is the bang correct?
     }),
   [TrainerType.BUCK]: new TrainerConfig(++t).setName("Buck").initForStatTrainer([], true)

src/enums/battler-tag-type.ts

@@ -80,6 +80,7 @@ export enum BattlerTagType {
   DOUBLE_SHOCKED = "DOUBLE_SHOCKED",
   AUTOTOMIZED = "AUTOTOMIZED",
   MYSTERY_ENCOUNTER_POST_SUMMON = "MYSTERY_ENCOUNTER_POST_SUMMON",
+  POWER_TRICK = "POWER_TRICK",
   HEAL_BLOCK = "HEAL_BLOCK",
   TORMENT = "TORMENT",
   TAUNT = "TAUNT",

src/field/arena.ts

@@ -579,26 +579,28 @@ export class Arena {
    * Applies each `ArenaTag` in this Arena, based on which side (self, enemy, or both) is passed in as a parameter
    * @param tagType Either an {@linkcode ArenaTagType} string, or an actual {@linkcode ArenaTag} class to filter which ones to apply
    * @param side {@linkcode ArenaTagSide} which side's arena tags to apply
+   * @param simulated if `true`, this applies arena tags without changing game state
    * @param args array of parameters that the called upon tags may need
    */
-  applyTagsForSide(tagType: ArenaTagType | Constructor<ArenaTag>, side: ArenaTagSide, ...args: unknown[]): void {
+  applyTagsForSide(tagType: ArenaTagType | Constructor<ArenaTag>, side: ArenaTagSide, simulated: boolean, ...args: unknown[]): void {
     let tags = typeof tagType === "string"
       ? this.tags.filter(t => t.tagType === tagType)
       : this.tags.filter(t => t instanceof tagType);
     if (side !== ArenaTagSide.BOTH) {
       tags = tags.filter(t => t.side === side);
     }
-    tags.forEach(t => t.apply(this, args));
+    tags.forEach(t => t.apply(this, simulated, ...args));
   }
 
   /**
    * Applies the specified tag to both sides (ie: both user and trainer's tag that match the Tag specified)
    * by calling {@linkcode applyTagsForSide()}
    * @param tagType Either an {@linkcode ArenaTagType} string, or an actual {@linkcode ArenaTag} class to filter which ones to apply
+   * @param simulated if `true`, this applies arena tags without changing game state
    * @param args array of parameters that the called upon tags may need
    */
-  applyTags(tagType: ArenaTagType | Constructor<ArenaTag>, ...args: unknown[]): void {
+  applyTags(tagType: ArenaTagType | Constructor<ArenaTag>, simulated: boolean, ...args: unknown[]): void {
-    this.applyTagsForSide(tagType, ArenaTagSide.BOTH, ...args);
+    this.applyTagsForSide(tagType, ArenaTagSide.BOTH, simulated, ...args);
   }
 
   /**

src/field/pokemon.ts

@@ -5,7 +5,7 @@ import { variantData } from "#app/data/variant";
 import BattleInfo, { PlayerBattleInfo, EnemyBattleInfo } from "#app/ui/battle-info";
 import Move, { HighCritAttr, HitsTagAttr, applyMoveAttrs, FixedDamageAttr, VariableAtkAttr, allMoves, MoveCategory, TypelessAttr, CritOnlyAttr, getMoveTargets, OneHitKOAttr, VariableMoveTypeAttr, VariableDefAttr, AttackMove, ModifiedDamageAttr, VariableMoveTypeMultiplierAttr, IgnoreOpponentStatStagesAttr, SacrificialAttr, VariableMoveCategoryAttr, CounterDamageAttr, StatStageChangeAttr, RechargeAttr, ChargeAttr, IgnoreWeatherTypeDebuffAttr, BypassBurnDamageReductionAttr, SacrificialAttrOnHit, OneHitKOAccuracyAttr, RespectAttackTypeImmunityAttr, MoveTarget, CombinedPledgeStabBoostAttr } from "#app/data/move";
 import { default as PokemonSpecies, PokemonSpeciesForm, getFusedSpeciesName, getPokemonSpecies, getPokemonSpeciesForm } from "#app/data/pokemon-species";
-import { getStarterValueFriendshipCap, speciesStarterCosts } from "#app/data/balance/starters";
+import { CLASSIC_CANDY_FRIENDSHIP_MULTIPLIER, getStarterValueFriendshipCap, speciesStarterCosts } from "#app/data/balance/starters";
 import { starterPassiveAbilities } from "#app/data/balance/passives";
 import { Constructor, isNullOrUndefined, randSeedInt } from "#app/utils";
 import * as Utils from "#app/utils";
@@ -19,10 +19,10 @@ import { initMoveAnim, loadMoveAnimAssets } from "#app/data/battle-anims";
 import { Status, StatusEffect, getRandomStatus } from "#app/data/status-effect";
 import { pokemonEvolutions, pokemonPrevolutions, SpeciesFormEvolution, SpeciesEvolutionCondition, FusionSpeciesFormEvolution } from "#app/data/balance/pokemon-evolutions";
 import { reverseCompatibleTms, tmSpecies, tmPoolTiers } from "#app/data/balance/tms";
-import { BattlerTag, BattlerTagLapseType, EncoreTag, GroundedTag, HighestStatBoostTag, SubstituteTag, TypeImmuneTag, getBattlerTag, SemiInvulnerableTag, TypeBoostTag, MoveRestrictionBattlerTag, ExposedTag, DragonCheerTag, CritBoostTag, TrappedTag, TarShotTag, AutotomizedTag } from "../data/battler-tags";
+import { BattlerTag, BattlerTagLapseType, EncoreTag, GroundedTag, HighestStatBoostTag, SubstituteTag, TypeImmuneTag, getBattlerTag, SemiInvulnerableTag, TypeBoostTag, MoveRestrictionBattlerTag, ExposedTag, DragonCheerTag, CritBoostTag, TrappedTag, TarShotTag, AutotomizedTag, PowerTrickTag } from "../data/battler-tags";
 import { WeatherType } from "#app/data/weather";
 import { ArenaTagSide, NoCritTag, WeakenMoveScreenTag } from "#app/data/arena-tag";
-import { Ability, AbAttr, StatMultiplierAbAttr, BlockCritAbAttr, BonusCritAbAttr, BypassBurnDamageReductionAbAttr, FieldPriorityMoveImmunityAbAttr, IgnoreOpponentStatStagesAbAttr, MoveImmunityAbAttr, PreDefendFullHpEndureAbAttr, ReceivedMoveDamageMultiplierAbAttr, ReduceStatusEffectDurationAbAttr, StabBoostAbAttr, StatusEffectImmunityAbAttr, TypeImmunityAbAttr, WeightMultiplierAbAttr, allAbilities, applyAbAttrs, applyStatMultiplierAbAttrs, applyPreApplyBattlerTagAbAttrs, applyPreAttackAbAttrs, applyPreDefendAbAttrs, applyPreSetStatusAbAttrs, UnsuppressableAbilityAbAttr, SuppressFieldAbilitiesAbAttr, NoFusionAbilityAbAttr, MultCritAbAttr, IgnoreTypeImmunityAbAttr, DamageBoostAbAttr, IgnoreTypeStatusEffectImmunityAbAttr, ConditionalCritAbAttr, applyFieldStatMultiplierAbAttrs, FieldMultiplyStatAbAttr, AddSecondStrikeAbAttr, UserFieldStatusEffectImmunityAbAttr, UserFieldBattlerTagImmunityAbAttr, BattlerTagImmunityAbAttr, MoveTypeChangeAbAttr, FullHpResistTypeAbAttr, applyCheckTrappedAbAttrs, CheckTrappedAbAttr, PostSetStatusAbAttr, applyPostSetStatusAbAttrs } from "#app/data/ability";
+import { Ability, AbAttr, StatMultiplierAbAttr, BlockCritAbAttr, BonusCritAbAttr, BypassBurnDamageReductionAbAttr, FieldPriorityMoveImmunityAbAttr, IgnoreOpponentStatStagesAbAttr, MoveImmunityAbAttr, PreDefendFullHpEndureAbAttr, ReceivedMoveDamageMultiplierAbAttr, StabBoostAbAttr, StatusEffectImmunityAbAttr, TypeImmunityAbAttr, WeightMultiplierAbAttr, allAbilities, applyAbAttrs, applyStatMultiplierAbAttrs, applyPreApplyBattlerTagAbAttrs, applyPreAttackAbAttrs, applyPreDefendAbAttrs, applyPreSetStatusAbAttrs, UnsuppressableAbilityAbAttr, SuppressFieldAbilitiesAbAttr, NoFusionAbilityAbAttr, MultCritAbAttr, IgnoreTypeImmunityAbAttr, DamageBoostAbAttr, IgnoreTypeStatusEffectImmunityAbAttr, ConditionalCritAbAttr, applyFieldStatMultiplierAbAttrs, FieldMultiplyStatAbAttr, AddSecondStrikeAbAttr, UserFieldStatusEffectImmunityAbAttr, UserFieldBattlerTagImmunityAbAttr, BattlerTagImmunityAbAttr, MoveTypeChangeAbAttr, FullHpResistTypeAbAttr, applyCheckTrappedAbAttrs, CheckTrappedAbAttr, PostSetStatusAbAttr, applyPostSetStatusAbAttrs, InfiltratorAbAttr } from "#app/data/ability";
 import PokemonData from "#app/system/pokemon-data";
 import { BattlerIndex } from "#app/battle";
 import { Mode } from "#app/ui/ui";
@@ -62,7 +62,7 @@ import { ToggleDoublePositionPhase } from "#app/phases/toggle-double-position-ph
 import { Challenges } from "#enums/challenges";
 import { PokemonAnimType } from "#enums/pokemon-anim-type";
 import { PLAYER_PARTY_MAX_SIZE } from "#app/constants";
-import { MysteryEncounterPokemonData } from "#app/data/mystery-encounters/mystery-encounter-pokemon-data";
+import { CustomPokemonData } from "#app/data/custom-pokemon-data";
 import { SwitchType } from "#enums/switch-type";
 import { SpeciesFormKey } from "#enums/species-form-key";
 import { BASE_HIDDEN_ABILITY_CHANCE, BASE_SHINY_CHANCE, SHINY_EPIC_CHANCE, SHINY_VARIANT_CHANCE } from "#app/data/balance/rates";
@@ -114,7 +114,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   public fusionVariant: Variant;
   public fusionGender: Gender;
   public fusionLuck: integer;
-  public fusionMysteryEncounterPokemonData: MysteryEncounterPokemonData | null;
+  public fusionCustomPokemonData: CustomPokemonData | null;
 
   private summonDataPrimer: PokemonSummonData | null;
 
@@ -122,7 +122,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   public battleData: PokemonBattleData;
   public battleSummonData: PokemonBattleSummonData;
   public turnData: PokemonTurnData;
-  public mysteryEncounterPokemonData: MysteryEncounterPokemonData;
+  public customPokemonData: CustomPokemonData;
 
   /** Used by Mystery Encounters to execute pokemon-specific logic (such as stat boosts) at start of battle */
   public mysteryEncounterBattleEffects?: (pokemon: Pokemon) => void;
@@ -193,7 +193,6 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       }
       this.nature = dataSource.nature || 0 as Nature;
       this.nickname = dataSource.nickname;
-      this.natureOverride = dataSource.natureOverride !== undefined ? dataSource.natureOverride : -1;
       this.moveset = dataSource.moveset;
       this.status = dataSource.status!; // TODO: is this bang correct?
       this.friendship = dataSource.friendship !== undefined ? dataSource.friendship : this.species.baseFriendship;
@@ -212,9 +211,9 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       this.fusionVariant = dataSource.fusionVariant || 0;
       this.fusionGender = dataSource.fusionGender;
       this.fusionLuck = dataSource.fusionLuck;
-      this.fusionMysteryEncounterPokemonData = dataSource.fusionMysteryEncounterPokemonData;
+      this.fusionCustomPokemonData = dataSource.fusionCustomPokemonData;
       this.usedTMs = dataSource.usedTMs ?? [];
-      this.mysteryEncounterPokemonData = new MysteryEncounterPokemonData(dataSource.mysteryEncounterPokemonData);
+      this.customPokemonData = new CustomPokemonData(dataSource.customPokemonData);
     } else {
       this.id = Utils.randSeedInt(4294967296);
       this.ivs = ivs || Utils.getIvsFromId(this.id);
@@ -235,7 +234,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
         this.variant = this.shiny ? this.generateVariant() : 0;
       }
 
-      this.mysteryEncounterPokemonData = new MysteryEncounterPokemonData();
+      this.customPokemonData = new CustomPokemonData();
 
       if (nature !== undefined) {
         this.setNature(nature);
@@ -243,8 +242,6 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
         this.generateNature();
       }
 
-      this.natureOverride = -1;
-
       this.friendship = species.baseFriendship;
       this.metLevel = level;
       this.metBiome = scene.currentBattle ? scene.arena.biomeType : -1;
@@ -593,8 +590,8 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     const formKey = this.getFormKey();
     if (this.isMax() === true || formKey === "segin-starmobile" || formKey === "schedar-starmobile" || formKey === "navi-starmobile" || formKey === "ruchbah-starmobile" || formKey === "caph-starmobile") {
       return 1.5;
-    } else if (this.mysteryEncounterPokemonData.spriteScale > 0) {
+    } else if (this.customPokemonData.spriteScale > 0) {
-      return this.mysteryEncounterPokemonData.spriteScale;
+      return this.customPokemonData.spriteScale;
     }
     return 1;
   }
@@ -1023,7 +1020,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   }
 
   getNature(): Nature {
-    return this.natureOverride !== -1 ? this.natureOverride : this.nature;
+    return this.customPokemonData.nature !== -1 ? this.customPokemonData.nature : this.nature;
   }
 
   setNature(nature: Nature): void {
@@ -1198,15 +1195,15 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     if (!types.length || !includeTeraType) {
       if (!ignoreOverride && this.summonData?.types && this.summonData.types.length > 0) {
         this.summonData.types.forEach(t => types.push(t));
-      } else if (this.mysteryEncounterPokemonData.types && this.mysteryEncounterPokemonData.types.length > 0) {
+      } else if (this.customPokemonData.types && this.customPokemonData.types.length > 0) {
         // "Permanent" override for a Pokemon's normal types, currently only used by Mystery Encounters
-        types.push(this.mysteryEncounterPokemonData.types[0]);
+        types.push(this.customPokemonData.types[0]);
 
         // Fusing a Pokemon onto something with "permanently changed" types will still apply the fusion's types as normal
         const fusionSpeciesForm = this.getFusionSpeciesForm(ignoreOverride);
         if (fusionSpeciesForm) {
           // Check if the fusion Pokemon also had "permanently changed" types
-          const fusionMETypes = this.fusionMysteryEncounterPokemonData?.types;
+          const fusionMETypes = this.fusionCustomPokemonData?.types;
           if (fusionMETypes && fusionMETypes.length >= 2 && fusionMETypes[1] !== types[0]) {
             types.push(fusionMETypes[1]);
           } else if (fusionMETypes && fusionMETypes.length === 1 && fusionMETypes[0] !== types[0]) {
@@ -1218,8 +1215,8 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
           }
         }
 
-        if (types.length === 1 && this.mysteryEncounterPokemonData.types.length >= 2) {
+        if (types.length === 1 && this.customPokemonData.types.length >= 2) {
-          types.push(this.mysteryEncounterPokemonData.types[1]);
+          types.push(this.customPokemonData.types[1]);
         }
       } else {
         const speciesForm = this.getSpeciesForm(ignoreOverride);
@@ -1230,7 +1227,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
         if (fusionSpeciesForm) {
           // Check if the fusion Pokemon also had "permanently changed" types
           // Otherwise, use standard fusion type logic
-          const fusionMETypes = this.fusionMysteryEncounterPokemonData?.types;
+          const fusionMETypes = this.fusionCustomPokemonData?.types;
           if (fusionMETypes && fusionMETypes.length >= 2 && fusionMETypes[1] !== types[0]) {
             types.push(fusionMETypes[1]);
           } else if (fusionMETypes && fusionMETypes.length === 1 && fusionMETypes[0] !== types[0]) {
@@ -1262,6 +1259,11 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       }
     }
 
+    // If both types are the same (can happen in weird custom typing scenarios), reduce to single type
+    if (types.length > 1 && types[0] === types[1]) {
+      types.splice(0, 1);
+    }
+
     return types;
   }
 
@@ -1288,14 +1290,14 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       return allAbilities[Overrides.OPP_ABILITY_OVERRIDE];
     }
     if (this.isFusion()) {
-      if (!isNullOrUndefined(this.fusionMysteryEncounterPokemonData?.ability) && this.fusionMysteryEncounterPokemonData.ability !== -1) {
+      if (!isNullOrUndefined(this.fusionCustomPokemonData?.ability) && this.fusionCustomPokemonData.ability !== -1) {
-        return allAbilities[this.fusionMysteryEncounterPokemonData.ability];
+        return allAbilities[this.fusionCustomPokemonData.ability];
       } else {
         return allAbilities[this.getFusionSpeciesForm(ignoreOverride).getAbility(this.fusionAbilityIndex)];
       }
     }
-    if (!isNullOrUndefined(this.mysteryEncounterPokemonData.ability) && this.mysteryEncounterPokemonData.ability !== -1) {
+    if (!isNullOrUndefined(this.customPokemonData.ability) && this.customPokemonData.ability !== -1) {
-      return allAbilities[this.mysteryEncounterPokemonData.ability];
+      return allAbilities[this.customPokemonData.ability];
     }
     let abilityId = this.getSpeciesForm(ignoreOverride).getAbility(this.abilityIndex);
     if (abilityId === Abilities.NONE) {
@@ -1318,8 +1320,8 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     if (Overrides.OPP_PASSIVE_ABILITY_OVERRIDE && !this.isPlayer()) {
       return allAbilities[Overrides.OPP_PASSIVE_ABILITY_OVERRIDE];
     }
-    if (!isNullOrUndefined(this.mysteryEncounterPokemonData.passive) && this.mysteryEncounterPokemonData.passive !== -1) {
+    if (!isNullOrUndefined(this.customPokemonData.passive) && this.customPokemonData.passive !== -1) {
-      return allAbilities[this.mysteryEncounterPokemonData.passive];
+      return allAbilities[this.customPokemonData.passive];
     }
 
     let starterSpeciesId = this.species.speciesId;
@@ -1538,7 +1540,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     applyMoveAttrs(VariableMoveTypeAttr, this, null, move, moveTypeHolder);
     applyPreAttackAbAttrs(MoveTypeChangeAbAttr, this, null, move, simulated, moveTypeHolder);
 
