[Balance][ME] Various ME Balance changes (#4700)

* balance changes and updates to various MEs

* fix import to new item

* fix import to new item

* Update src/data/mystery-encounters/utils/encounter-pokemon-utils.ts

Co-authored-by: NightKev <34855794+DayKev@users.noreply.github.com>

* Update src/phases/select-modifier-phase.ts

Co-authored-by: NightKev <34855794+DayKev@users.noreply.github.com>

* Update src/modifier/modifier.ts

Co-authored-by: NightKev <34855794+DayKev@users.noreply.github.com>

* Update src/modifier/modifier.ts

Co-authored-by: NightKev <34855794+DayKev@users.noreply.github.com>

* revert item atlas changes

* eslint

* revert 'revert item atlas'

* update locale repo to latest commit

* Fix fiery fallout missing argument

* [balance] Training session ME does not update Seen/Defeated GameStats

* [balance] update Weird Dream ME maximum spawn wave

* [ME] update CombinationRequirements to allow AND or OR combinations

* refactor: CombinationPokemonRequirement `.Some()` and `Every()`

* chore: rename `orRequirements` to `requirements`

* fix: returns of `Some()` and `Any()`

* apply `Some()` / `Any()` pattern to `CombinationSceneRequirement` too

* revert 'offer you can't refuse' giving Silver Pokeball'

* Apply code review suggestions

* [me] Weird Dream: apply same old gateau logic to team in options 1 and 2

---------

Co-authored-by: ImperialSympathizer <imperialsympathizer@gmail.com>
Co-authored-by: ImperialSympathizer <110984302+ben-lear@users.noreply.github.com>
Co-authored-by: NightKev <34855794+DayKev@users.noreply.github.com>
Co-authored-by: flx-sta <50131232+flx-sta@users.noreply.github.com>
Co-authored-by: innerthunder <brandonerickson98@gmail.com>

public/images/trainer/future_self_f.json

@@ -0,0 +1,41 @@
+{
+	"textures": [
+		{
+			"image": "future_self_f.png",
+			"format": "RGBA8888",
+			"size": {
+				"w": 29,
+				"h": 69
+			},
+			"scale": 1,
+			"frames": [
+				{
+					"filename": "0001.png",
+					"rotated": false,
+					"trimmed": true,
+					"sourceSize": {
+						"w": 69,
+						"h": 69
+					},
+					"spriteSourceSize": {
+						"x": 21,
+						"y": 0,
+						"w": 29,
+						"h": 69
+					},
+					"frame": {
+						"x": 0,
+						"y": 0,
+						"w": 29,
+						"h": 69
+					}
+				}
+			]
+		}
+	],
+	"meta": {
+		"app": "https://www.codeandweb.com/texturepacker",
+		"version": "3.0",
+		"smartupdate": "$TexturePacker:SmartUpdate:4eb16332c2e77886e4e621b62269f05e:26f1bc53c853efdbe228d67604b95b54:d25525a5db42bd57d2afe4b6e3081ee1$"
+	}
+}

public/images/trainer/future_self_m.json

@@ -0,0 +1,41 @@
+{
+	"textures": [
+		{
+			"image": "future_self_m.png",
+			"format": "RGBA8888",
+			"size": {
+				"w": 36,
+				"h": 73
+			},
+			"scale": 1,
+			"frames": [
+				{
+					"filename": "0001.png",
+					"rotated": false,
+					"trimmed": true,
+					"sourceSize": {
+						"w": 73,
+						"h": 73
+					},
+					"spriteSourceSize": {
+						"x": 18,
+						"y": 0,
+						"w": 36,
+						"h": 73
+					},
+					"frame": {
+						"x": 0,
+						"y": 0,
+						"w": 36,
+						"h": 73
+					}
+				}
+			]
+		}
+	],
+	"meta": {
+		"app": "https://www.codeandweb.com/texturepacker",
+		"version": "3.0",
+		"smartupdate": "$TexturePacker:SmartUpdate:0d8d68d06ae75bc93d72b54183a9df02:d3d509801da9ff5c0bd4793a05ece391:83c4b8c2ed25ea7d9795bec5c40c8602$"
+	}
+}

public/locales

@@ -1 +1 @@
-Subproject commit 3ccef8472dd7cc7c362538489954cb8fdad27e5f
+Subproject commit 87615556d8a2bd7eef7abac818f84423a8a13b03

src/data/balance/pokemon-evolutions.ts

@@ -10,7 +10,7 @@ import { Biome } from "#enums/biome";
 import { Moves } from "#enums/moves";
 import { Species } from "#enums/species";
 import { TimeOfDay } from "#enums/time-of-day";
-import { DamageMoneyRewardModifier, ExtraModifierModifier, MoneyMultiplierModifier } from "#app/modifier/modifier";
+import { DamageMoneyRewardModifier, ExtraModifierModifier, MoneyMultiplierModifier, TempExtraModifierModifier } from "#app/modifier/modifier";
 import { SpeciesFormKey } from "#enums/species-form-key";
 
 
@@ -1652,11 +1652,11 @@ export const pokemonEvolutions: PokemonEvolutions = {
     new SpeciesFormEvolution(Species.GHOLDENGO, "chest", "", 1, null, new SpeciesEvolutionCondition(p => p.evoCounter
       + p.getHeldItems().filter(m => m instanceof DamageMoneyRewardModifier).length
       + p.scene.findModifiers(m => m instanceof MoneyMultiplierModifier
-        || m instanceof ExtraModifierModifier).length > 9), SpeciesWildEvolutionDelay.VERY_LONG),
+        || m instanceof ExtraModifierModifier || m instanceof TempExtraModifierModifier).length > 9), SpeciesWildEvolutionDelay.VERY_LONG),
     new SpeciesFormEvolution(Species.GHOLDENGO, "roaming", "", 1, null, new SpeciesEvolutionCondition(p => p.evoCounter
       + p.getHeldItems().filter(m => m instanceof DamageMoneyRewardModifier).length
       + p.scene.findModifiers(m => m instanceof MoneyMultiplierModifier
-        || m instanceof ExtraModifierModifier).length > 9), SpeciesWildEvolutionDelay.VERY_LONG)
+        || m instanceof ExtraModifierModifier || m instanceof TempExtraModifierModifier).length > 9), SpeciesWildEvolutionDelay.VERY_LONG)
   ]
 };
 

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

@@ -1,4 +1,4 @@
-import { leaveEncounterWithoutBattle, setEncounterExp, updatePlayerMoney, } from "#app/data/mystery-encounters/utils/encounter-phase-utils";
+import { generateModifierType, leaveEncounterWithoutBattle, setEncounterExp, updatePlayerMoney, } from "#app/data/mystery-encounters/utils/encounter-phase-utils";
 import { modifierTypes } from "#app/modifier/modifier-type";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { Species } from "#enums/species";
@@ -14,6 +14,7 @@ import { MysteryEncounterTier } from "#enums/mystery-encounter-tier";
 import { MysteryEncounterOptionMode } from "#enums/mystery-encounter-option-mode";
 import { ModifierRewardPhase } from "#app/phases/modifier-reward-phase";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/game-mode";
+import i18next from "i18next";
 
 /** the i18n namespace for this encounter */
 const namespace = "mysteryEncounters/anOfferYouCantRefuse";
@@ -98,6 +99,8 @@ export const AnOfferYouCantRefuseEncounter: MysteryEncounter =
         }
       }
 
+      const shinyCharm = generateModifierType(scene, modifierTypes.SHINY_CHARM);
+      encounter.setDialogueToken("itemName", shinyCharm?.name ?? i18next.t("modifierType:ModifierType.SHINY_CHARM.name"));
       encounter.setDialogueToken("liepardName", getPokemonSpecies(Species.LIEPARD).getName());
 
       return true;
@@ -123,7 +126,7 @@ export const AnOfferYouCantRefuseEncounter: MysteryEncounter =
           return true;
         })
         .withOptionPhase(async (scene: BattleScene) => {
-          // Give the player a Shiny charm
+          // Give the player a Shiny Charm
           scene.unshiftPhase(new ModifierRewardPhase(scene, modifierTypes.SHINY_CHARM));
           leaveEncounterWithoutBattle(scene, true);
         })
@@ -132,9 +135,11 @@ export const AnOfferYouCantRefuseEncounter: MysteryEncounter =
     .withOption(
       MysteryEncounterOptionBuilder
         .newOptionWithMode(MysteryEncounterOptionMode.DISABLED_OR_SPECIAL)
-        .withPrimaryPokemonRequirement(new CombinationPokemonRequirement(
+        .withPrimaryPokemonRequirement(
+          CombinationPokemonRequirement.Some(
             new MoveRequirement(EXTORTION_MOVES, true),
-          new AbilityRequirement(EXTORTION_ABILITIES, true))
+            new AbilityRequirement(EXTORTION_ABILITIES, true)
+          )
         )
         .withDialogue({
           buttonLabel: `${namespace}:option.2.label`,