-    this.scene.arena.applyTags(ArenaTagType.ION_DELUGE, moveTypeHolder);
+    this.scene.arena.applyTags(ArenaTagType.ION_DELUGE, simulated, moveTypeHolder);
     if (this.getTag(BattlerTagType.ELECTRIFIED)) {
       moveTypeHolder.value = Type.ELECTRIC;
     }
@@ -2018,7 +2020,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     this.fusionVariant = 0;
     this.fusionGender = 0;
     this.fusionLuck = 0;
-    this.fusionMysteryEncounterPokemonData = null;
+    this.fusionCustomPokemonData = null;
 
     this.generateName();
     this.calculateStats();
@@ -2187,8 +2189,11 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       this.moveset.push(new PokemonMove(movePool[index][0], 0, 0));
     }
 
+    // Trigger FormChange, except for enemy Pokemon during Mystery Encounters, to avoid crashes
+    if (this.isPlayer() || !this.scene.currentBattle?.isBattleMysteryEncounter() || !this.scene.currentBattle?.mysteryEncounter) {
       this.scene.triggerPokemonFormChange(this, SpeciesFormChangeMoveLearnedTrigger);
     }
+  }
 
   trySelectMove(moveIndex: integer, ignorePp?: boolean): boolean {
     const move = this.getMoveset().length > moveIndex
@@ -2285,6 +2290,15 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     this.levelExp = this.exp - getLevelTotalExp(this.level, this.species.growthRate);
   }
 
+  /**
+   * Compares if `this` and {@linkcode target} are on the same team.
+   * @param target the {@linkcode Pokemon} to compare against.
+   * @returns `true` if the two pokemon are allies, `false` otherwise
+   */
+  public isOpponent(target: Pokemon): boolean {
+    return this.isPlayer() !== target.isPlayer();
+  }
+
   getOpponent(targetIndex: integer): Pokemon | null {
     const ret = this.getOpponents()[targetIndex];
     if (ret.summonData) {
@@ -2605,7 +2619,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
 
     /** Reduces damage if this Pokemon has a relevant screen (e.g. Light Screen for special attacks) */
     const screenMultiplier = new Utils.NumberHolder(1);
-    this.scene.arena.applyTagsForSide(WeakenMoveScreenTag, defendingSide, move.category, this.scene.currentBattle.double, screenMultiplier);
+    this.scene.arena.applyTagsForSide(WeakenMoveScreenTag, defendingSide, simulated, source, moveCategory, screenMultiplier);
 
     /**
      * For each {@linkcode HitsTagAttr} the move has, doubles the damage of the move if:
@@ -2810,15 +2824,16 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       if (this.isFainted()) {
         // set splice index here, so future scene queues happen before FaintedPhase
         this.scene.setPhaseQueueSplice();
+        if (!isNullOrUndefined(destinyTag) && dmg) {
+          // Destiny Bond will activate during FaintPhase
+          this.scene.unshiftPhase(new FaintPhase(this.scene, this.getBattlerIndex(), isOneHitKo, destinyTag, source));
+        } else {
           this.scene.unshiftPhase(new FaintPhase(this.scene, this.getBattlerIndex(), isOneHitKo));
+        }
         this.destroySubstitute();
         this.resetSummonData();
       }
 
-      if (dmg) {
-        destinyTag?.lapse(source, BattlerTagLapseType.CUSTOM);
-      }
-
       return result;
     }
   }
@@ -3048,6 +3063,10 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
         continue;
       }
 
+      if (tag instanceof PowerTrickTag) {
+        tag.swapStat(this);
+      }
+
       this.summonData.tags.push(tag);
     }
 
@@ -3342,13 +3361,12 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       }
     }
 
-    const types = this.getTypes(true, true);
+    if (sourcePokemon && sourcePokemon !== this && this.isSafeguarded(sourcePokemon)) {
-
-    const defendingSide = this.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY;
-    if (sourcePokemon && sourcePokemon !== this && this.scene.arena.getTagOnSide(ArenaTagType.SAFEGUARD, defendingSide)) {
       return false;
     }
 
+    const types = this.getTypes(true, true);
+
     switch (effect) {
       case StatusEffect.POISON:
       case StatusEffect.TOXIC:
@@ -3412,7 +3430,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     return true;
   }
 
-  trySetStatus(effect: StatusEffect | undefined, asPhase: boolean = false, sourcePokemon: Pokemon | null = null, cureTurn: integer | null = 0, sourceText: string | null = null): boolean {
+  trySetStatus(effect?: StatusEffect, asPhase: boolean = false, sourcePokemon: Pokemon | null = null, turnsRemaining: number = 0, sourceText: string | null = null): boolean {
     if (!this.canSetStatus(effect, asPhase, false, sourcePokemon)) {
       return false;
     }
@@ -3426,15 +3444,14 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     }
 
     if (asPhase) {
-      this.scene.unshiftPhase(new ObtainStatusEffectPhase(this.scene, this.getBattlerIndex(), effect, cureTurn, sourceText, sourcePokemon));
+      this.scene.unshiftPhase(new ObtainStatusEffectPhase(this.scene, this.getBattlerIndex(), effect, turnsRemaining, sourceText, sourcePokemon));
       return true;
     }
 
-    let statusCureTurn: Utils.IntegerHolder;
+    let sleepTurnsRemaining: Utils.NumberHolder;
 
     if (effect === StatusEffect.SLEEP) {
-      statusCureTurn = new Utils.IntegerHolder(this.randSeedIntRange(2, 4));
+      sleepTurnsRemaining = new Utils.NumberHolder(this.randSeedIntRange(2, 4));
-      applyAbAttrs(ReduceStatusEffectDurationAbAttr, this, null, false, effect, statusCureTurn);
 
       this.setFrameRate(4);
 
@@ -3454,9 +3471,9 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       }
     }
 
-    statusCureTurn = statusCureTurn!; // tell TS compiler it's defined
+    sleepTurnsRemaining = sleepTurnsRemaining!; // tell TS compiler it's defined
     effect = effect!; // If `effect` is undefined then `trySetStatus()` will have already returned early via the `canSetStatus()` call
-    this.status = new Status(effect, 0, statusCureTurn?.value);
+    this.status = new Status(effect, 0, sleepTurnsRemaining?.value);
 
     if (effect !== StatusEffect.FAINT) {
       this.scene.triggerPokemonFormChange(this, SpeciesFormChangeStatusEffectTrigger, true);
@@ -3494,6 +3511,23 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     }
   }
 
+  /**
+   * Checks if this Pokemon is protected by Safeguard
+   * @param attacker the {@linkcode Pokemon} inflicting status on this Pokemon
+   * @returns `true` if this Pokemon is protected by Safeguard; `false` otherwise.
+   */
+  isSafeguarded(attacker: Pokemon): boolean {
+    const defendingSide = this.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY;
+    if (this.scene.arena.getTagOnSide(ArenaTagType.SAFEGUARD, defendingSide)) {
+      const bypassed = new Utils.BooleanHolder(false);
+      if (attacker) {
+        applyAbAttrs(InfiltratorAbAttr, attacker, null, false, bypassed);
+      }
+      return !bypassed.value;
+    }
+    return false;
+  }
+
   primeSummonData(summonDataPrimer: PokemonSummonData): void {
     this.summonDataPrimer = summonDataPrimer;
   }
@@ -3966,16 +4000,20 @@ export class PlayerPokemon extends Pokemon {
     super(scene, 106, 148, species, level, abilityIndex, formIndex, gender, shiny, variant, ivs, nature, dataSource);
 
     if (Overrides.STATUS_OVERRIDE) {
-      this.status = new Status(Overrides.STATUS_OVERRIDE);
+      this.status = new Status(Overrides.STATUS_OVERRIDE, 0, 4);
     }
 
     if (Overrides.SHINY_OVERRIDE) {
       this.shiny = true;
       this.initShinySparkle();
-      if (Overrides.VARIANT_OVERRIDE) {
+    } else if (Overrides.SHINY_OVERRIDE === false) {
+      this.shiny = false;
+    }
+
+    if (Overrides.VARIANT_OVERRIDE !== null && this.shiny) {
       this.variant = Overrides.VARIANT_OVERRIDE;
     }
-    }
+
     if (!dataSource) {
       if (this.scene.gameMode.isDaily) {
         this.generateAndPopulateMoveset();
@@ -4077,7 +4115,7 @@ export class PlayerPokemon extends Pokemon {
       fusionStarterSpeciesId ? this.scene.gameData.starterData[fusionStarterSpeciesId] : null
     ].filter(d => !!d);
     const amount = new Utils.IntegerHolder(friendship);
-    const starterAmount = new Utils.IntegerHolder(Math.floor(friendship * (this.scene.gameMode.isClassic && friendship > 0 ? 2 : 1) / (fusionStarterSpeciesId ? 2 : 1)));
+    const starterAmount = new Utils.IntegerHolder(Math.floor(friendship * (this.scene.gameMode.isClassic && friendship > 0 ? CLASSIC_CANDY_FRIENDSHIP_MULTIPLIER : 1) / (fusionStarterSpeciesId ? 2 : 1)));
     if (amount.value > 0) {
       this.scene.applyModifier(PokemonFriendshipBoosterModifier, true, this, amount);
       this.scene.applyModifier(PokemonFriendshipBoosterModifier, true, this, starterAmount);
@@ -4287,12 +4325,33 @@ export class PlayerPokemon extends Pokemon {
 
   changeForm(formChange: SpeciesFormChange): Promise<void> {
     return new Promise(resolve => {
+      const previousFormIndex = this.formIndex;
       this.formIndex = Math.max(this.species.forms.findIndex(f => f.formKey === formChange.formKey), 0);
       this.generateName();
       const abilityCount = this.getSpeciesForm().getAbilityCount();
       if (this.abilityIndex >= abilityCount) { // Shouldn't happen
         this.abilityIndex = abilityCount - 1;
       }
+
+      // In cases where a form change updates the type of a Pokemon from its previous form (Arceus, Silvally, Castform, etc.),
+      // persist that type change in customPokemonData if necessary
+      const baseForm = this.species.forms[previousFormIndex];
+      const baseFormTypes = [ baseForm.type1, baseForm.type2 ];
+      if (this.customPokemonData.types.length > 0) {
+        if (this.getSpeciesForm().type1 !== baseFormTypes[0]) {
+          this.customPokemonData.types[0] = this.getSpeciesForm().type1;
+        }
+
+        const type2 = this.getSpeciesForm().type2;
+        if (!isNullOrUndefined(type2) && type2 !== baseFormTypes[1]) {
+          if (this.customPokemonData.types.length > 1) {
+            this.customPokemonData.types[1] = type2;
+          } else {
+            this.customPokemonData.types.push(type2);
+          }
+        }
+      }
+
       this.compatibleTms.splice(0, this.compatibleTms.length);
       this.generateCompatibleTms();
       const updateAndResolve = () => {
@@ -4329,7 +4388,7 @@ export class PlayerPokemon extends Pokemon {
       this.fusionVariant = pokemon.variant;
       this.fusionGender = pokemon.gender;
       this.fusionLuck = pokemon.luck;
-      this.fusionMysteryEncounterPokemonData = pokemon.mysteryEncounterPokemonData;
+      this.fusionCustomPokemonData = pokemon.customPokemonData;
       if ((pokemon.pauseEvolutions) || (this.pauseEvolutions)) {
         this.pauseEvolutions = true;
       }
@@ -4421,7 +4480,7 @@ export class EnemyPokemon extends Pokemon {
     }
 
     if (Overrides.OPP_STATUS_OVERRIDE) {
-      this.status = new Status(Overrides.OPP_STATUS_OVERRIDE);
+      this.status = new Status(Overrides.OPP_STATUS_OVERRIDE, 0, 4);
     }
 
     if (Overrides.OPP_GENDER_OVERRIDE) {
@@ -4430,9 +4489,11 @@ export class EnemyPokemon extends Pokemon {
 
     const speciesId = this.species.speciesId;
 
-    if (speciesId in Overrides.OPP_FORM_OVERRIDES
+    if (
+      speciesId in Overrides.OPP_FORM_OVERRIDES
       && Overrides.OPP_FORM_OVERRIDES[speciesId]
-      && this.species.forms[Overrides.OPP_FORM_OVERRIDES[speciesId]]) {
+      && this.species.forms[Overrides.OPP_FORM_OVERRIDES[speciesId]]
+    ) {
       this.formIndex = Overrides.OPP_FORM_OVERRIDES[speciesId] ?? 0;
     }
 
@@ -4443,10 +4504,13 @@ export class EnemyPokemon extends Pokemon {
       if (Overrides.OPP_SHINY_OVERRIDE) {
         this.shiny = true;
         this.initShinySparkle();
+      } else if (Overrides.OPP_SHINY_OVERRIDE === false) {
+        this.shiny = false;
       }
+
       if (this.shiny) {
         this.variant = this.generateVariant();
-        if (Overrides.OPP_VARIANT_OVERRIDE) {
+        if (Overrides.OPP_VARIANT_OVERRIDE !== null) {
           this.variant = Overrides.OPP_VARIANT_OVERRIDE;
         }
       }

src/modifier/modifier-type.ts

@@ -1126,7 +1126,7 @@ class EvolutionItemModifierTypeGenerator extends ModifierTypeGenerator {
 }
 
 class FormChangeItemModifierTypeGenerator extends ModifierTypeGenerator {
-  constructor(rare: boolean) {
+  constructor(isRareFormChangeItem: boolean) {
     super((party: Pokemon[], pregenArgs?: any[]) => {
       if (pregenArgs && (pregenArgs.length === 1) && (pregenArgs[0] in FormChangeItem)) {
         return new FormChangeItemModifierType(pregenArgs[0] as FormChangeItem);
@@ -1167,7 +1167,7 @@ class FormChangeItemModifierTypeGenerator extends ModifierTypeGenerator {
         }
         return formChangeItemTriggers;
       }).flat())
-      ].flat().flatMap(fc => fc.item).filter(i => (i && i < 100) === rare);
+      ].flat().flatMap(fc => fc.item).filter(i => (i && i < 100) === isRareFormChangeItem);
       // convert it into a set to remove duplicate values, which can appear when the same species with a potential form change is in the party.
 
       if (!formChangeItemPool.length) {
@@ -2227,7 +2227,8 @@ export function getPlayerShopModifierTypeOptionsForWave(waveIndex: integer, base
     ],
     [
       new ModifierTypeOption(modifierTypes.HYPER_POTION(), 0, baseCost * 0.8),
-      new ModifierTypeOption(modifierTypes.MAX_REVIVE(), 0, baseCost * 2.75)
+      new ModifierTypeOption(modifierTypes.MAX_REVIVE(), 0, baseCost * 2.75),
+      new ModifierTypeOption(modifierTypes.MEMORY_MUSHROOM(), 0, baseCost * 4)
     ],
     [
       new ModifierTypeOption(modifierTypes.MAX_POTION(), 0, baseCost * 1.5),

src/modifier/modifier.ts

@@ -11,7 +11,7 @@ import Pokemon, { type PlayerPokemon } from "#app/field/pokemon";
 import { getPokemonNameWithAffix } from "#app/messages";
 import Overrides from "#app/overrides";
 import { EvolutionPhase } from "#app/phases/evolution-phase";
-import { LearnMovePhase } from "#app/phases/learn-move-phase";
+import { LearnMovePhase, LearnMoveType } from "#app/phases/learn-move-phase";
 import { LevelUpPhase } from "#app/phases/level-up-phase";
 import { PokemonHealPhase } from "#app/phases/pokemon-heal-phase";
 import { achvs } from "#app/system/achv";
@@ -30,6 +30,7 @@ import { StatusEffect } from "#enums/status-effect";
 import i18next from "i18next";
 import { type DoubleBattleChanceBoosterModifierType, type EvolutionItemModifierType, type FormChangeItemModifierType, type ModifierOverride, type ModifierType, type PokemonBaseStatTotalModifierType, type PokemonExpBoosterModifierType, type PokemonFriendshipBoosterModifierType, type PokemonMoveAccuracyBoosterModifierType, type PokemonMultiHitModifierType, type TerastallizeModifierType, type TmModifierType, getModifierType, ModifierPoolType, ModifierTypeGenerator, modifierTypes, PokemonHeldItemModifierType } from "./modifier-type";
 import { Color, ShadowColor } from "#enums/color";
+import { FRIENDSHIP_GAIN_FROM_RARE_CANDY } from "#app/data/balance/starters";
 
 export type ModifierPredicate = (modifier: Modifier) => boolean;
 
@@ -2180,7 +2181,7 @@ export class PokemonNatureChangeModifier extends ConsumablePokemonModifier {
    * @returns
    */
   override apply(playerPokemon: PlayerPokemon): boolean {
-    playerPokemon.natureOverride = this.nature;
+    playerPokemon.customPokemonData.nature = this.nature;
     let speciesId = playerPokemon.species.speciesId;
     playerPokemon.scene.gameData.dexData[speciesId].natureAttr |= 1 << (this.nature + 1);
 
@@ -2213,7 +2214,7 @@ export class PokemonLevelIncrementModifier extends ConsumablePokemonModifier {
       playerPokemon.levelExp = 0;
     }
 
-    playerPokemon.addFriendship(5);
+    playerPokemon.addFriendship(FRIENDSHIP_GAIN_FROM_RARE_CANDY);
 
     playerPokemon.scene.unshiftPhase(new LevelUpPhase(playerPokemon.scene, playerPokemon.scene.getParty().indexOf(playerPokemon), playerPokemon.level - levelCount.value, playerPokemon.level));
 
@@ -2235,7 +2236,7 @@ export class TmModifier extends ConsumablePokemonModifier {
    */
   override apply(playerPokemon: PlayerPokemon): boolean {
 
-    playerPokemon.scene.unshiftPhase(new LearnMovePhase(playerPokemon.scene, playerPokemon.scene.getParty().indexOf(playerPokemon), this.type.moveId, true));
+    playerPokemon.scene.unshiftPhase(new LearnMovePhase(playerPokemon.scene, playerPokemon.scene.getParty().indexOf(playerPokemon), this.type.moveId, LearnMoveType.TM));
 
     return true;
   }
@@ -2255,8 +2256,9 @@ export class RememberMoveModifier extends ConsumablePokemonModifier {
    * @param playerPokemon The {@linkcode PlayerPokemon} that should remember the move
    * @returns always `true`
    */
-  override apply(playerPokemon: PlayerPokemon): boolean {
+  override apply(playerPokemon: PlayerPokemon, cost?: number): boolean {
-    playerPokemon.scene.unshiftPhase(new LearnMovePhase(playerPokemon.scene, playerPokemon.scene.getParty().indexOf(playerPokemon), playerPokemon.getLearnableLevelMoves()[this.levelMoveIndex]));
+
+    playerPokemon.scene.unshiftPhase(new LearnMovePhase(playerPokemon.scene, playerPokemon.scene.getParty().indexOf(playerPokemon), playerPokemon.getLearnableLevelMoves()[this.levelMoveIndex], LearnMoveType.MEMORY, cost));
 
     return true;
   }

src/overrides.ts

@@ -113,8 +113,8 @@ class DefaultOverrides {
   readonly STATUS_OVERRIDE: StatusEffect = StatusEffect.NONE;
   readonly GENDER_OVERRIDE: Gender | null = null;
   readonly MOVESET_OVERRIDE: Moves | Array<Moves> = [];
-  readonly SHINY_OVERRIDE: boolean = false;
+  readonly SHINY_OVERRIDE: boolean | null = null;
-  readonly VARIANT_OVERRIDE: Variant = 0;
+  readonly VARIANT_OVERRIDE: Variant | null = null;
 