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

@@ -193,12 +193,14 @@ const WAVE_LEVEL_BREAKPOINTS = [ 30, 50, 70, 100, 120, 140, 160 ];
 export const BugTypeSuperfanEncounter: MysteryEncounter =
   MysteryEncounterBuilder.withEncounterType(MysteryEncounterType.BUG_TYPE_SUPERFAN)
     .withEncounterTier(MysteryEncounterTier.GREAT)
-    .withPrimaryPokemonRequirement(new CombinationPokemonRequirement(
+    .withPrimaryPokemonRequirement(
+      CombinationPokemonRequirement.Some(
         // Must have at least 1 Bug type on team, OR have a bug item somewhere on the team
         new HeldItemRequirement([ "BypassSpeedChanceModifier", "ContactHeldItemTransferChanceModifier" ], 1),
         new AttackTypeBoosterHeldItemTypeRequirement(Type.BUG, 1),
         new TypeRequirement(Type.BUG, false, 1)
-    ))
+      )
+    )
     .withMaxAllowedEncounters(1)
     .withSceneWaveRangeRequirement(...CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES)
     .withIntroSpriteConfigs([]) // These are set in onInit()
@@ -405,11 +407,13 @@ export const BugTypeSuperfanEncounter: MysteryEncounter =
       .build())
     .withOption(MysteryEncounterOptionBuilder
       .newOptionWithMode(MysteryEncounterOptionMode.DISABLED_OR_DEFAULT)
-      .withPrimaryPokemonRequirement(new CombinationPokemonRequirement(
+      .withPrimaryPokemonRequirement(
+        CombinationPokemonRequirement.Some(
           // Meets one or both of the below reqs
           new HeldItemRequirement([ "BypassSpeedChanceModifier", "ContactHeldItemTransferChanceModifier" ], 1),
           new AttackTypeBoosterHeldItemTypeRequirement(Type.BUG, 1)
-      ))
+        )
+      )
       .withDialogue({
         buttonLabel: `${namespace}:option.3.label`,
         buttonTooltip: `${namespace}:option.3.tooltip`,

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

@@ -11,7 +11,7 @@ import { Species } from "#enums/species";
 import { TrainerType } from "#enums/trainer-type";
 import { getPokemonSpecies } from "#app/data/pokemon-species";
 import { Abilities } from "#enums/abilities";
-import { applyModifierTypeToPlayerPokemon } from "#app/data/mystery-encounters/utils/encounter-pokemon-utils";
+import { applyAbilityOverrideToPokemon, applyModifierTypeToPlayerPokemon } from "#app/data/mystery-encounters/utils/encounter-pokemon-utils";
 import { Type } from "#app/data/type";
 import { MysteryEncounterOptionBuilder } from "#app/data/mystery-encounters/mystery-encounter-option";
 import { MysteryEncounterOptionMode } from "#enums/mystery-encounter-option-mode";
@@ -425,17 +425,8 @@ function onYesAbilitySwap(scene: BattleScene, resolve) {
   const onPokemonSelected = (pokemon: PlayerPokemon) => {
     // Do ability swap
     const encounter = scene.currentBattle.mysteryEncounter!;
-    if (pokemon.isFusion()) {
-      if (!pokemon.fusionCustomPokemonData) {
-        pokemon.fusionCustomPokemonData = new CustomPokemonData();
-      }
-      pokemon.fusionCustomPokemonData.ability = encounter.misc.ability;
-    } else {
-      if (!pokemon.customPokemonData) {
-        pokemon.customPokemonData = new CustomPokemonData();
-      }
-      pokemon.customPokemonData.ability = encounter.misc.ability;
-    }
+
+    applyAbilityOverrideToPokemon(pokemon, encounter.misc.ability);
     encounter.setDialogueToken("chosenPokemon", pokemon.getNameToRender());
     scene.ui.setMode(Mode.MESSAGE).then(() => resolve(true));
   };

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

@@ -14,6 +14,7 @@ import { MysteryEncounterOptionMode } from "#enums/mystery-encounter-option-mode
 import { ModifierRewardPhase } from "#app/phases/modifier-reward-phase";
 import { PokemonFormChangeItemModifier, PokemonHeldItemModifier } from "#app/modifier/modifier";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/game-mode";
+import { Challenges } from "#enums/challenges";
 