   // --------------------------
   // OPPONENT / ENEMY OVERRIDES
@@ -134,8 +134,8 @@ class DefaultOverrides {
   readonly OPP_STATUS_OVERRIDE: StatusEffect = StatusEffect.NONE;
   readonly OPP_GENDER_OVERRIDE: Gender | null = null;
   readonly OPP_MOVESET_OVERRIDE: Moves | Array<Moves> = [];
-  readonly OPP_SHINY_OVERRIDE: boolean = false;
+  readonly OPP_SHINY_OVERRIDE: boolean | null = null;
-  readonly OPP_VARIANT_OVERRIDE: Variant = 0;
+  readonly OPP_VARIANT_OVERRIDE: Variant | null = null;
   readonly OPP_IVS_OVERRIDE: number | number[] = [];
   readonly OPP_FORM_OVERRIDES: Partial<Record<Species, number>> = {};
   /**

src/phases/egg-lapse-phase.ts

@@ -33,7 +33,7 @@ export class EggLapsePhase extends Phase {
     if (eggsToHatchCount > 0) {
       if (eggsToHatchCount >= this.minEggsToSkip && this.scene.eggSkipPreference === 1) {
         this.scene.ui.showText(i18next.t("battle:eggHatching"), 0, () => {
-          // show prompt for skip
+          // show prompt for skip, blocking inputs for 1 second
           this.scene.ui.showText(i18next.t("battle:eggSkipPrompt"), 0);
           this.scene.ui.setModeWithoutClear(Mode.CONFIRM, () => {
             this.hatchEggsSkipped(eggsToHatch);
@@ -41,7 +41,8 @@ export class EggLapsePhase extends Phase {
           }, () => {
             this.hatchEggsRegular(eggsToHatch);
             this.end();
-          }
+          },
+          null, null, null, 1000, true
           );
         }, 100, true);
       } else if (eggsToHatchCount >= this.minEggsToSkip && this.scene.eggSkipPreference === 2) {

src/phases/egg-summary-phase.ts

@@ -1,7 +1,6 @@
 import BattleScene from "#app/battle-scene";
 import { Phase } from "#app/phase";
 import { Mode } from "#app/ui/ui";
-import EggHatchSceneHandler from "#app/ui/egg-hatch-scene-handler";
 import { EggHatchData } from "#app/data/egg-hatch-data";
 
 /**
@@ -11,7 +10,6 @@ import { EggHatchData } from "#app/data/egg-hatch-data";
  */
 export class EggSummaryPhase extends Phase {
   private eggHatchData: EggHatchData[];
-  private eggHatchHandler: EggHatchSceneHandler;
 
   constructor(scene: BattleScene, eggHatchData: EggHatchData[]) {
     super(scene);
@@ -26,7 +24,6 @@ export class EggSummaryPhase extends Phase {
       if (i >= this.eggHatchData.length) {
         this.scene.ui.setModeForceTransition(Mode.EGG_HATCH_SUMMARY, this.eggHatchData).then(() => {
           this.scene.fadeOutBgm(undefined, false);
-          this.eggHatchHandler = this.scene.ui.getHandler() as EggHatchSceneHandler;
         });
 
       } else {

src/phases/encounter-phase.ts

@@ -35,6 +35,7 @@ import { getEncounterText } from "#app/data/mystery-encounters/utils/encounter-d
 import { MysteryEncounterPhase } from "#app/phases/mystery-encounter-phases";
 import { getGoldenBugNetSpecies } from "#app/data/mystery-encounters/utils/encounter-pokemon-utils";
 import { Biome } from "#enums/biome";
+import { WEIGHT_INCREMENT_ON_SPAWN_MISS } from "#app/data/mystery-encounters/mystery-encounters";
 
 export class EncounterPhase extends BattlePhase {
   private loaded: boolean;
@@ -68,7 +69,7 @@ export class EncounterPhase extends BattlePhase {
       this.scene.executeWithSeedOffset(() => {
         const currentSessionEncounterType = battle.mysteryEncounterType;
         battle.mysteryEncounter = this.scene.getMysteryEncounter(currentSessionEncounterType);
-      }, battle.waveIndex << 4);
+      }, battle.waveIndex * 16);
     }
     const mysteryEncounter = battle.mysteryEncounter;
     if (mysteryEncounter) {
@@ -251,6 +252,13 @@ export class EncounterPhase extends BattlePhase {
         this.scene.updateModifiers(true);
       }*/
 
+    const { battleType, waveIndex } = this.scene.currentBattle;
+    if (this.scene.isMysteryEncounterValidForWave(battleType,  waveIndex) && !this.scene.currentBattle.isBattleMysteryEncounter()) {
+      // Increment ME spawn chance if an ME could have spawned but did not
+      // Only do this AFTER session has been saved to avoid duplicating increments
+      this.scene.mysteryEncounterSaveData.encounterSpawnChance += WEIGHT_INCREMENT_ON_SPAWN_MISS;
+    }
+
     for (const pokemon of this.scene.getParty()) {
       if (pokemon) {
         pokemon.resetBattleData();

src/phases/faint-phase.ts

@@ -1,12 +1,12 @@
 import BattleScene from "#app/battle-scene";
 import { BattlerIndex, BattleType } from "#app/battle";
 import { applyPostFaintAbAttrs, PostFaintAbAttr, applyPostKnockOutAbAttrs, PostKnockOutAbAttr, applyPostVictoryAbAttrs, PostVictoryAbAttr } from "#app/data/ability";
-import { BattlerTagLapseType } from "#app/data/battler-tags";
+import { BattlerTagLapseType, DestinyBondTag } from "#app/data/battler-tags";
 import { battleSpecDialogue } from "#app/data/dialogue";
 import { allMoves, PostVictoryStatStageChangeAttr } from "#app/data/move";
 import { BattleSpec } from "#app/enums/battle-spec";
 import { StatusEffect } from "#app/enums/status-effect";
-import { PokemonMove, EnemyPokemon, PlayerPokemon, HitResult } from "#app/field/pokemon";
+import Pokemon, { PokemonMove, EnemyPokemon, PlayerPokemon, HitResult } from "#app/field/pokemon";
 import { getPokemonNameWithAffix } from "#app/messages";
 import { PokemonInstantReviveModifier } from "#app/modifier/modifier";
 import i18next from "i18next";
@@ -19,19 +19,40 @@ import { SwitchPhase } from "./switch-phase";
 import { VictoryPhase } from "./victory-phase";
 import { SpeciesFormChangeActiveTrigger } from "#app/data/pokemon-forms";
 import { SwitchType } from "#enums/switch-type";
+import { isNullOrUndefined } from "#app/utils";
+import { FRIENDSHIP_LOSS_FROM_FAINT } from "#app/data/balance/starters";
 
 export class FaintPhase extends PokemonPhase {
+  /**
+   * Whether or not enduring (for this phase's purposes, Reviver Seed) should be prevented
+   */
   private preventEndure: boolean;
 
-  constructor(scene: BattleScene, battlerIndex: BattlerIndex, preventEndure?: boolean) {
+  /**
+   * Destiny Bond tag belonging to the currently fainting Pokemon, if applicable
+   */
+  private destinyTag?: DestinyBondTag;
+
+  /**
+   * The source Pokemon that dealt fatal damage and should get KO'd by Destiny Bond, if applicable
+   */
+  private source?: Pokemon;
+
+  constructor(scene: BattleScene, battlerIndex: BattlerIndex, preventEndure: boolean = false, destinyTag?: DestinyBondTag, source?: Pokemon) {
     super(scene, battlerIndex);
 
-    this.preventEndure = preventEndure!; // TODO: is this bang correct?
+    this.preventEndure = preventEndure;
+    this.destinyTag = destinyTag;
+    this.source = source;
   }
 
   start() {
     super.start();
 
+    if (!isNullOrUndefined(this.destinyTag) && !isNullOrUndefined(this.source)) {
+      this.destinyTag.lapse(this.source, BattlerTagLapseType.CUSTOM);
+    }
+
     if (!this.preventEndure) {
       const instantReviveModifier = this.scene.applyModifier(PokemonInstantReviveModifier, this.player, this.getPokemon()) as PokemonInstantReviveModifier;
 
@@ -127,7 +148,7 @@ export class FaintPhase extends PokemonPhase {
 
     pokemon.faintCry(() => {
       if (pokemon instanceof PlayerPokemon) {
-        pokemon.addFriendship(-10);
+        pokemon.addFriendship(-FRIENDSHIP_LOSS_FROM_FAINT);
       }
       pokemon.hideInfo();
       this.scene.playSound("se/faint");

src/phases/learn-move-phase.ts

@@ -2,24 +2,37 @@ import BattleScene from "#app/battle-scene";
 import { initMoveAnim, loadMoveAnimAssets } from "#app/data/battle-anims";
 import Move, { allMoves } from "#app/data/move";
 import { SpeciesFormChangeMoveLearnedTrigger } from "#app/data/pokemon-forms";
-import { Moves } from "#app/enums/moves";
+import { Moves } from "#enums/moves";
 import { getPokemonNameWithAffix } from "#app/messages";
+import Overrides from "#app/overrides";
 import EvolutionSceneHandler from "#app/ui/evolution-scene-handler";
 import { SummaryUiMode } from "#app/ui/summary-ui-handler";
 import { Mode } from "#app/ui/ui";
 import i18next from "i18next";
-import { PlayerPartyMemberPokemonPhase } from "./player-party-member-pokemon-phase";
+import { PlayerPartyMemberPokemonPhase } from "#app/phases/player-party-member-pokemon-phase";
 import Pokemon from "#app/field/pokemon";
+import { SelectModifierPhase } from "#app/phases/select-modifier-phase";
+
+export enum LearnMoveType {
+  /** For learning a move via level-up, evolution, or other non-item-based event */
+  LEARN_MOVE,
+  /** For learning a move via Memory Mushroom */
+  MEMORY,
+  /** For learning a move via TM */
+  TM
+}
 
 export class LearnMovePhase extends PlayerPartyMemberPokemonPhase {
   private moveId: Moves;
   private messageMode: Mode;
-  private fromTM: boolean;
+  private learnMoveType;
+  private cost: number;
 
-  constructor(scene: BattleScene, partyMemberIndex: integer, moveId: Moves, fromTM?: boolean) {
+  constructor(scene: BattleScene, partyMemberIndex: integer, moveId: Moves, learnMoveType: LearnMoveType = LearnMoveType.LEARN_MOVE, cost: number = -1) {
     super(scene, partyMemberIndex);
     this.moveId = moveId;
-    this.fromTM = fromTM ?? false;
+    this.learnMoveType = learnMoveType;
+    this.cost = cost;
   }
 
   start() {
@@ -136,22 +149,37 @@ export class LearnMovePhase extends PlayerPartyMemberPokemonPhase {
    * @param Pokemon The Pokemon learning the move
    */
   async learnMove(index: number, move: Move, pokemon: Pokemon, textMessage?: string) {
-    if (this.fromTM) {
+    if (this.learnMoveType === LearnMoveType.TM) {
       if (!pokemon.usedTMs) {
         pokemon.usedTMs = [];
       }
       pokemon.usedTMs.push(this.moveId);
+      this.scene.tryRemovePhase((phase) => phase instanceof SelectModifierPhase);
+    } else if (this.learnMoveType === LearnMoveType.MEMORY) {
+      if (this.cost !== -1) {
+        if (!Overrides.WAIVE_ROLL_FEE_OVERRIDE) {
+          this.scene.money -= this.cost;
+          this.scene.updateMoneyText();
+          this.scene.animateMoneyChanged(false);
+        }
+        this.scene.playSound("se/buy");
+      } else {
+        this.scene.tryRemovePhase((phase) => phase instanceof SelectModifierPhase);
+      }
     }
     pokemon.setMove(index, this.moveId);
     initMoveAnim(this.scene, this.moveId).then(() => {
       loadMoveAnimAssets(this.scene, [ this.moveId ], true);
-      this.scene.playSound("level_up_fanfare"); // Sound loaded into game as is
     });
     this.scene.ui.setMode(this.messageMode);
     const learnMoveText = i18next.t("battle:learnMove", { pokemonName: getPokemonNameWithAffix(pokemon), moveName: move.name });
-    textMessage = textMessage ? textMessage + "$" + learnMoveText : learnMoveText;
+    if (textMessage) {
-    await this.scene.ui.showTextPromise(textMessage, this.messageMode === Mode.EVOLUTION_SCENE ? 1000 : undefined, true);
+      await this.scene.ui.showTextPromise(textMessage);
+    }
+    this.scene.playSound("level_up_fanfare"); // Sound loaded into game as is
+    this.scene.ui.showText(learnMoveText, null, () => {
       this.scene.triggerPokemonFormChange(pokemon, SpeciesFormChangeMoveLearnedTrigger, true);
       this.end();
+    }, this.messageMode === Mode.EVOLUTION_SCENE ? 1000 : undefined, true);
   }
 }

src/phases/move-effect-phase.ts

@@ -99,8 +99,9 @@ export class MoveEffectPhase extends PokemonPhase {
       const targetHitChecks = Object.fromEntries(targets.map(p => [ p.getBattlerIndex(), this.hitCheck(p) ]));
       const hasActiveTargets = targets.some(t => t.isActive(true));
 
-      /** Check if the target is immune via ability to the attacking move */
+      /** Check if the target is immune via ability to the attacking move, and NOT in semi invulnerable state */
-      const isImmune = targets[0].hasAbilityWithAttr(TypeImmunityAbAttr) && (targets[0].getAbility()?.getAttrs(TypeImmunityAbAttr)?.[0]?.getImmuneType() === user.getMoveType(move));
+      const isImmune = targets[0].hasAbilityWithAttr(TypeImmunityAbAttr) && (targets[0].getAbility()?.getAttrs(TypeImmunityAbAttr)?.[0]?.getImmuneType() === user.getMoveType(move))
+          && !targets[0].getTag(SemiInvulnerableTag);
 
       /**
          * If no targets are left for the move to hit (FAIL), or the invoked move is single-target
@@ -140,7 +141,7 @@ export class MoveEffectPhase extends PokemonPhase {
           const bypassIgnoreProtect = new Utils.BooleanHolder(false);
           /** If the move is not targeting a Pokemon on the user's side, try to apply conditional protection effects */
           if (!this.move.getMove().isAllyTarget()) {
-            this.scene.arena.applyTagsForSide(ConditionalProtectTag, targetSide, hasConditionalProtectApplied, user, target, move.id, bypassIgnoreProtect);
+            this.scene.arena.applyTagsForSide(ConditionalProtectTag, targetSide, false, hasConditionalProtectApplied, user, target, move.id, bypassIgnoreProtect);
           }
 
           /** Is the target protected by Protect, etc. or a relevant conditional protection effect? */
@@ -148,8 +149,9 @@ export class MoveEffectPhase extends PokemonPhase {
               && (hasConditionalProtectApplied.value || (!target.findTags(t => t instanceof DamageProtectedTag).length && target.findTags(t => t instanceof ProtectedTag).find(t => target.lapseTag(t.tagType)))
               || (this.move.getMove().category !== MoveCategory.STATUS && target.findTags(t => t instanceof DamageProtectedTag).find(t => target.lapseTag(t.tagType))));
 
-          /** Is the pokemon immune due to an ablility?  */
+          /** Is the pokemon immune due to an ablility, and also not in a semi invulnerable state?  */
-          const isImmune = target.hasAbilityWithAttr(TypeImmunityAbAttr) && (target.getAbility()?.getAttrs(TypeImmunityAbAttr)?.[0]?.getImmuneType() === user.getMoveType(move));
+          const isImmune = target.hasAbilityWithAttr(TypeImmunityAbAttr) && (target.getAbility()?.getAttrs(TypeImmunityAbAttr)?.[0]?.getImmuneType() === user.getMoveType(move))
+              && !target.getTag(SemiInvulnerableTag);
 
           /**
              * If the move missed a target, stop all future hits against that target
@@ -278,10 +280,8 @@ export class MoveEffectPhase extends PokemonPhase {
                           if (!user.isPlayer() && this.move.getMove() instanceof AttackMove) {
                             user.scene.applyShuffledModifiers(this.scene, EnemyAttackStatusEffectChanceModifier, false, target);
                           }
-                          target.lapseTag(BattlerTagType.BEAK_BLAST_CHARGING);
+                          target.lapseTags(BattlerTagLapseType.AFTER_HIT);
-                          if (move.category === MoveCategory.PHYSICAL && user.isPlayer() !== target.isPlayer()) {
+
-                            target.lapseTag(BattlerTagType.SHELL_TRAP);
-                          }
                         })).then(() => {
                           // Apply the user's post-attack ability effects
                           applyPostAttackAbAttrs(PostAttackAbAttr, user, target, this.move.getMove(), hitResult).then(() => {

src/phases/move-phase.ts

@@ -1,6 +1,6 @@
 import { BattlerIndex } from "#app/battle";
 import BattleScene from "#app/battle-scene";
-import { applyAbAttrs, applyPostMoveUsedAbAttrs, applyPreAttackAbAttrs, BlockRedirectAbAttr, IncreasePpAbAttr, PokemonTypeChangeAbAttr, PostMoveUsedAbAttr, RedirectMoveAbAttr } from "#app/data/ability";
+import { applyAbAttrs, applyPostMoveUsedAbAttrs, applyPreAttackAbAttrs, BlockRedirectAbAttr, IncreasePpAbAttr, PokemonTypeChangeAbAttr, PostMoveUsedAbAttr, RedirectMoveAbAttr, ReduceStatusEffectDurationAbAttr } from "#app/data/ability";
 import { CommonAnim } from "#app/data/battle-anims";
 import { BattlerTagLapseType, CenterOfAttentionTag } from "#app/data/battler-tags";
 import { allMoves, applyMoveAttrs, BypassRedirectAttr, BypassSleepAttr, ChargeAttr, CopyMoveAttr, HealStatusEffectAttr, MoveFlags, PreMoveMessageAttr } from "#app/data/move";
@@ -128,7 +128,9 @@ export class MovePhase extends BattlePhase {
 
     this.lapsePreMoveAndMoveTags();
 
+    if (!(this.failed || this.cancelled)) {
       this.resolveFinalPreMoveCancellationChecks();
+    }
 
     if (this.cancelled || this.failed) {
       this.handlePreMoveFailures();
@@ -145,8 +147,9 @@ export class MovePhase extends BattlePhase {
     const moveQueue = this.pokemon.getMoveQueue();
 
     if (targets.length === 0 || (moveQueue.length && moveQueue[0].move === Moves.NONE)) {
+      this.showMoveText();
       this.showFailedText();
-      this.cancelled = true;
+      this.cancel();
     }
   }
 
@@ -172,7 +175,10 @@ export class MovePhase extends BattlePhase {
           break;
         case StatusEffect.SLEEP:
           applyMoveAttrs(BypassSleepAttr, this.pokemon, null, this.move.getMove());
-        healed = this.pokemon.status.turnCount === this.pokemon.status.cureTurn;
+          const turnsRemaining = new NumberHolder(this.pokemon.status.sleepTurnsRemaining ?? 0);
+          applyAbAttrs(ReduceStatusEffectDurationAbAttr, this.pokemon, null, false, this.pokemon.status.effect, turnsRemaining);
+          this.pokemon.status.sleepTurnsRemaining = turnsRemaining.value;
+          healed = this.pokemon.status.sleepTurnsRemaining <= 0;
           activated = !healed && !this.pokemon.getTag(BattlerTagType.BYPASS_SLEEP);
           this.cancelled = activated;
           break;

src/phases/mystery-encounter-phases.ts

@@ -402,7 +402,7 @@ export class MysteryEncounterBattlePhase extends Phase {
       }
     }
 
-    const availablePartyMembers = scene.getParty().filter(p => !p.isFainted());
+    const availablePartyMembers = scene.getParty().filter(p => p.isAllowedInBattle());
 
     if (!availablePartyMembers[0].isOnField()) {
       scene.pushPhase(new SummonPhase(scene, 0));

src/phases/obtain-status-effect-phase.ts

@@ -8,26 +8,26 @@ import { getPokemonNameWithAffix } from "#app/messages";
 import { PokemonPhase } from "./pokemon-phase";
 
 export class ObtainStatusEffectPhase extends PokemonPhase {
-  private statusEffect?: StatusEffect | undefined;
+  private statusEffect?: StatusEffect;
-  private cureTurn?: integer | null;
+  private turnsRemaining?: number;
   private sourceText?: string | null;
   private sourcePokemon?: Pokemon | null;
 
-  constructor(scene: BattleScene, battlerIndex: BattlerIndex, statusEffect?: StatusEffect, cureTurn?: integer | null, sourceText?: string | null, sourcePokemon?: Pokemon | null) {
+  constructor(scene: BattleScene, battlerIndex: BattlerIndex, statusEffect?: StatusEffect, turnsRemaining?: number, sourceText?: string | null, sourcePokemon?: Pokemon | null) {
     super(scene, battlerIndex);
 
     this.statusEffect = statusEffect;
-    this.cureTurn = cureTurn;
+    this.turnsRemaining = turnsRemaining;
     this.sourceText = sourceText;
-    this.sourcePokemon = sourcePokemon; // For tracking which Pokemon caused the status effect
+    this.sourcePokemon = sourcePokemon;
   }
 
   start() {
     const pokemon = this.getPokemon();
     if (pokemon && !pokemon.status) {
       if (pokemon.trySetStatus(this.statusEffect, false, this.sourcePokemon)) {
-        if (this.cureTurn) {
+        if (this.turnsRemaining) {
-          pokemon.status!.cureTurn = this.cureTurn; // TODO: is this bang correct?
+          pokemon.status!.sleepTurnsRemaining = this.turnsRemaining;
         }
         pokemon.updateInfo(true);
         new CommonBattleAnim(CommonAnim.POISON + (this.statusEffect! - 1), pokemon).play(this.scene, false, () => {

src/phases/outdated-phase.ts

@@ -1,13 +0,0 @@
-import BattleScene from "#app/battle-scene";
-import { Phase } from "#app/phase";
-import { Mode } from "#app/ui/ui";
-
-export class OutdatedPhase extends Phase {
-  constructor(scene: BattleScene) {
-    super(scene);
-  }
-
-  start(): void {
-    this.scene.ui.setMode(Mode.OUTDATED);
-  }
-}

src/phases/post-summon-phase.ts

@@ -18,9 +18,9 @@ export class PostSummonPhase extends PokemonPhase {
     const pokemon = this.getPokemon();
 
     if (pokemon.status?.effect === StatusEffect.TOXIC) {
-      pokemon.status.turnCount = 0;
+      pokemon.status.toxicTurnCount = 0;
     }
-    this.scene.arena.applyTags(ArenaTrapTag, pokemon);
+    this.scene.arena.applyTags(ArenaTrapTag, false, pokemon);
 
     // If this is mystery encounter and has post summon phase tag, apply post summon effects
     if (this.scene.currentBattle.isBattleMysteryEncounter() && pokemon.findTags(t => t instanceof MysteryEncounterPostSummonTag).length > 0) {

src/phases/post-turn-status-effect-phase.ts

@@ -30,7 +30,7 @@ export class PostTurnStatusEffectPhase extends PokemonPhase {
             damage.value = Math.max(pokemon.getMaxHp() >> 3, 1);
             break;
           case StatusEffect.TOXIC:
-          damage.value = Math.max(Math.floor((pokemon.getMaxHp() / 16) * pokemon.status.turnCount), 1);
+            damage.value = Math.max(Math.floor((pokemon.getMaxHp() / 16) * pokemon.status.toxicTurnCount), 1);
             break;
           case StatusEffect.BURN:
             damage.value = Math.max(pokemon.getMaxHp() >> 4, 1);

src/phases/select-modifier-phase.ts

@@ -16,26 +16,32 @@ export class SelectModifierPhase extends BattlePhase {
   private rerollCount: integer;
   private modifierTiers?: ModifierTier[];
   private customModifierSettings?: CustomModifierSettings;
+  private isCopy: boolean;
 
-  constructor(scene: BattleScene, rerollCount: integer = 0, modifierTiers?: ModifierTier[], customModifierSettings?: CustomModifierSettings) {
+  private typeOptions: ModifierTypeOption[];
+
+  constructor(scene: BattleScene, rerollCount: integer = 0, modifierTiers?: ModifierTier[], customModifierSettings?: CustomModifierSettings, isCopy: boolean = false) {
     super(scene);
 
     this.rerollCount = rerollCount;
     this.modifierTiers = modifierTiers;
     this.customModifierSettings = customModifierSettings;
+    this.isCopy = isCopy;
   }
 
   start() {
     super.start();
 
-    if (!this.rerollCount) {
+    if (!this.rerollCount && !this.isCopy) {
       this.updateSeed();
-    } else {
+    } else if (this.rerollCount) {
       this.scene.reroll = false;
     }
 
     const party = this.scene.getParty();
+    if (!this.isCopy) {
       regenerateModifierPoolThresholds(party, this.getPoolType(), this.rerollCount);
+    }
     const modifierCount = new Utils.IntegerHolder(3);
     if (this.isPlayer()) {
       this.scene.applyModifiers(ExtraModifierModifier, true, modifierCount);
@@ -54,7 +60,7 @@ export class SelectModifierPhase extends BattlePhase {
       }
     }
 
-    const typeOptions: ModifierTypeOption[] = this.getModifierTypeOptions(modifierCount.value);
+    this.typeOptions = this.getModifierTypeOptions(modifierCount.value);
 
     const modifierSelectCallback = (rowCursor: integer, cursor: integer) => {
       if (rowCursor < 0 || cursor < 0) {
@@ -63,13 +69,13 @@ export class SelectModifierPhase extends BattlePhase {
             this.scene.ui.revertMode();
             this.scene.ui.setMode(Mode.MESSAGE);
             super.end();
-          }, () => this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), typeOptions, modifierSelectCallback, this.getRerollCost(typeOptions, this.scene.lockModifierTiers)));
+          }, () => this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), this.typeOptions, modifierSelectCallback, this.getRerollCost(this.scene.lockModifierTiers)));
         });
         return false;
       }
       let modifierType: ModifierType;
       let cost: integer;
-      const rerollCost = this.getRerollCost(typeOptions, this.scene.lockModifierTiers);
+      const rerollCost = this.getRerollCost(this.scene.lockModifierTiers);
       switch (rowCursor) {
         case 0:
           switch (cursor) {
@@ -79,7 +85,7 @@ export class SelectModifierPhase extends BattlePhase {
                 return false;
               } else {
                 this.scene.reroll = true;
-            this.scene.unshiftPhase(new SelectModifierPhase(this.scene, this.rerollCount + 1, typeOptions.map(o => o.type?.tier).filter(t => t !== undefined) as ModifierTier[]));
+                this.scene.unshiftPhase(new SelectModifierPhase(this.scene, this.rerollCount + 1, this.typeOptions.map(o => o.type?.tier).filter(t => t !== undefined) as ModifierTier[]));
                 this.scene.ui.clearText();
                 this.scene.ui.setMode(Mode.MESSAGE).then(() => super.end());
                 if (!Overrides.WAIVE_ROLL_FEE_OVERRIDE) {
@@ -98,13 +104,13 @@ export class SelectModifierPhase extends BattlePhase {
                   const itemModifier = itemModifiers[itemIndex];
                   this.scene.tryTransferHeldItemModifier(itemModifier, party[toSlotIndex], true, itemQuantity);
                 } else {
-              this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), typeOptions, modifierSelectCallback, this.getRerollCost(typeOptions, this.scene.lockModifierTiers));
+                  this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), this.typeOptions, modifierSelectCallback, this.getRerollCost(this.scene.lockModifierTiers));
                 }
               }, PartyUiHandler.FilterItemMaxStacks);
               break;
             case 2:
               this.scene.ui.setModeWithoutClear(Mode.PARTY, PartyUiMode.CHECK, -1, () => {
-            this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), typeOptions, modifierSelectCallback, this.getRerollCost(typeOptions, this.scene.lockModifierTiers));
+                this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), this.typeOptions, modifierSelectCallback, this.getRerollCost(this.scene.lockModifierTiers));
               });
               break;
             case 3:
@@ -115,21 +121,21 @@ export class SelectModifierPhase extends BattlePhase {
               }
               this.scene.lockModifierTiers = !this.scene.lockModifierTiers;
               const uiHandler = this.scene.ui.getHandler() as ModifierSelectUiHandler;
-          uiHandler.setRerollCost(this.getRerollCost(typeOptions, this.scene.lockModifierTiers));
+              uiHandler.setRerollCost(this.getRerollCost(this.scene.lockModifierTiers));
               uiHandler.updateLockRaritiesText();
               uiHandler.updateRerollCostText();
               return false;
           }
           return true;
         case 1:
-        if (typeOptions.length === 0) {
+          if (this.typeOptions.length === 0) {
             this.scene.ui.clearText();
             this.scene.ui.setMode(Mode.MESSAGE);
             super.end();
             return true;
           }
-        if (typeOptions[cursor].type) {
+          if (this.typeOptions[cursor].type) {
-          modifierType = typeOptions[cursor].type;
+            modifierType = this.typeOptions[cursor].type;
           }
           break;
         default:
@@ -151,8 +157,16 @@ export class SelectModifierPhase extends BattlePhase {
       }
 
       const applyModifier = (modifier: Modifier, playSound: boolean = false) => {
-        const result = this.scene.addModifier(modifier, false, playSound);
+        const result = this.scene.addModifier(modifier, false, playSound, undefined, undefined, cost);
-        if (cost) {
+        // Queue a copy of this phase when applying a TM or Memory Mushroom.
+        // If the player selects either of these, then escapes out of consuming them,
+        // they are returned to a shop in the same state.
+        if (modifier.type instanceof RememberMoveModifierType ||
+            modifier.type instanceof TmModifierType) {
+          this.scene.unshiftPhase(this.copy());
+        }
+
+        if (cost && !(modifier.type instanceof RememberMoveModifierType)) {
           result.then(success => {
             if (success) {
               if (!Overrides.WAIVE_ROLL_FEE_OVERRIDE) {
@@ -189,7 +203,7 @@ export class SelectModifierPhase extends BattlePhase {
                 applyModifier(modifier, true);
               });
             } else {
-              this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), typeOptions, modifierSelectCallback, this.getRerollCost(typeOptions, this.scene.lockModifierTiers));
+              this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), this.typeOptions, modifierSelectCallback, this.getRerollCost(this.scene.lockModifierTiers));
             }
           }, modifierType.selectFilter);
         } else {
@@ -216,7 +230,7 @@ export class SelectModifierPhase extends BattlePhase {
                 applyModifier(modifier!, true); // TODO: is the bang correct?
               });
             } else {
-              this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), typeOptions, modifierSelectCallback, this.getRerollCost(typeOptions, this.scene.lockModifierTiers));
+              this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), this.typeOptions, modifierSelectCallback, this.getRerollCost(this.scene.lockModifierTiers));
             }
           }, pokemonModifierType.selectFilter, modifierType instanceof PokemonMoveModifierType ? (modifierType as PokemonMoveModifierType).moveSelectFilter : undefined, tmMoveId, isPpRestoreModifier);
         }
@@ -226,7 +240,7 @@ export class SelectModifierPhase extends BattlePhase {
 
       return !cost!;// TODO: is the bang correct?
     };
-    this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), typeOptions, modifierSelectCallback, this.getRerollCost(typeOptions, this.scene.lockModifierTiers));
+    this.scene.ui.setMode(Mode.MODIFIER_SELECT, this.isPlayer(), this.typeOptions, modifierSelectCallback, this.getRerollCost(this.scene.lockModifierTiers));
   }
 
   updateSeed(): void {
@@ -237,13 +251,13 @@ export class SelectModifierPhase extends BattlePhase {
     return true;
   }
 
-  getRerollCost(typeOptions: ModifierTypeOption[], lockRarities: boolean): number {
+  getRerollCost(lockRarities: boolean): number {
     let baseValue = 0;
     if (Overrides.WAIVE_ROLL_FEE_OVERRIDE) {
       return baseValue;
     } else if (lockRarities) {
       const tierValues = [ 50, 125, 300, 750, 2000 ];
-      for (const opt of typeOptions) {
+      for (const opt of this.typeOptions) {
         baseValue += tierValues[opt.type.tier ?? 0];
       }
     } else {
@@ -271,6 +285,16 @@ export class SelectModifierPhase extends BattlePhase {
     return getPlayerModifierTypeOptions(modifierCount, this.scene.getParty(), this.scene.lockModifierTiers ? this.modifierTiers : undefined, this.customModifierSettings);
   }
 
+  copy(): SelectModifierPhase {
+    return new SelectModifierPhase(
+      this.scene,
+      this.rerollCount,
+      this.modifierTiers,
+      { guaranteedModifierTypeOptions: this.typeOptions, rerollMultiplier: this.customModifierSettings?.rerollMultiplier, allowLuckUpgrades: false },
+      true
+    );
+  }
+
   addModifier(modifier: Modifier): Promise<boolean> {
     return this.scene.addModifier(modifier, false, true);
   }

src/phases/stat-stage-change-phase.ts

@@ -64,8 +64,8 @@ export class StatStageChangePhase extends PokemonPhase {
       const cancelled = new BooleanHolder(false);
 
       if (!this.selfTarget && stages.value < 0) {
-        // TODO: Include simulate boolean when tag applications can be simulated
+        // TODO: add a reference to the source of the stat change to fix Infiltrator interaction
-        this.scene.arena.applyTagsForSide(MistTag, pokemon.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY, cancelled);
+        this.scene.arena.applyTagsForSide(MistTag, pokemon.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY, false, null, false, cancelled);
       }
 
       if (!cancelled.value && !this.selfTarget && stages.value < 0) {

src/phases/turn-start-phase.ts

@@ -45,7 +45,7 @@ export class TurnStartPhase extends FieldPhase {
 
     // Next, a check for Trick Room is applied to determine sort order.
     const speedReversed = new Utils.BooleanHolder(false);
-    this.scene.arena.applyTags(TrickRoomTag, speedReversed);
+    this.scene.arena.applyTags(TrickRoomTag, false, speedReversed);
 
     // Adjust the sort function based on whether Trick Room is active.
     orderedTargets.sort((a: Pokemon, b: Pokemon) => {

src/system/game-data.ts

@@ -43,10 +43,9 @@ import { Species } from "#enums/species";
 import { applyChallenges, ChallengeType } from "#app/data/challenge";
 import { WeatherType } from "#enums/weather-type";
 import { TerrainType } from "#app/data/terrain";
-import { OutdatedPhase } from "#app/phases/outdated-phase";
 import { ReloadSessionPhase } from "#app/phases/reload-session-phase";
 import { RUN_HISTORY_LIMIT } from "#app/ui/run-history-ui-handler";
-import { applySessionDataPatches, applySettingsDataPatches, applySystemDataPatches } from "#app/system/version-converter";
+import { applySessionVersionMigration, applySystemVersionMigration, applySettingsVersionMigration } from "./version_migration/version_converter";
 import { MysteryEncounterSaveData } from "#app/data/mystery-encounters/mystery-encounter-save-data";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { PokerogueApiClearSessionData } from "#app/@types/pokerogue-api";
@@ -403,10 +402,7 @@ export class GameData {
           .then(error => {
             this.scene.ui.savingIcon.hide();
             if (error) {
-              if (error.startsWith("client version out of date")) {
+              if (error.startsWith("session out of date")) {
-                this.scene.clearPhaseQueue();
-                this.scene.unshiftPhase(new OutdatedPhase(this.scene));
-              } else if (error.startsWith("session out of date")) {
                 this.scene.clearPhaseQueue();
                 this.scene.unshiftPhase(new ReloadSessionPhase(this.scene));
               }
@@ -482,7 +478,7 @@ export class GameData {
           localStorage.setItem(lsItemKey, "");
         }
 
-        applySystemDataPatches(systemData);
+        applySystemVersionMigration(systemData);
 
         this.trainerId = systemData.trainerId;
         this.secretId = systemData.secretId;
@@ -857,7 +853,7 @@ export class GameData {
 
     const settings = JSON.parse(localStorage.getItem("settings")!); // TODO: is this bang correct?
 
-    applySettingsDataPatches(settings);
+    applySettingsVersionMigration(settings);
 
     for (const setting of Object.keys(settings)) {
       setSetting(this.scene, setting, settings[setting]);
@@ -1313,7 +1309,7 @@ export class GameData {
       return v;
     }) as SessionSaveData;
 
-    applySessionDataPatches(sessionData);
+    applySessionVersionMigration(sessionData);
 
     return sessionData;
   }
@@ -1354,10 +1350,7 @@ export class GameData {
                 this.scene.ui.savingIcon.hide();
               }
               if (error) {
-                if (error.startsWith("client version out of date")) {
+                if (error.startsWith("session out of date")) {
-                  this.scene.clearPhaseQueue();
-                  this.scene.unshiftPhase(new OutdatedPhase(this.scene));
-                } else if (error.startsWith("session out of date")) {
                   this.scene.clearPhaseQueue();
                   this.scene.unshiftPhase(new ReloadSessionPhase(this.scene));
                 }

src/system/pokemon-data.ts

@@ -12,7 +12,7 @@ import { loadBattlerTag } from "../data/battler-tags";
 import { Biome } from "#enums/biome";
 import { Moves } from "#enums/moves";
 import { Species } from "#enums/species";
-import { MysteryEncounterPokemonData } from "#app/data/mystery-encounters/mystery-encounter-pokemon-data";
+import { CustomPokemonData } from "#app/data/custom-pokemon-data";
 
 export default class PokemonData {
   public id: integer;
@@ -33,7 +33,6 @@ export default class PokemonData {
   public stats: integer[];
   public ivs: integer[];
   public nature: Nature;
-  public natureOverride: Nature | -1;
   public moveset: (PokemonMove | null)[];
   public status: Status | null;
   public friendship: integer;
@@ -54,14 +53,20 @@ export default class PokemonData {
   public fusionVariant: Variant;
   public fusionGender: Gender;
   public fusionLuck: integer;
-  public fusionMysteryEncounterPokemonData: MysteryEncounterPokemonData;
 
   public boss: boolean;
   public bossSegments?: integer;
 
   public summonData: PokemonSummonData;
+
   /** Data that can customize a Pokemon in non-standard ways from its Species */
-  public mysteryEncounterPokemonData: MysteryEncounterPokemonData;
+  public customPokemonData: CustomPokemonData;
+  public fusionCustomPokemonData: CustomPokemonData;
+
+  // Deprecated attributes, needed for now to allow SessionData migration (see PR#4619 comments)
+  public natureOverride: Nature | -1;
+  public mysteryEncounterPokemonData: CustomPokemonData | null;
+  public fusionMysteryEncounterPokemonData: CustomPokemonData | null;
 
   constructor(source: Pokemon | any, forHistory: boolean = false) {
     const sourcePokemon = source instanceof Pokemon ? source : null;
@@ -107,9 +112,13 @@ export default class PokemonData {
     this.fusionVariant = source.fusionVariant;
     this.fusionGender = source.fusionGender;
     this.fusionLuck = source.fusionLuck !== undefined ? source.fusionLuck : (source.fusionShiny ? source.fusionVariant + 1 : 0);
+    this.fusionCustomPokemonData = new CustomPokemonData(source.fusionCustomPokemonData);
     this.usedTMs = source.usedTMs ?? [];
 
-    this.mysteryEncounterPokemonData = new MysteryEncounterPokemonData(source.mysteryEncounterPokemonData);
+    this.customPokemonData = new CustomPokemonData(source.customPokemonData);
+
+    this.mysteryEncounterPokemonData = new CustomPokemonData(source.mysteryEncounterPokemonData);
+    this.fusionMysteryEncounterPokemonData = new CustomPokemonData(source.fusionMysteryEncounterPokemonData);
 
     if (!forHistory) {
       this.boss = (source instanceof EnemyPokemon && !!source.bossSegments) || (!this.player && !!source.boss);
@@ -128,7 +137,7 @@ export default class PokemonData {
       this.moveset = (source.moveset || [ new PokemonMove(Moves.TACKLE), new PokemonMove(Moves.GROWL) ]).filter(m => m).map((m: any) => new PokemonMove(m.moveId, m.ppUsed, m.ppUp));
       if (!forHistory) {
         this.status = source.status
-          ? new Status(source.status.effect, source.status.turnCount, source.status.cureTurn)
+          ? new Status(source.status.effect, source.status.toxicTurnCount, source.status.sleepTurnsRemaining)
           : null;
       }
 

src/system/version-converter.ts

@@ -1,157 +0,0 @@
-import { allSpecies } from "#app/data/pokemon-species";
-import { AbilityAttr, defaultStarterSpecies, DexAttr, SessionSaveData, SystemSaveData } from "./game-data";
-import { SettingKeys } from "./settings/settings";
-
-const LATEST_VERSION = "1.0.5";
-
-export function applySessionDataPatches(data: SessionSaveData) {
-  const curVersion = data.gameVersion;
-
-  // Always sanitize money as a safeguard
-  data.money = Math.floor(data.money);
-
-  if (curVersion !== LATEST_VERSION) {
-    switch (curVersion) {
-    case "1.0.0":
-    case "1.0.1":
-    case "1.0.2":
-    case "1.0.3":
-    case "1.0.4":
-      // --- PATCHES ---
-
-      // Fix Battle Items, Vitamins, and Lures
-      data.modifiers.forEach((m) => {
-        if (m.className === "PokemonBaseStatModifier") {
-          m.className = "BaseStatModifier";
-        } else if (m.className === "PokemonResetNegativeStatStageModifier") {
-          m.className = "ResetNegativeStatStageModifier";
-        } else if (m.className === "TempBattleStatBoosterModifier") {
-          // Dire Hit no longer a part of the TempBattleStatBoosterModifierTypeGenerator
-          if (m.typeId !== "DIRE_HIT") {
-            m.className = "TempStatStageBoosterModifier";
-            m.typeId = "TEMP_STAT_STAGE_BOOSTER";
-
-            // Migration from TempBattleStat to Stat
-            const newStat = m.typePregenArgs[0] + 1;
-            m.typePregenArgs[0] = newStat;
-
-            // From [ stat, battlesLeft ] to [ stat, maxBattles, battleCount ]
-            m.args = [ newStat, 5, m.args[1] ];
-          } else {
-            m.className = "TempCritBoosterModifier";
-            m.typePregenArgs = [];
-
-            // From [ stat, battlesLeft ] to [ maxBattles, battleCount ]
-            m.args = [ 5, m.args[1] ];
-          }
-
-        } else if (m.className === "DoubleBattleChanceBoosterModifier" && m.args.length === 1) {
-          let maxBattles: number;
-          switch (m.typeId) {
-          case "MAX_LURE":
-            maxBattles = 30;
-            break;
-          case "SUPER_LURE":
-            maxBattles = 15;
-            break;
-          default:
-            maxBattles = 10;
-            break;
-          }
-
-          // From [ battlesLeft ] to [ maxBattles, battleCount ]
-          m.args = [ maxBattles, m.args[0] ];
-        }
-      });
-
-      data.enemyModifiers.forEach((m) => {
-        if (m.className === "PokemonBaseStatModifier") {
-          m.className = "BaseStatModifier";
-        } else if (m.className === "PokemonResetNegativeStatStageModifier") {
-          m.className = "ResetNegativeStatStageModifier";
-        }
-      });
-    }
-
-    data.gameVersion = LATEST_VERSION;
-  }
-}
-
-export function applySystemDataPatches(data: SystemSaveData) {
-  const curVersion = data.gameVersion;
-  if (curVersion !== LATEST_VERSION) {
-    switch (curVersion) {
-    case "1.0.0":
-    case "1.0.1":
-    case "1.0.2":
-    case "1.0.3":
-    case "1.0.4":
-      // --- LEGACY PATCHES ---
-      if (data.starterData && data.dexData) {
-        // Migrate ability starter data if empty for caught species
-        Object.keys(data.starterData).forEach(sd => {
-          if (data.dexData[sd]?.caughtAttr && (data.starterData[sd] && !data.starterData[sd].abilityAttr)) {
-            data.starterData[sd].abilityAttr = 1;
-          }
-        });
-      }
-
-      // Fix Legendary Stats
-      if (data.gameStats && (data.gameStats.legendaryPokemonCaught !== undefined && data.gameStats.subLegendaryPokemonCaught === undefined)) {
-        data.gameStats.subLegendaryPokemonSeen = 0;
-        data.gameStats.subLegendaryPokemonCaught = 0;
-        data.gameStats.subLegendaryPokemonHatched = 0;
-        allSpecies.filter(s => s.subLegendary).forEach(s => {
-          const dexEntry = data.dexData[s.speciesId];
-          data.gameStats.subLegendaryPokemonSeen += dexEntry.seenCount;
-          data.gameStats.legendaryPokemonSeen = Math.max(data.gameStats.legendaryPokemonSeen - dexEntry.seenCount, 0);
-          data.gameStats.subLegendaryPokemonCaught += dexEntry.caughtCount;
-          data.gameStats.legendaryPokemonCaught = Math.max(data.gameStats.legendaryPokemonCaught - dexEntry.caughtCount, 0);
-          data.gameStats.subLegendaryPokemonHatched += dexEntry.hatchedCount;
-          data.gameStats.legendaryPokemonHatched = Math.max(data.gameStats.legendaryPokemonHatched - dexEntry.hatchedCount, 0);
-        });
-        data.gameStats.subLegendaryPokemonSeen = Math.max(data.gameStats.subLegendaryPokemonSeen, data.gameStats.subLegendaryPokemonCaught);
-        data.gameStats.legendaryPokemonSeen = Math.max(data.gameStats.legendaryPokemonSeen, data.gameStats.legendaryPokemonCaught);
-        data.gameStats.mythicalPokemonSeen = Math.max(data.gameStats.mythicalPokemonSeen, data.gameStats.mythicalPokemonCaught);
-      }
-
-      // --- PATCHES ---
-
-      // Fix Starter Data
-      if (data.starterData && data.dexData) {
-        for (const starterId of defaultStarterSpecies) {
-          if (data.starterData[starterId]?.abilityAttr) {
-            data.starterData[starterId].abilityAttr |= AbilityAttr.ABILITY_1;
-          }
-          if (data.dexData[starterId]?.caughtAttr) {
-            data.dexData[starterId].caughtAttr |= DexAttr.FEMALE;
-          }
-        }
-      }
-    }
-
-    data.gameVersion = LATEST_VERSION;
-  }
-}
-
-export function applySettingsDataPatches(settings: Object) {
-  const curVersion = settings.hasOwnProperty("gameVersion") ? settings["gameVersion"] : "1.0.0";
-  if (curVersion !== LATEST_VERSION) {
-    switch (curVersion) {
-    case "1.0.0":
-    case "1.0.1":
-    case "1.0.2":
-    case "1.0.3":
-    case "1.0.4":
-      // --- PATCHES ---
-
-      // Fix Reward Cursor Target
-      if (settings.hasOwnProperty("REROLL_TARGET") && !settings.hasOwnProperty(SettingKeys.Shop_Cursor_Target)) {
-        settings[SettingKeys.Shop_Cursor_Target] = settings["REROLL_TARGET"];
-        delete settings["REROLL_TARGET"];
-        localStorage.setItem("settings", JSON.stringify(settings));
-      }
-    }
-    // Note that the current game version will be written at `saveSettings`
-  }
-}

src/system/version_migration/version_converter.ts

@@ -0,0 +1,197 @@
+import { SessionSaveData, SystemSaveData } from "../game-data";
+import { version } from "../../../package.json";
+
+// --- v1.0.4 (and below) PATCHES --- //
+import * as v1_0_4 from "./versions/v1_0_4";
+
+// --- v1.1.0 PATCHES --- //
+import * as v1_1_0 from "./versions/v1_1_0";
+
+const LATEST_VERSION = version.split(".").map(value => parseInt(value));
+
+/**
+ * Converts incoming {@linkcode SystemSaveData} that has a version below the
+ * current version number listed in `package.json`.
+ *
+ * Note that no transforms act on the {@linkcode data} if its version matches
+ * the current version or if there are no migrations made between its version up
+ * to the current version.
+ * @param data {@linkcode SystemSaveData}
+ * @see {@link SystemVersionConverter}
+ */
+export function applySystemVersionMigration(data: SystemSaveData) {
+  const curVersion = data.gameVersion.split(".").map(value => parseInt(value));
+
+  if (!curVersion.every((value, index) => value === LATEST_VERSION[index])) {
+    const converter = new SystemVersionConverter();
+    converter.applyStaticPreprocessors(data);
+    converter.applyMigration(data, curVersion);
+  }
+}
+
+/**
+ * Converts incoming {@linkcode SessionSavaData} that has a version below the
+ * current version number listed in `package.json`.
+ *
+ * Note that no transforms act on the {@linkcode data} if its version matches
+ * the current version or if there are no migrations made between its version up
+ * to the current version.
+ * @param data {@linkcode SessionSaveData}
+ * @see {@link SessionVersionConverter}
+ */
+export function applySessionVersionMigration(data: SessionSaveData) {
+  const curVersion = data.gameVersion.split(".").map(value => parseInt(value));
+
+  if (!curVersion.every((value, index) => value === LATEST_VERSION[index])) {
+    const converter = new SessionVersionConverter();
+    converter.applyStaticPreprocessors(data);
+    converter.applyMigration(data, curVersion);
+  }
+}
+
+/**
+ * Converts incoming settings data that has a version below the
+ * current version number listed in `package.json`.
+ *
+ * Note that no transforms act on the {@linkcode data} if its version matches
+ * the current version or if there are no migrations made between its version up
+ * to the current version.
+ * @param data Settings data object
+ * @see {@link SettingsVersionConverter}
+ */
+export function applySettingsVersionMigration(data: Object) {
+  const gameVersion: string = data.hasOwnProperty("gameVersion") ? data["gameVersion"] : "1.0.0";
+  const curVersion = gameVersion.split(".").map(value => parseInt(value));
+
+  if (!curVersion.every((value, index) => value === LATEST_VERSION[index])) {
+    const converter = new SettingsVersionConverter();
+    converter.applyStaticPreprocessors(data);
+    converter.applyMigration(data, curVersion);
+  }
+}
+
+/**
+ * Abstract class encapsulating the logic for migrating data from a given version up to
+ * the current version listed in `package.json`.
+ *
+ * Note that, for any version converter, the corresponding `applyMigration`
+ * function would only need to be changed once when the first migration for a
+ * given version is introduced. Similarly, a version file (within the `versions`
+ * folder) would only need to be created for a version once with the appropriate
+ * array nomenclature.
+ */
+abstract class VersionConverter {
+  /**
+   * Iterates through an array of designated migration functions that are each
+   * called one by one to transform the data.
+   * @param data The data to be operated on
+   * @param migrationArr An array of functions that will transform the incoming data
+   */
+  callMigrators(data: any, migrationArr: readonly any[]) {
+    for (const migrate of migrationArr) {
+      migrate(data);
+    }
+  }
+
+  /**
+   * Applies any version-agnostic data sanitation as defined within the function
+   * body.
+   * @param data The data to be operated on
+   */
+  applyStaticPreprocessors(_data: any): void {
+  }
+
+  /**
+   * Uses the current version the incoming data to determine the starting point
+   * of the migration which will cascade up to the latest version, calling the
+   * necessary migration functions in the process.
+   * @param data The data to be operated on
+   * @param curVersion [0] Current major version
+   *                   [1] Current minor version
+   *                   [2] Current patch version
+   */
+  abstract applyMigration(data: any, curVersion: number[]): void;
+}
+
+/**
+ * Class encapsulating the logic for migrating {@linkcode SessionSaveData} from
+ * a given version up to the current version listed in `package.json`.
+ * @extends VersionConverter
+ */
+class SessionVersionConverter extends VersionConverter {
+  override applyStaticPreprocessors(data: SessionSaveData): void {
+    // Always sanitize money as a safeguard
+    data.money = Math.floor(data.money);
+  }
+
+  override applyMigration(data: SessionSaveData, curVersion: number[]): void {
+    const [ curMajor, curMinor, curPatch ] = curVersion;
+
+    if (curMajor === 1) {
+      if (curMinor === 0) {
+        if (curPatch <= 4) {
+          console.log("Applying v1.0.4 session data migration!");
+          this.callMigrators(data, v1_0_4.sessionMigrators);
+        }
+      }
+      if (curMinor <= 1) {
+        console.log("Applying v1.1.0 session data migration!");
+        this.callMigrators(data, v1_1_0.sessionMigrators);
+      }
+    }
+
+    console.log(`Session data successfully migrated to v${version}!`);
+  }
+}
+
+/**
+ * Class encapsulating the logic for migrating {@linkcode SystemSaveData} from
+ * a given version up to the current version listed in `package.json`.
+ * @extends VersionConverter
+ */
+class SystemVersionConverter extends VersionConverter {
+  override applyMigration(data: SystemSaveData, curVersion: number[]): void {
+    const [ curMajor, curMinor, curPatch ] = curVersion;
+
+    if (curMajor === 1) {
+      if (curMinor === 0) {
+        if (curPatch <= 4) {
+          console.log("Applying v1.0.4 system data migraton!");
+          this.callMigrators(data, v1_0_4.systemMigrators);
+        }
+      }
+      if (curMinor <= 1) {
+        console.log("Applying v1.1.0 system data migraton!");
+        this.callMigrators(data, v1_1_0.systemMigrators);
+      }
+    }
+
+    console.log(`System data successfully migrated to v${version}!`);
+  }
+}
+
+/**
+ * Class encapsulating the logic for migrating settings data from
+ * a given version up to the current version listed in `package.json`.
+ * @extends VersionConverter
+ */
+class SettingsVersionConverter extends VersionConverter {
+  override applyMigration(data: Object, curVersion: number[]): void {
+    const [ curMajor, curMinor, curPatch ] = curVersion;
+
+    if (curMajor === 1) {
+      if (curMinor === 0) {
+        if (curPatch <= 4) {
+          console.log("Applying v1.0.4 settings data migraton!");
+          this.callMigrators(data, v1_0_4.settingsMigrators);
+        }
+      }
+      if (curMinor <= 1) {
+        console.log("Applying v1.1.0 settings data migraton!");
+        this.callMigrators(data, v1_1_0.settingsMigrators);
+      }
+    }
+
+    console.log(`System data successfully migrated to v${version}!`);
+  }
+}

src/system/version_migration/versions/v1_0_4.ts

@@ -0,0 +1,135 @@
+import { SettingKeys } from "../../settings/settings";
+import { AbilityAttr, defaultStarterSpecies, DexAttr, SystemSaveData, SessionSaveData  } from "../../game-data";
+import { allSpecies } from "../../../data/pokemon-species";
+
+export const systemMigrators = [
+  /**
+   * Migrate ability starter data if empty for caught species.
+   * @param data {@linkcode SystemSaveData}
+   */
+  function migrateAbilityData(data: SystemSaveData) {
+    if (data.starterData && data.dexData) {
+      Object.keys(data.starterData).forEach(sd => {
+        if (data.dexData[sd]?.caughtAttr && (data.starterData[sd] && !data.starterData[sd].abilityAttr)) {
+          data.starterData[sd].abilityAttr = 1;
+        }
+      });
+    }
+  },
+
+  /**
+   * Populate legendary Pokémon statistics if they are missing.
+   * @param data {@linkcode SystemSaveData}
+   */
+  function fixLegendaryStats(data: SystemSaveData) {
+    if (data.gameStats && (data.gameStats.legendaryPokemonCaught !== undefined && data.gameStats.subLegendaryPokemonCaught === undefined)) {
+      data.gameStats.subLegendaryPokemonSeen = 0;
+      data.gameStats.subLegendaryPokemonCaught = 0;
+      data.gameStats.subLegendaryPokemonHatched = 0;
+      allSpecies.filter(s => s.subLegendary).forEach(s => {
+        const dexEntry = data.dexData[s.speciesId];
+        data.gameStats.subLegendaryPokemonSeen += dexEntry.seenCount;
+        data.gameStats.legendaryPokemonSeen = Math.max(data.gameStats.legendaryPokemonSeen - dexEntry.seenCount, 0);
+        data.gameStats.subLegendaryPokemonCaught += dexEntry.caughtCount;
+        data.gameStats.legendaryPokemonCaught = Math.max(data.gameStats.legendaryPokemonCaught - dexEntry.caughtCount, 0);
+        data.gameStats.subLegendaryPokemonHatched += dexEntry.hatchedCount;
+        data.gameStats.legendaryPokemonHatched = Math.max(data.gameStats.legendaryPokemonHatched - dexEntry.hatchedCount, 0);
+      });
+      data.gameStats.subLegendaryPokemonSeen = Math.max(data.gameStats.subLegendaryPokemonSeen, data.gameStats.subLegendaryPokemonCaught);
+      data.gameStats.legendaryPokemonSeen = Math.max(data.gameStats.legendaryPokemonSeen, data.gameStats.legendaryPokemonCaught);
+      data.gameStats.mythicalPokemonSeen = Math.max(data.gameStats.mythicalPokemonSeen, data.gameStats.mythicalPokemonCaught);
+    }
+  },
+
+  /**
+   * Unlock all starters' first ability and female gender option.
+   * @param data {@linkcode SystemSaveData}
+   */
+  function fixStarterData(data: SystemSaveData) {
+    for (const starterId of defaultStarterSpecies) {
+      if (data.starterData[starterId]?.abilityAttr) {
+        data.starterData[starterId].abilityAttr |= AbilityAttr.ABILITY_1;
+      }
+      if (data.dexData[starterId]?.caughtAttr) {
+        data.dexData[starterId].caughtAttr |= DexAttr.FEMALE;
+      }
+    }
+  }
+] as const;
+
+export const settingsMigrators = [
+  /**
+   * Migrate from "REROLL_TARGET" property to {@linkcode
+   * SettingKeys.Shop_Cursor_Target}.
+   * @param data the `settings` object
+   */
+  function fixRerollTarget(data: Object) {
+    if (data.hasOwnProperty("REROLL_TARGET") && !data.hasOwnProperty(SettingKeys.Shop_Cursor_Target)) {
+      data[SettingKeys.Shop_Cursor_Target] = data["REROLL_TARGET"];
+      delete data["REROLL_TARGET"];
+      localStorage.setItem("settings", JSON.stringify(data));
+    }
+  }
+] as const;
+
+export const sessionMigrators = [
+  /**
+   *  Converts old lapsing modifiers (battle items, lures, and Dire Hit) and
+   *  other miscellaneous modifiers (vitamins, White Herb) to any new class
+   *  names and/or change in reload arguments.
+   *  @param data {@linkcode SessionSaveData}
+   */
+  function migrateModifiers(data: SessionSaveData) {
+    data.modifiers.forEach((m) => {
+      if (m.className === "PokemonBaseStatModifier") {
+        m.className = "BaseStatModifier";
+      } else if (m.className === "PokemonResetNegativeStatStageModifier") {
+        m.className = "ResetNegativeStatStageModifier";
+      } else if (m.className === "TempBattleStatBoosterModifier") {
+        const maxBattles = 5;
+        // Dire Hit no longer a part of the TempBattleStatBoosterModifierTypeGenerator
+        if (m.typeId !== "DIRE_HIT") {
+          m.className = "TempStatStageBoosterModifier";
+          m.typeId = "TEMP_STAT_STAGE_BOOSTER";
+
+          // Migration from TempBattleStat to Stat
+          const newStat = m.typePregenArgs[0] + 1;
+          m.typePregenArgs[0] = newStat;
+
+          // From [ stat, battlesLeft ] to [ stat, maxBattles, battleCount ]
+          m.args = [ newStat, maxBattles, Math.min(m.args[1], maxBattles) ];
+        } else {
+          m.className = "TempCritBoosterModifier";
+          m.typePregenArgs = [];
+
+          // From [ stat, battlesLeft ] to [ maxBattles, battleCount ]
+          m.args = [ maxBattles, Math.min(m.args[1], maxBattles) ];
+        }
+      } else if (m.className === "DoubleBattleChanceBoosterModifier" && m.args.length === 1) {
+        let maxBattles: number;
+        switch (m.typeId) {
+          case "MAX_LURE":
+            maxBattles = 30;
+            break;
+          case "SUPER_LURE":
+            maxBattles = 15;
+            break;
+          default:
+            maxBattles = 10;
+            break;
+        }
+
+        // From [ battlesLeft ] to [ maxBattles, battleCount ]
+        m.args = [ maxBattles, Math.min(m.args[0], maxBattles) ];
+      }
+    });
+
+    data.enemyModifiers.forEach((m) => {
+      if (m.className === "PokemonBaseStatModifier") {
+        m.className = "BaseStatModifier";
+      } else if (m.className === "PokemonResetNegativeStatStageModifier") {
+        m.className = "ResetNegativeStatStageModifier";
+      }
+    });
+  }
+] as const;

src/system/version_migration/versions/v1_1_0.ts

@@ -0,0 +1,32 @@
+import { SessionSaveData } from "../../game-data";
+import { CustomPokemonData } from "#app/data/custom-pokemon-data";
+
+export const systemMigrators = [] as const;
+
+export const settingsMigrators = [] as const;
+
+export const sessionMigrators = [
+  /**
+   *  Converts old Pokemon natureOverride and mysteryEncounterData
+   *  to use the new conjoined {@linkcode Pokemon.customPokemonData} structure instead.
+   *  @param data {@linkcode SessionSaveData}
+   */
+  function migrateCustomPokemonDataAndNatureOverrides(data: SessionSaveData) {
+    // Fix Pokemon nature overrides and custom data migration
+    data.party.forEach(pokemon => {
+      if (pokemon["mysteryEncounterPokemonData"]) {
+        pokemon.customPokemonData = new CustomPokemonData(pokemon["mysteryEncounterPokemonData"]);
+        pokemon["mysteryEncounterPokemonData"] = null;
+      }
+      if (pokemon["fusionMysteryEncounterPokemonData"]) {
+        pokemon.fusionCustomPokemonData = new CustomPokemonData(pokemon["fusionMysteryEncounterPokemonData"]);
+        pokemon["fusionMysteryEncounterPokemonData"] = null;
+      }
+      pokemon.customPokemonData = pokemon.customPokemonData ?? new CustomPokemonData();
+      if (pokemon["natureOverride"] && pokemon["natureOverride"] >= 0) {
+        pokemon.customPokemonData.nature = pokemon["natureOverride"];
+        pokemon["natureOverride"] = -1;
+      }
+    });
+  }
+] as const;

src/test/abilities/early_bird.test.ts

@@ -0,0 +1,93 @@
+import { Status } from "#app/data/status-effect";
+import { MoveResult } from "#app/field/pokemon";
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import { StatusEffect } from "#enums/status-effect";
+import GameManager from "#test/utils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+
+describe("Abilities - Early Bird", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([ Moves.REST, Moves.BELLY_DRUM, Moves.SPLASH ])
+      .ability(Abilities.EARLY_BIRD)
+      .battleType("single")
+      .disableCrits()
+      .enemySpecies(Species.MAGIKARP)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it("reduces Rest's sleep time to 1 turn", async () => {
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+
+    const player = game.scene.getPlayerPokemon()!;
+
+    game.move.select(Moves.BELLY_DRUM);
+    await game.toNextTurn();
+    game.move.select(Moves.REST);
+    await game.toNextTurn();
+
+    expect(player.status?.effect).toBe(StatusEffect.SLEEP);
+
+    game.move.select(Moves.SPLASH);
+    await game.toNextTurn();
+
+    expect(player.status?.effect).toBe(StatusEffect.SLEEP);
+    expect(player.getLastXMoves(1)[0].result).toBe(MoveResult.FAIL);
+
+    game.move.select(Moves.SPLASH);
+    await game.toNextTurn();
+
+    expect(player.status?.effect).toBeUndefined();
+    expect(player.getLastXMoves(1)[0].result).toBe(MoveResult.SUCCESS);
+  });
+
+  it("reduces 3-turn sleep to 1 turn", async () => {
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+
+    const player = game.scene.getPlayerPokemon()!;
+    player.status = new Status(StatusEffect.SLEEP, 0, 4);
+
+    game.move.select(Moves.SPLASH);
+    await game.toNextTurn();
+
+    expect(player.status?.effect).toBe(StatusEffect.SLEEP);
+    expect(player.getLastXMoves(1)[0].result).toBe(MoveResult.FAIL);
+
+    game.move.select(Moves.SPLASH);
+    await game.toNextTurn();
+
+    expect(player.status?.effect).toBeUndefined();
+    expect(player.getLastXMoves(1)[0].result).toBe(MoveResult.SUCCESS);
+  });
+
+  it("reduces 1-turn sleep to 0 turns", async () => {
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+
+    const player = game.scene.getPlayerPokemon()!;
+    player.status = new Status(StatusEffect.SLEEP, 0, 2);
+
+    game.move.select(Moves.SPLASH);
+    await game.toNextTurn();
+
+    expect(player.status?.effect).toBeUndefined();
+    expect(player.getLastXMoves(1)[0].result).toBe(MoveResult.SUCCESS);
+  });
+});

src/test/abilities/infiltrator.test.ts

@@ -0,0 +1,107 @@
+import { ArenaTagSide } from "#app/data/arena-tag";
+import { allMoves } from "#app/data/move";
+import { ArenaTagType } from "#enums/arena-tag-type";
+import { BattlerTagType } from "#enums/battler-tag-type";
+import { Stat } from "#enums/stat";
+import { StatusEffect } from "#enums/status-effect";
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import GameManager from "#test/utils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+
+describe("Abilities - Infiltrator", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([ Moves.TACKLE, Moves.WATER_GUN, Moves.SPORE, Moves.BABY_DOLL_EYES ])
+      .ability(Abilities.INFILTRATOR)
+      .battleType("single")
+      .disableCrits()
+      .enemySpecies(Species.SNORLAX)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH)
+      .startingLevel(100)
+      .enemyLevel(100);
+  });
+
+  it.each([
+    { effectName: "Light Screen", tagType: ArenaTagType.LIGHT_SCREEN, move: Moves.WATER_GUN },
+    { effectName: "Reflect", tagType: ArenaTagType.REFLECT, move: Moves.TACKLE },
+    { effectName: "Aurora Veil", tagType: ArenaTagType.AURORA_VEIL, move: Moves.TACKLE }
+  ])("should bypass the target's $effectName", async ({ tagType, move }) => {
+    await game.classicMode.startBattle([ Species.MAGIKARP ]);
+
+    const player = game.scene.getPlayerPokemon()!;
+    const enemy = game.scene.getEnemyPokemon()!;
+
+    const preScreenDmg = enemy.getAttackDamage(player, allMoves[move]).damage;
+
+    game.scene.arena.addTag(tagType, 1, Moves.NONE, enemy.id, ArenaTagSide.ENEMY, true);
+
+    const postScreenDmg = enemy.getAttackDamage(player, allMoves[move]).damage;
+
+    expect(postScreenDmg).toBe(preScreenDmg);
+    expect(player.battleData.abilitiesApplied[0]).toBe(Abilities.INFILTRATOR);
+  });
+
+  it("should bypass the target's Safeguard", async () => {
+    await game.classicMode.startBattle([ Species.MAGIKARP ]);
+
+    const player = game.scene.getPlayerPokemon()!;
+    const enemy = game.scene.getEnemyPokemon()!;
+
+    game.scene.arena.addTag(ArenaTagType.SAFEGUARD, 1, Moves.NONE, enemy.id, ArenaTagSide.ENEMY, true);
+
+    game.move.select(Moves.SPORE);
+
+    await game.phaseInterceptor.to("BerryPhase", false);
+    expect(enemy.status?.effect).toBe(StatusEffect.SLEEP);
+    expect(player.battleData.abilitiesApplied[0]).toBe(Abilities.INFILTRATOR);
+  });
+
+  // TODO: fix this interaction to pass this test
+  it.skip("should bypass the target's Mist", async () => {
+    await game.classicMode.startBattle([ Species.MAGIKARP ]);
+
+    const player = game.scene.getPlayerPokemon()!;
+    const enemy = game.scene.getEnemyPokemon()!;
+
+    game.scene.arena.addTag(ArenaTagType.MIST, 1, Moves.NONE, enemy.id, ArenaTagSide.ENEMY, true);
+
+    game.move.select(Moves.BABY_DOLL_EYES);
+
+    await game.phaseInterceptor.to("MoveEndPhase");
+    expect(enemy.getStatStage(Stat.ATK)).toBe(-1);
+    expect(player.battleData.abilitiesApplied[0]).toBe(Abilities.INFILTRATOR);
+  });
+
+  it("should bypass the target's Substitute", async () => {
+    await game.classicMode.startBattle([ Species.MAGIKARP ]);
+
+    const player = game.scene.getPlayerPokemon()!;
+    const enemy = game.scene.getEnemyPokemon()!;
+
+    enemy.addTag(BattlerTagType.SUBSTITUTE, 1, Moves.NONE, enemy.id);
+
+    game.move.select(Moves.BABY_DOLL_EYES);
+
+    await game.phaseInterceptor.to("MoveEndPhase");
+    expect(enemy.getStatStage(Stat.ATK)).toBe(-1);
+    expect(player.battleData.abilitiesApplied[0]).toBe(Abilities.INFILTRATOR);
+  });
+});

src/test/abilities/magic_guard.test.ts

@@ -150,7 +150,7 @@ describe("Abilities - Magic Guard", () => {
 
       const enemyPokemon = game.scene.getEnemyPokemon()!;
 
-      const toxicStartCounter = enemyPokemon.status!.turnCount;
+      const toxicStartCounter = enemyPokemon.status!.toxicTurnCount;
       //should be 0
 
       await game.phaseInterceptor.to(TurnEndPhase);
@@ -162,7 +162,7 @@ describe("Abilities - Magic Guard", () => {
        * - The enemy Pokemon's hypothetical CatchRateMultiplier should be 1.5
        */
       expect(enemyPokemon.hp).toBe(enemyPokemon.getMaxHp());
-      expect(enemyPokemon.status!.turnCount).toBeGreaterThan(toxicStartCounter);
+      expect(enemyPokemon.status!.toxicTurnCount).toBeGreaterThan(toxicStartCounter);
       expect(getStatusEffectCatchRateMultiplier(enemyPokemon.status!.effect)).toBe(1.5);
     }
   );

src/test/abilities/power_construct.test.ts

@@ -32,7 +32,7 @@ describe("Abilities - POWER CONSTRUCT", () => {
   });
 
   test(
-    "check if fainted pokemon switches to base form on arena reset",
+    "check if fainted 50% Power Construct Pokemon switches to base form on arena reset",
     async () => {
       const baseForm = 2,
         completeForm = 4;
@@ -41,7 +41,37 @@ describe("Abilities - POWER CONSTRUCT", () => {
         [Species.ZYGARDE]: completeForm,
       });
 
-      await game.startBattle([ Species.MAGIKARP, Species.ZYGARDE ]);
+      await game.classicMode.startBattle([ Species.MAGIKARP, Species.ZYGARDE ]);
+
+      const zygarde = game.scene.getParty().find((p) => p.species.speciesId === Species.ZYGARDE);
+      expect(zygarde).not.toBe(undefined);
+      expect(zygarde!.formIndex).toBe(completeForm);
+
+      zygarde!.hp = 0;
+      zygarde!.status = new Status(StatusEffect.FAINT);
+      expect(zygarde!.isFainted()).toBe(true);
+
+      game.move.select(Moves.SPLASH);
+      await game.doKillOpponents();
+      await game.phaseInterceptor.to(TurnEndPhase);
+      game.doSelectModifier();
+      await game.phaseInterceptor.to(QuietFormChangePhase);
+
+      expect(zygarde!.formIndex).toBe(baseForm);
+    },
+  );
+
+  test(
+    "check if fainted 10% Power Construct Pokemon switches to base form on arena reset",
+    async () => {
+      const baseForm = 3,
+        completeForm = 5;
+      game.override.startingWave(4);
+      game.override.starterForms({
+        [Species.ZYGARDE]: completeForm,
+      });
+
+      await game.classicMode.startBattle([ Species.MAGIKARP, Species.ZYGARDE ]);
 
       const zygarde = game.scene.getParty().find((p) => p.species.speciesId === Species.ZYGARDE);
       expect(zygarde).not.toBe(undefined);

src/test/abilities/volt_absorb.test.ts

@@ -71,4 +71,23 @@ describe("Abilities - Volt Absorb", () => {
     await game.phaseInterceptor.to("BerryPhase", false);
     expect(enemyPokemon.hp).toBe(enemyPokemon.getMaxHp());
   });
+  it("regardless of accuracy should not trigger on pokemon in semi invulnerable state", async () => {
+    game.override.moveset(Moves.THUNDERBOLT);
+    game.override.enemyMoveset(Moves.DIVE);
+    game.override.enemySpecies(Species.MAGIKARP);
+    game.override.enemyAbility(Abilities.VOLT_ABSORB);
+
+    await game.classicMode.startBattle();
+
+    const enemyPokemon = game.scene.getEnemyPokemon()!;
+
+    game.move.select(Moves.THUNDERBOLT);
+    enemyPokemon.hp = enemyPokemon.hp - 1;
+    await game.setTurnOrder([ BattlerIndex.ENEMY, BattlerIndex.PLAYER ]);
+    await game.phaseInterceptor.to("MoveEffectPhase");
+
+    await game.move.forceMiss();
+    await game.phaseInterceptor.to("BerryPhase", false);
+    expect(enemyPokemon.hp).toBeLessThan(enemyPokemon.getMaxHp());
+  });
 });

src/test/data/status-effect.test.ts

@@ -1,4 +1,5 @@
 import {
+  Status,
   StatusEffect,
   getStatusEffectActivationText,
   getStatusEffectDescriptor,
@@ -6,14 +7,19 @@ import {
   getStatusEffectObtainText,
   getStatusEffectOverlapText,
 } from "#app/data/status-effect";
+import { MoveResult } from "#app/field/pokemon";
+import GameManager from "#app/test/utils/gameManager";
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
 import { mockI18next } from "#test/utils/testUtils";
 import i18next from "i18next";
-import { afterEach, beforeAll, describe, expect, it, vi } from "vitest";
+import { afterEach, beforeAll, beforeEach, describe, expect, it, vi } from "vitest";
 
 const pokemonName = "PKM";
 const sourceText = "SOURCE";
 
-describe("status-effect", () => {
+describe("Status Effect Messages", () => {
   beforeAll(() => {
     i18next.init();
   });
@@ -299,3 +305,59 @@ describe("status-effect", () => {
     vi.resetAllMocks();
   });
 });
+
+describe("Status Effects - Sleep", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([ Moves.SPLASH ])
+      .ability(Abilities.BALL_FETCH)
+      .battleType("single")
+      .disableCrits()
+      .enemySpecies(Species.MAGIKARP)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it("should last the appropriate number of turns", async () => {
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+
+    const player = game.scene.getPlayerPokemon()!;
+    player.status = new Status(StatusEffect.SLEEP, 0, 4);
+
+    game.move.select(Moves.SPLASH);
+    await game.toNextTurn();
+
+    expect(player.status.effect).toBe(StatusEffect.SLEEP);
+
+    game.move.select(Moves.SPLASH);
+    await game.toNextTurn();
+
+    expect(player.status.effect).toBe(StatusEffect.SLEEP);
+
+    game.move.select(Moves.SPLASH);
+    await game.toNextTurn();
+
+    expect(player.status.effect).toBe(StatusEffect.SLEEP);
+    expect(player.getLastXMoves(1)[0].result).toBe(MoveResult.FAIL);
+
+    game.move.select(Moves.SPLASH);
+    await game.toNextTurn();
+
+    expect(player.status?.effect).toBeUndefined();
+    expect(player.getLastXMoves(1)[0].result).toBe(MoveResult.SUCCESS);
+  });
+});

src/test/items/lock_capsule.test.ts

@@ -1,7 +1,8 @@
 import { Abilities } from "#app/enums/abilities";
 import { Moves } from "#app/enums/moves";
-import { ModifierTypeOption, modifierTypes } from "#app/modifier/modifier-type";
+import { ModifierTier } from "#app/modifier/modifier-tier";
 import { SelectModifierPhase } from "#app/phases/select-modifier-phase";
+import { Mode } from "#app/ui/ui";
 import GameManager from "#test/utils/gameManager";
 import Phase from "phaser";
 import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
@@ -32,15 +33,16 @@ describe("Items - Lock Capsule", () => {
   });
 
   it("doesn't set the cost of common tier items to 0", async () => {
-    await game.startBattle();
+    await game.classicMode.startBattle();
-
+    game.scene.overridePhase(new SelectModifierPhase(game.scene, 0, undefined, { guaranteedModifierTiers: [ ModifierTier.COMMON, ModifierTier.COMMON, ModifierTier.COMMON ], fillRemaining: false }));
-    game.move.select(Moves.SURF);
-    await game.phaseInterceptor.to(SelectModifierPhase, false);
-
-    const rewards = game.scene.getCurrentPhase() as SelectModifierPhase;
-    const potion = new ModifierTypeOption(modifierTypes.POTION(), 0, 40); // Common tier item
-    const rerollCost = rewards.getRerollCost([ potion, potion, potion ], true);
 
+    game.onNextPrompt("SelectModifierPhase", Mode.MODIFIER_SELECT, () => {
+      const selectModifierPhase = game.scene.getCurrentPhase() as SelectModifierPhase;
+      const rerollCost = selectModifierPhase.getRerollCost(true);
       expect(rerollCost).toBe(150);
+    });
+
+    game.doSelectModifier();
+    await game.phaseInterceptor.to("SelectModifierPhase");
   }, 20000);
 });

src/test/items/toxic_orb.test.ts

@@ -7,8 +7,6 @@ import GameManager from "#test/utils/gameManager";
 import Phaser from "phaser";
 import { afterEach, beforeAll, beforeEach, describe, expect, it, vi } from "vitest";
 
-const TIMEOUT = 20 * 1000;
-
 describe("Items - Toxic orb", () => {
   let phaserGame: Phaser.Game;
   let game: GameManager;
@@ -27,10 +25,10 @@ describe("Items - Toxic orb", () => {
     game = new GameManager(phaserGame);
     game.override
       .battleType("single")
-      .enemySpecies(Species.RATTATA)
+      .enemySpecies(Species.MAGIKARP)
       .ability(Abilities.BALL_FETCH)
       .enemyAbility(Abilities.BALL_FETCH)
-      .moveset([ Moves.SPLASH ])
+      .moveset(Moves.SPLASH)
       .enemyMoveset(Moves.SPLASH)
       .startingHeldItems([{
         name: "TOXIC_ORB",
@@ -39,22 +37,19 @@ describe("Items - Toxic orb", () => {
     vi.spyOn(i18next, "t");
   });
 
-  it("badly poisons the holder", async () => {
+  it("should badly poison the holder", async () => {
-    await game.classicMode.startBattle([ Species.MIGHTYENA ]);
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
 
-    const player = game.scene.getPlayerField()[0];
+    const player = game.scene.getPlayerPokemon()!;
+    expect(player.getHeldItems()[0].type.id).toBe("TOXIC_ORB");
 
     game.move.select(Moves.SPLASH);
 
     await game.phaseInterceptor.to("TurnEndPhase");
-    // Toxic orb should trigger here
+    await game.phaseInterceptor.to("MessagePhase");
-    await game.phaseInterceptor.run("MessagePhase");
     expect(i18next.t).toHaveBeenCalledWith("statusEffect:toxic.obtainSource", expect.anything());
 
-    await game.toNextTurn();
-
     expect(player.status?.effect).toBe(StatusEffect.TOXIC);
-    // Damage should not have ticked yet.
+    expect(player.status?.toxicTurnCount).toBe(0);
-    expect(player.status?.turnCount).toBe(0);
+  });
-  }, TIMEOUT);
 });

src/test/moves/aurora_veil.test.ts

@@ -111,7 +111,7 @@ const getMockedMoveDamage = (defender: Pokemon, attacker: Pokemon, move: Move) =
   const side = defender.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY;
 
   if (defender.scene.arena.getTagOnSide(ArenaTagType.AURORA_VEIL, side)) {
-    defender.scene.arena.applyTagsForSide(ArenaTagType.AURORA_VEIL, side, move.category, defender.scene.currentBattle.double, multiplierHolder);
+    defender.scene.arena.applyTagsForSide(ArenaTagType.AURORA_VEIL, side, false, attacker, move.category, multiplierHolder);
   }
 
   return move.power * multiplierHolder.value;

src/test/moves/destiny_bond.test.ts

@@ -0,0 +1,255 @@
+import { ArenaTagSide, ArenaTrapTag } from "#app/data/arena-tag";
+import { allMoves } from "#app/data/move";
+import { Abilities } from "#enums/abilities";
+import { ArenaTagType } from "#enums/arena-tag-type";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import GameManager from "#test/utils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it, vi } from "vitest";
+import { BattlerIndex } from "#app/battle";
+import { StatusEffect } from "#enums/status-effect";
+import { PokemonInstantReviveModifier } from "#app/modifier/modifier";
+
+
+describe("Moves - Destiny Bond", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  const defaultParty = [ Species.BULBASAUR, Species.SQUIRTLE ];
+  const enemyFirst = [ BattlerIndex.ENEMY, BattlerIndex.PLAYER ];
+  const playerFirst = [ BattlerIndex.PLAYER, BattlerIndex.ENEMY ];
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override.battleType("single")
+      .ability(Abilities.UNNERVE) // Pre-emptively prevent flakiness from opponent berries
+      .enemySpecies(Species.RATTATA)
+      .enemyAbility(Abilities.RUN_AWAY)
+      .startingLevel(100) // Make sure tested moves KO
+      .enemyLevel(5)
+      .enemyMoveset(Moves.DESTINY_BOND);
+  });
+
+  it("should KO the opponent on the same turn", async () => {
+    const moveToUse = Moves.TACKLE;
+
+    game.override.moveset(moveToUse);
+    await game.classicMode.startBattle(defaultParty);
+
+    const enemyPokemon = game.scene.getEnemyPokemon();
+    const playerPokemon = game.scene.getPlayerPokemon();
+
+    game.move.select(moveToUse);
+    await game.setTurnOrder(enemyFirst);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemyPokemon?.isFainted()).toBe(true);
+    expect(playerPokemon?.isFainted()).toBe(true);
+  });
+
+  it("should KO the opponent on the next turn", async () => {
+    const moveToUse = Moves.TACKLE;
+
+    game.override.moveset([ Moves.SPLASH, moveToUse ]);
+    await game.classicMode.startBattle(defaultParty);
+
+    const enemyPokemon = game.scene.getEnemyPokemon();
+    const playerPokemon = game.scene.getPlayerPokemon();
+
+    // Turn 1: Enemy uses Destiny Bond and doesn't faint
+    game.move.select(Moves.SPLASH);
+    await game.setTurnOrder(playerFirst);
+    await game.toNextTurn();
+
+    expect(enemyPokemon?.isFainted()).toBe(false);
+    expect(playerPokemon?.isFainted()).toBe(false);
+
+    // Turn 2: Player KO's the enemy before the enemy's turn
+    game.move.select(moveToUse);
+    await game.setTurnOrder(playerFirst);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemyPokemon?.isFainted()).toBe(true);
+    expect(playerPokemon?.isFainted()).toBe(true);
+  });
+
+  it("should fail if used twice in a row", async () => {
+    const moveToUse = Moves.TACKLE;
+
+    game.override.moveset([ Moves.SPLASH, moveToUse ]);
+    await game.classicMode.startBattle(defaultParty);
+
+    const enemyPokemon = game.scene.getEnemyPokemon();
+    const playerPokemon = game.scene.getPlayerPokemon();
+
+    // Turn 1: Enemy uses Destiny Bond and doesn't faint
+    game.move.select(Moves.SPLASH);
+    await game.setTurnOrder(enemyFirst);
+    await game.toNextTurn();
+
+    expect(enemyPokemon?.isFainted()).toBe(false);
+    expect(playerPokemon?.isFainted()).toBe(false);
+
+    // Turn 2: Enemy should fail Destiny Bond then get KO'd
+    game.move.select(moveToUse);
+    await game.setTurnOrder(enemyFirst);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemyPokemon?.isFainted()).toBe(true);
+    expect(playerPokemon?.isFainted()).toBe(false);
+  });
+
+  it("should not KO the opponent if the user dies to weather", async () => {
+    // Opponent will be reduced to 1 HP by False Swipe, then faint to Sandstorm
+    const moveToUse = Moves.FALSE_SWIPE;
+
+    game.override.moveset(moveToUse)
+      .ability(Abilities.SAND_STREAM);
+    await game.classicMode.startBattle(defaultParty);
+
+    const enemyPokemon = game.scene.getEnemyPokemon();
+    const playerPokemon = game.scene.getPlayerPokemon();
+
+    game.move.select(moveToUse);
+    await game.setTurnOrder(enemyFirst);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemyPokemon?.isFainted()).toBe(true);
+    expect(playerPokemon?.isFainted()).toBe(false);
+  });
+
+  it("should not KO the opponent if the user had another turn", async () => {
+    const moveToUse = Moves.TACKLE;
+
+    game.override.moveset([ Moves.SPORE, moveToUse ]);
+    await game.classicMode.startBattle(defaultParty);
+
+    const enemyPokemon = game.scene.getEnemyPokemon();
+    const playerPokemon = game.scene.getPlayerPokemon();
+
+    // Turn 1: Enemy uses Destiny Bond and doesn't faint
+    game.move.select(Moves.SPORE);
+    await game.setTurnOrder(enemyFirst);
+    await game.toNextTurn();
+
+    expect(enemyPokemon?.isFainted()).toBe(false);
+    expect(playerPokemon?.isFainted()).toBe(false);
+    expect(enemyPokemon?.status?.effect).toBe(StatusEffect.SLEEP);
+
+    // Turn 2: Enemy should skip a turn due to sleep, then get KO'd
+    game.move.select(moveToUse);
+    await game.setTurnOrder(enemyFirst);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemyPokemon?.isFainted()).toBe(true);
+    expect(playerPokemon?.isFainted()).toBe(false);
+  });
+
+  it("should not KO an ally", async () => {
+    game.override.moveset([ Moves.DESTINY_BOND, Moves.CRUNCH ])
+      .battleType("double");
+    await game.classicMode.startBattle([ Species.SHEDINJA, Species.BULBASAUR, Species.SQUIRTLE ]);
+
+    const enemyPokemon0 = game.scene.getEnemyField()[0];
+    const enemyPokemon1 = game.scene.getEnemyField()[1];
+    const playerPokemon0 = game.scene.getPlayerField()[0];
+    const playerPokemon1 = game.scene.getPlayerField()[1];
+
+    // Shedinja uses Destiny Bond, then ally Bulbasaur KO's Shedinja with Crunch
+    game.move.select(Moves.DESTINY_BOND, 0);
+    game.move.select(Moves.CRUNCH, 1, BattlerIndex.PLAYER);
+    await game.setTurnOrder([ BattlerIndex.PLAYER, BattlerIndex.PLAYER_2, BattlerIndex.ENEMY, BattlerIndex.ENEMY_2 ]);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemyPokemon0?.isFainted()).toBe(false);
+    expect(enemyPokemon1?.isFainted()).toBe(false);
+    expect(playerPokemon0?.isFainted()).toBe(true);
+    expect(playerPokemon1?.isFainted()).toBe(false);
+  });
+
+  it("should not cause a crash if the user is KO'd by Ceaseless Edge", async () => {
+    const moveToUse = Moves.CEASELESS_EDGE;
+    vi.spyOn(allMoves[moveToUse], "accuracy", "get").mockReturnValue(100);
+
+    game.override.moveset(moveToUse);
+    await game.classicMode.startBattle(defaultParty);
+
+    const enemyPokemon = game.scene.getEnemyPokemon();
+    const playerPokemon = game.scene.getPlayerPokemon();
+
+    game.move.select(moveToUse);
+    await game.setTurnOrder(enemyFirst);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemyPokemon?.isFainted()).toBe(true);
+    expect(playerPokemon?.isFainted()).toBe(true);
+
+    // Ceaseless Edge spikes effect should still activate
+    const tagAfter = game.scene.arena.getTagOnSide(ArenaTagType.SPIKES, ArenaTagSide.ENEMY) as ArenaTrapTag;
+    expect(tagAfter.tagType).toBe(ArenaTagType.SPIKES);
+    expect(tagAfter.layers).toBe(1);
+  });
+
+  it("should not cause a crash if the user is KO'd by Pledge moves", async () => {
+    game.override.moveset([ Moves.GRASS_PLEDGE, Moves.WATER_PLEDGE ])
+      .battleType("double");
+    await game.classicMode.startBattle(defaultParty);
+
+    const enemyPokemon0 = game.scene.getEnemyField()[0];
+    const enemyPokemon1 = game.scene.getEnemyField()[1];
+    const playerPokemon0 = game.scene.getPlayerField()[0];
+    const playerPokemon1 = game.scene.getPlayerField()[1];
+
+    game.move.select(Moves.GRASS_PLEDGE, 0, BattlerIndex.ENEMY);
+    game.move.select(Moves.WATER_PLEDGE, 1, BattlerIndex.ENEMY);
+    await game.setTurnOrder([ BattlerIndex.ENEMY, BattlerIndex.ENEMY_2, BattlerIndex.PLAYER, BattlerIndex.PLAYER_2 ]);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemyPokemon0?.isFainted()).toBe(true);
+    expect(enemyPokemon1?.isFainted()).toBe(false);
+    expect(playerPokemon0?.isFainted()).toBe(false);
+    expect(playerPokemon1?.isFainted()).toBe(true);
+
+    // Pledge secondary effect should still activate
+    const tagAfter = game.scene.arena.getTagOnSide(ArenaTagType.GRASS_WATER_PLEDGE, ArenaTagSide.ENEMY) as ArenaTrapTag;
+    expect(tagAfter.tagType).toBe(ArenaTagType.GRASS_WATER_PLEDGE);
+  });
+
+  /**
+   * In particular, this should prevent something like
+   * {@link https://github.com/pagefaultgames/pokerogue/issues/4219}
+   * from occurring with fainting by KO'ing a Destiny Bond user with U-Turn.
+   */
+  it("should not allow the opponent to revive via Reviver Seed", async () => {
+    const moveToUse = Moves.TACKLE;
+
+    game.override.moveset(moveToUse)
+      .startingHeldItems([{ name: "REVIVER_SEED" }]);
+    await game.classicMode.startBattle(defaultParty);
+
+    const enemyPokemon = game.scene.getEnemyPokemon();
+    const playerPokemon = game.scene.getPlayerPokemon();
+
+    game.move.select(moveToUse);
+    await game.setTurnOrder(enemyFirst);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemyPokemon?.isFainted()).toBe(true);
+    expect(playerPokemon?.isFainted()).toBe(true);
+
+    // Check that the Tackle user's Reviver Seed did not activate
+    const revSeeds = game.scene.getModifiers(PokemonInstantReviveModifier).filter(m => m.pokemonId === playerPokemon?.id);
+    expect(revSeeds.length).toBe(1);
+  });
+});

src/test/moves/light_screen.test.ts

@@ -94,7 +94,7 @@ const getMockedMoveDamage = (defender: Pokemon, attacker: Pokemon, move: Move) =
   const side = defender.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY;
 
   if (defender.scene.arena.getTagOnSide(ArenaTagType.LIGHT_SCREEN, side)) {
-    defender.scene.arena.applyTagsForSide(ArenaTagType.LIGHT_SCREEN, side, move.category, defender.scene.currentBattle.double, multiplierHolder);
+    defender.scene.arena.applyTagsForSide(ArenaTagType.LIGHT_SCREEN, side, false, attacker, move.category, multiplierHolder);
   }
 
   return move.power * multiplierHolder.value;

src/test/moves/nightmare.test.ts

@@ -0,0 +1,52 @@
+import { StatusEffect } from "#app/data/status-effect";
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import GameManager from "#test/utils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+
+describe("Moves - Nightmare", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+
+    game.override.battleType("single")
+      .enemySpecies(Species.RATTATA)
+      .enemyMoveset(Moves.SPLASH)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyStatusEffect(StatusEffect.SLEEP)
+      .startingLevel(5)
+      .moveset([ Moves.NIGHTMARE, Moves.SPLASH ]);
+  });
+
+  it("lowers enemy hp by 1/4 each turn while asleep", async () => {
+    await game.classicMode.startBattle([ Species.HYPNO ]);
+
+    const enemyPokemon = game.scene.getEnemyPokemon()!;
+    const enemyMaxHP = enemyPokemon.hp;
+
+    game.move.select(Moves.NIGHTMARE);
+    await game.toNextTurn();
+
+    expect(enemyPokemon.hp).toBe(enemyMaxHP - Math.floor(enemyMaxHP / 4));
+
+    // take a second turn to make sure damage occurs again
+    game.move.select(Moves.SPLASH);
+    await game.toNextTurn();
+
+    expect(enemyPokemon.hp).toBe(enemyMaxHP - Math.floor(enemyMaxHP / 4) - Math.floor(enemyMaxHP / 4));
+  });
+});

src/test/moves/power_trick.test.ts

@@ -0,0 +1,113 @@
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+import Phaser from "phaser";
+import GameManager from "#app/test/utils/gameManager";
+import { Moves } from "#enums/moves";
+import { Stat } from "#enums/stat";
+import { Species } from "#enums/species";
+import { TurnEndPhase } from "#app/phases/turn-end-phase";
+import { Abilities } from "#enums/abilities";
+import { BattlerTagType } from "#enums/battler-tag-type";
+
+describe("Moves - Power Trick", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .battleType("single")
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH)
+      .enemySpecies(Species.MEW)
+      .enemyLevel(200)
+      .moveset([ Moves.POWER_TRICK ])
+      .ability(Abilities.BALL_FETCH);
+  });
+
+  it("swaps the user's ATK and DEF stats", async () => {
+    await game.classicMode.startBattle([ Species.SHUCKLE ]);
+
+    const player = game.scene.getPlayerPokemon()!;
+    const baseATK = player.getStat(Stat.ATK, false);
+    const baseDEF = player.getStat(Stat.DEF, false);
+
+    game.move.select(Moves.POWER_TRICK);
+
+    await game.phaseInterceptor.to(TurnEndPhase);
+
+    expect(player.getStat(Stat.ATK, false)).toBe(baseDEF);
+    expect(player.getStat(Stat.DEF, false)).toBe(baseATK);
+    expect(player.getTag(BattlerTagType.POWER_TRICK)).toBeDefined();
+  });
+
+  it("resets initial ATK and DEF stat swap when used consecutively", async () => {
+    await game.classicMode.startBattle([ Species.SHUCKLE ]);
+
+    const player = game.scene.getPlayerPokemon()!;
+    const baseATK = player.getStat(Stat.ATK, false);
+    const baseDEF = player.getStat(Stat.DEF, false);
+
+    game.move.select(Moves.POWER_TRICK);
+
+    await game.phaseInterceptor.to(TurnEndPhase);
+
+    game.move.select(Moves.POWER_TRICK);
+
+    await game.phaseInterceptor.to(TurnEndPhase);
+
+    expect(player.getStat(Stat.ATK, false)).toBe(baseATK);
+    expect(player.getStat(Stat.DEF, false)).toBe(baseDEF);
+    expect(player.getTag(BattlerTagType.POWER_TRICK)).toBeUndefined();
+  });
+
+  it("should pass effect when using BATON_PASS", async () => {
+    await game.classicMode.startBattle([ Species.SHUCKLE, Species.SHUCKLE ]);
+    await game.override.moveset([ Moves.POWER_TRICK, Moves.BATON_PASS ]);
+
+    const player = game.scene.getPlayerPokemon()!;
+    player.addTag(BattlerTagType.POWER_TRICK);
+
+    game.move.select(Moves.BATON_PASS);
+    game.doSelectPartyPokemon(1);
+
+    await game.phaseInterceptor.to(TurnEndPhase);
+
+    const switchedPlayer = game.scene.getPlayerPokemon()!;
+    const baseATK = switchedPlayer.getStat(Stat.ATK);
+    const baseDEF = switchedPlayer.getStat(Stat.DEF);
+
+    expect(switchedPlayer.getStat(Stat.ATK, false)).toBe(baseDEF);
+    expect(switchedPlayer.getStat(Stat.DEF, false)).toBe(baseATK);
+    expect(switchedPlayer.getTag(BattlerTagType.POWER_TRICK)).toBeDefined();
+  });
+
+  it("should remove effect after using Transform", async () => {
+    await game.classicMode.startBattle([ Species.SHUCKLE, Species.SHUCKLE ]);
+    await game.override.moveset([ Moves.POWER_TRICK, Moves.TRANSFORM ]);
+
+    const player = game.scene.getPlayerPokemon()!;
+    player.addTag(BattlerTagType.POWER_TRICK);
+
+    game.move.select(Moves.TRANSFORM);
+
+    await game.phaseInterceptor.to(TurnEndPhase);
+
+    const enemy = game.scene.getEnemyPokemon()!;
+    const baseATK = enemy.getStat(Stat.ATK);
+    const baseDEF = enemy.getStat(Stat.DEF);
+
+    expect(player.getStat(Stat.ATK, false)).toBe(baseATK);
+    expect(player.getStat(Stat.DEF, false)).toBe(baseDEF);
+    expect(player.getTag(BattlerTagType.POWER_TRICK)).toBeUndefined();
+  });
+});

src/test/moves/reflect.test.ts

@@ -94,7 +94,7 @@ const getMockedMoveDamage = (defender: Pokemon, attacker: Pokemon, move: Move) =
   const side = defender.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY;
 
   if (defender.scene.arena.getTagOnSide(ArenaTagType.REFLECT, side)) {
-    defender.scene.arena.applyTagsForSide(ArenaTagType.REFLECT, side, move.category, defender.scene.currentBattle.double, multiplierHolder);
+    defender.scene.arena.applyTagsForSide(ArenaTagType.REFLECT, side, false, attacker, move.category, multiplierHolder);
   }
 
   return move.power * multiplierHolder.value;

src/test/moves/secret_power.test.ts

@@ -0,0 +1,89 @@
+import { Abilities } from "#enums/abilities";
+import { Biome } from "#enums/biome";
+import { Moves } from "#enums/moves";
+import { Stat } from "#enums/stat";
+import { allMoves, SecretPowerAttr } from "#app/data/move";
+import { Species } from "#enums/species";
+import GameManager from "#test/utils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it, vi } from "vitest";
+import { StatusEffect } from "#enums/status-effect";
+import { BattlerIndex } from "#app/battle";
+import { ArenaTagType } from "#enums/arena-tag-type";
+import { ArenaTagSide } from "#app/data/arena-tag";
+
+describe("Moves - Secret Power", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([ Moves.SECRET_POWER ])
+      .ability(Abilities.BALL_FETCH)
+      .battleType("single")
+      .disableCrits()
+      .enemySpecies(Species.MAGIKARP)
+      .enemyLevel(60)
+      .enemyAbility(Abilities.BALL_FETCH);
+  });
+
+  it("Secret Power checks for an active terrain first then looks at the biome for its secondary effect", async () => {
+    game.override
+      .startingBiome(Biome.VOLCANO)
+      .enemyMoveset([ Moves.SPLASH, Moves.MISTY_TERRAIN ]);
+    vi.spyOn(allMoves[Moves.SECRET_POWER], "chance", "get").mockReturnValue(100);
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+
+    const enemyPokemon  = game.scene.getEnemyPokemon()!;
+
+    // No Terrain + Biome.VOLCANO --> Burn
+    game.move.select(Moves.SECRET_POWER);
+    await game.forceEnemyMove(Moves.SPLASH);
+    await game.phaseInterceptor.to("TurnEndPhase");
+    expect(enemyPokemon.status?.effect).toBe(StatusEffect.BURN);
+
+    // Misty Terrain --> SpAtk -1
+    game.move.select(Moves.SECRET_POWER);
+    await game.forceEnemyMove(Moves.MISTY_TERRAIN);
+    await game.phaseInterceptor.to("TurnEndPhase");
+    expect(enemyPokemon.getStatStage(Stat.SPATK)).toBe(-1);
+  });
+
+  it("the 'rainbow' effect of fire+water pledge does not double the chance of secret power's secondary effect",
+    async () => {
+      game.override
+        .moveset([ Moves.FIRE_PLEDGE, Moves.WATER_PLEDGE, Moves.SECRET_POWER, Moves.SPLASH ])
+        .enemyMoveset([ Moves.SPLASH ])
+        .battleType("double");
+      await game.classicMode.startBattle([ Species.BLASTOISE, Species.CHARIZARD ]);
+
+      const secretPowerAttr = allMoves[Moves.SECRET_POWER].getAttrs(SecretPowerAttr)[0];
+      vi.spyOn(secretPowerAttr, "getMoveChance");
+
+      game.move.select(Moves.WATER_PLEDGE, 0, BattlerIndex.ENEMY);
+      game.move.select(Moves.FIRE_PLEDGE, 1, BattlerIndex.ENEMY_2);
+
+      await game.phaseInterceptor.to("TurnEndPhase");
+
+      expect(game.scene.arena.getTagOnSide(ArenaTagType.WATER_FIRE_PLEDGE, ArenaTagSide.PLAYER)).toBeDefined();
+
+      game.move.select(Moves.SECRET_POWER, 0, BattlerIndex.ENEMY);
+      game.move.select(Moves.SPLASH, 1);
+
+      await game.phaseInterceptor.to("BerryPhase", false);
+
+      expect(secretPowerAttr.getMoveChance).toHaveLastReturnedWith(30);
+    }
+  );
+});

src/test/moves/toxic_spikes.test.ts

@@ -9,8 +9,6 @@ import GameManager from "#test/utils/gameManager";
 import Phaser from "phaser";
 import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
 
-const TIMEOUT = 20 * 1000;
-
 describe("Moves - Toxic Spikes", () => {
   let phaserGame: Phaser.Game;
   let game: GameManager;
@@ -34,10 +32,10 @@ describe("Moves - Toxic Spikes", () => {
       .enemyAbility(Abilities.BALL_FETCH)
       .ability(Abilities.BALL_FETCH)
       .enemyMoveset(Moves.SPLASH)
-      .moveset([ Moves.TOXIC_SPIKES, Moves.SPLASH, Moves.ROAR ]);
+      .moveset([ Moves.TOXIC_SPIKES, Moves.SPLASH, Moves.ROAR, Moves.COURT_CHANGE ]);
   });
 
-  it("should not affect the opponent if they do not switch", async() => {
+  it("should not affect the opponent if they do not switch", async () => {
     await game.classicMode.runToSummon([ Species.MIGHTYENA, Species.POOCHYENA ]);
 
     const enemy = game.scene.getEnemyField()[0];
@@ -51,9 +49,9 @@ describe("Moves - Toxic Spikes", () => {
 
     expect(enemy.hp).toBe(enemy.getMaxHp());
     expect(enemy.status?.effect).toBeUndefined();
-  }, TIMEOUT);
+  });
 
-  it("should poison the opponent if they switch into 1 layer", async() => {
+  it("should poison the opponent if they switch into 1 layer", async () => {
     await game.classicMode.runToSummon([ Species.MIGHTYENA ]);
 
     game.move.select(Moves.TOXIC_SPIKES);
@@ -65,9 +63,9 @@ describe("Moves - Toxic Spikes", () => {
 
     expect(enemy.hp).toBeLessThan(enemy.getMaxHp());
     expect(enemy.status?.effect).toBe(StatusEffect.POISON);
-  }, TIMEOUT);
+  });
 
-  it("should badly poison the opponent if they switch into 2 layers", async() => {
+  it("should badly poison the opponent if they switch into 2 layers", async () => {
     await game.classicMode.runToSummon([ Species.MIGHTYENA ]);
 
     game.move.select(Moves.TOXIC_SPIKES);
@@ -80,27 +78,32 @@ describe("Moves - Toxic Spikes", () => {
     const enemy = game.scene.getEnemyField()[0];
     expect(enemy.hp).toBeLessThan(enemy.getMaxHp());
     expect(enemy.status?.effect).toBe(StatusEffect.TOXIC);
-  }, TIMEOUT);
+  });
 
-  it("should be removed if a grounded poison pokemon switches in", async() => {
+  it("should be removed if a grounded poison pokemon switches in", async () => {
-    game.override.enemySpecies(Species.GRIMER);
+    await game.classicMode.runToSummon([ Species.MUK, Species.PIDGEY ]);
-    await game.classicMode.runToSummon([ Species.MIGHTYENA ]);
+
+    const muk = game.scene.getPlayerPokemon()!;
 
     game.move.select(Moves.TOXIC_SPIKES);
-    await game.phaseInterceptor.to("TurnEndPhase");
+    await game.toNextTurn();
-    game.move.select(Moves.TOXIC_SPIKES);
+    // also make sure the toxic spikes are removed even if the pokemon
-    await game.phaseInterceptor.to("TurnEndPhase");
+    // that set them up is the one switching in (https://github.com/pagefaultgames/pokerogue/issues/935)
-    game.move.select(Moves.ROAR);
+    game.move.select(Moves.COURT_CHANGE);
-    await game.phaseInterceptor.to("TurnEndPhase");
+    await game.toNextTurn();
-
+    game.doSwitchPokemon(1);
-    const enemy = game.scene.getEnemyField()[0];
+    await game.toNextTurn();
-    expect(enemy.hp).toBe(enemy.getMaxHp());
+    game.doSwitchPokemon(1);
-    expect(enemy.status?.effect).toBeUndefined();
+    await game.toNextTurn();
+    game.move.select(Moves.SPLASH);
+    await game.toNextTurn();
 
+    expect(muk.isFullHp()).toBe(true);
+    expect(muk.status?.effect).toBeUndefined();
     expect(game.scene.arena.tags.length).toBe(0);
-  }, TIMEOUT);
+  });
 
-  it("shouldn't create multiple layers per use in doubles", async() => {
+  it("shouldn't create multiple layers per use in doubles", async () => {
     await game.classicMode.runToSummon([ Species.MIGHTYENA, Species.POOCHYENA ]);
 
     game.move.select(Moves.TOXIC_SPIKES);
@@ -109,9 +112,9 @@ describe("Moves - Toxic Spikes", () => {
     const arenaTags = (game.scene.arena.getTagOnSide(ArenaTagType.TOXIC_SPIKES, ArenaTagSide.ENEMY) as ArenaTrapTag);
     expect(arenaTags.tagType).toBe(ArenaTagType.TOXIC_SPIKES);
     expect(arenaTags.layers).toBe(1);
-  }, TIMEOUT);
+  });
 
-  it("should persist through reload", async() => {
+  it("should persist through reload", async () => {
     game.override.startingWave(1);
     const scene = game.scene;
     const gameData = new GameData(scene);
@@ -132,5 +135,5 @@ describe("Moves - Toxic Spikes", () => {
 
     expect(sessionData.arena.tags).toEqual(recoveredData.arena.tags);
     localStorage.removeItem("sessionTestData");
-  }, TIMEOUT);
+  });
 });

src/test/moves/will_o_wisp.test.ts

@@ -0,0 +1,53 @@
+import { BattlerIndex } from "#app/battle";
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import { StatusEffect } from "#enums/status-effect";
+import GameManager from "#test/utils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+
+describe("Moves - Will-O-Wisp", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([ Moves.WILL_O_WISP, Moves.SPLASH ])
+      .ability(Abilities.BALL_FETCH)
+      .battleType("single")
+      .disableCrits()
+      .enemySpecies(Species.MAGIKARP)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it("should burn the opponent", async () => {
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+
+    const enemy = game.scene.getEnemyPokemon()!;
+
+    game.move.select(Moves.WILL_O_WISP);
+    await game.setTurnOrder([ BattlerIndex.PLAYER, BattlerIndex.ENEMY ]);
+    await game.move.forceHit();
+    await game.toNextTurn();
+
+    expect(enemy.status?.effect).toBe(StatusEffect.BURN);
+
+    game.move.select(Moves.SPLASH);
+    await game.toNextTurn();
+
+    expect(enemy.status?.effect).toBe(StatusEffect.BURN);
+  });
+});

src/test/mystery-encounter/encounters/bug-type-superfan-encounter.test.ts

@@ -476,10 +476,11 @@ describe("Bug-Type Superfan - Mystery Encounter", () => {
 
       expect(scene.ui.getMode()).to.equal(Mode.MODIFIER_SELECT);
       const modifierSelectHandler = scene.ui.handlers.find(h => h instanceof ModifierSelectUiHandler) as ModifierSelectUiHandler;
-      expect(modifierSelectHandler.options.length).toEqual(3);
+      expect(modifierSelectHandler.options.length).toEqual(4);
       expect(modifierSelectHandler.options[0].modifierTypeOption.type.id).toBe("MASTER_BALL");
-      expect(modifierSelectHandler.options[1].modifierTypeOption.type.id).toBe("MAX_LURE");
+      expect(modifierSelectHandler.options[1].modifierTypeOption.type.id).toBe("MEGA_BRACELET");
-      expect(modifierSelectHandler.options[2].modifierTypeOption.type.id).toBe("FORM_CHANGE_ITEM");
+      expect(modifierSelectHandler.options[2].modifierTypeOption.type.id).toBe("DYNAMAX_BAND");
+      expect(modifierSelectHandler.options[3].modifierTypeOption.type.id).toBe("FORM_CHANGE_ITEM");
     });
 
     it("should leave encounter without battle", async () => {

src/test/mystery-encounter/encounters/clowning-around-encounter.test.ts

@@ -118,11 +118,11 @@ describe("Clowning Around - Mystery Encounter", () => {
     });
     expect(config.pokemonConfigs?.[1]).toEqual({
       species: getPokemonSpecies(Species.BLACEPHALON),
-      mysteryEncounterPokemonData: expect.anything(),
+      customPokemonData: expect.anything(),
       isBoss: true,
       moveSet: [ Moves.TRICK, Moves.HYPNOSIS, Moves.SHADOW_BALL, Moves.MIND_BLOWN ]
     });
-    expect(config.pokemonConfigs?.[1].mysteryEncounterPokemonData?.types.length).toBe(2);
+    expect(config.pokemonConfigs?.[1].customPokemonData?.types.length).toBe(2);
     expect([
       Abilities.STURDY,
       Abilities.PICKUP,
@@ -139,8 +139,8 @@ describe("Clowning Around - Mystery Encounter", () => {
       Abilities.MAGICIAN,
       Abilities.SHEER_FORCE,
       Abilities.PRANKSTER
-    ]).toContain(config.pokemonConfigs?.[1].mysteryEncounterPokemonData?.ability);
+    ]).toContain(config.pokemonConfigs?.[1].customPokemonData?.ability);
-    expect(ClowningAroundEncounter.misc.ability).toBe(config.pokemonConfigs?.[1].mysteryEncounterPokemonData?.ability);
+    expect(ClowningAroundEncounter.misc.ability).toBe(config.pokemonConfigs?.[1].customPokemonData?.ability);
     await vi.waitFor(() => expect(moveInitSpy).toHaveBeenCalled());
     await vi.waitFor(() => expect(moveLoadSpy).toHaveBeenCalled());
     expect(onInitResult).toBe(true);
@@ -219,7 +219,7 @@ describe("Clowning Around - Mystery Encounter", () => {
       await game.phaseInterceptor.to(NewBattlePhase, false);
 
       const leadPokemon = scene.getParty()[0];
-      expect(leadPokemon.mysteryEncounterPokemonData?.ability).toBe(abilityToTrain);
+      expect(leadPokemon.customPokemonData?.ability).toBe(abilityToTrain);
     });
   });
 
@@ -340,9 +340,9 @@ describe("Clowning Around - Mystery Encounter", () => {
       scene.getParty()[2].moveset = [];
       await runMysteryEncounterToEnd(game, 3);
 
-      const leadTypesAfter = scene.getParty()[0].mysteryEncounterPokemonData?.types;
+      const leadTypesAfter = scene.getParty()[0].customPokemonData?.types;
-      const secondaryTypesAfter = scene.getParty()[1].mysteryEncounterPokemonData?.types;
+      const secondaryTypesAfter = scene.getParty()[1].customPokemonData?.types;
-      const thirdTypesAfter = scene.getParty()[2].mysteryEncounterPokemonData?.types;
+      const thirdTypesAfter = scene.getParty()[2].customPokemonData?.types;
 
       expect(leadTypesAfter.length).toBe(2);
       expect(leadTypesAfter[0]).toBe(Type.WATER);