 /** i18n namespace for encounter */
 const namespace = "mysteryEncounters/darkDeal";
@@ -141,6 +142,7 @@ export const DarkDealEncounter: MysteryEncounter =
           // Removes random pokemon (including fainted) from party and adds name to dialogue data tokens
           // Will never return last battle able mon and instead pick fainted/unable to battle
           const removedPokemon = getRandomPlayerPokemon(scene, true, false, true);
+
           // Get all the pokemon's held items
           const modifiers = removedPokemon.getHeldItems().filter(m => !(m instanceof PokemonFormChangeItemModifier));
           scene.removePokemonFromPlayerParty(removedPokemon);
@@ -160,7 +162,13 @@ export const DarkDealEncounter: MysteryEncounter =
           scene.unshiftPhase(new ModifierRewardPhase(scene, modifierTypes.ROGUE_BALL));
 
           // Start encounter with random legendary (7-10 starter strength) that has level additive
-          const bossTypes: Type[] = encounter.misc.removedTypes;
+          // If this is a mono-type challenge, always ensure the required type is filtered for
+          let bossTypes: Type[] = encounter.misc.removedTypes;
+          const singleTypeChallenges = scene.gameMode.challenges.filter(c => c.value && c.id === Challenges.SINGLE_TYPE);
+          if (scene.gameMode.isChallenge && singleTypeChallenges.length > 0) {
+            bossTypes = singleTypeChallenges.map(c => (c.value - 1) as Type);
+          }
+
           const bossModifiers: PokemonHeldItemModifier[] = encounter.misc.modifiers;
           // Starter egg tier, 35/50/10/5 %odds for tiers 6/7/8/9+
           const roll = randSeedInt(100);

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

@@ -45,10 +45,13 @@ export const DelibirdyEncounter: MysteryEncounter =
     .withEncounterTier(MysteryEncounterTier.GREAT)
     .withSceneWaveRangeRequirement(...CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES)
     .withSceneRequirement(new MoneyRequirement(0, DELIBIRDY_MONEY_PRICE_MULTIPLIER)) // Must have enough money for it to spawn at the very least
-    .withPrimaryPokemonRequirement(new CombinationPokemonRequirement( // Must also have either option 2 or 3 available to spawn
+    .withPrimaryPokemonRequirement(
+      CombinationPokemonRequirement.Some(
+        // Must also have either option 2 or 3 available to spawn
         new HeldItemRequirement(OPTION_2_ALLOWED_MODIFIERS),
         new HeldItemRequirement(OPTION_3_DISALLOWED_MODIFIERS, 1, true)
-    ))
+      )
+    )
     .withIntroSpriteConfigs([
       {
         spriteKey: "",
@@ -196,7 +199,7 @@ export const DelibirdyEncounter: MysteryEncounter =
           const encounter = scene.currentBattle.mysteryEncounter!;
           const modifier: BerryModifier | HealingBoosterModifier = encounter.misc.chosenModifier;
 
-          // Give the player a Candy Jar if they gave a Berry, and a Healing Charm for Reviver Seed
+          // Give the player a Candy Jar if they gave a Berry, and a Berry Pouch for Reviver Seed
           if (modifier instanceof BerryModifier) {
             // Check if the player has max stacks of that Candy Jar already
             const existing = scene.findModifier(m => m instanceof LevelIncrementBoosterModifier) as LevelIncrementBoosterModifier;
@@ -211,8 +214,8 @@ export const DelibirdyEncounter: MysteryEncounter =
               scene.unshiftPhase(new ModifierRewardPhase(scene, modifierTypes.CANDY_JAR));
             }
           } else {
-            // Check if the player has max stacks of that Healing Charm already
-            const existing = scene.findModifier(m => m instanceof HealingBoosterModifier) as HealingBoosterModifier;
+            // Check if the player has max stacks of that Berry Pouch already
+            const existing = scene.findModifier(m => m instanceof PreserveBerryModifier) as PreserveBerryModifier;
 
             if (existing && existing.getStackCount() >= existing.getMaxStackCount(scene)) {
               // At max stacks, give the first party pokemon a Shell Bell instead
@@ -221,7 +224,7 @@ export const DelibirdyEncounter: MysteryEncounter =
               scene.playSound("item_fanfare");
               await showEncounterText(scene, i18next.t("battle:rewardGain", { modifierName: shellBell.name }), null, undefined, true);
             } else {
-              scene.unshiftPhase(new ModifierRewardPhase(scene, modifierTypes.HEALING_CHARM));
+              scene.unshiftPhase(new ModifierRewardPhase(scene, modifierTypes.BERRY_POUCH));
             }
           }
 
@@ -290,8 +293,8 @@ export const DelibirdyEncounter: MysteryEncounter =
           const encounter = scene.currentBattle.mysteryEncounter!;
           const modifier = encounter.misc.chosenModifier;
 
-          // Check if the player has max stacks of Berry Pouch already
-          const existing = scene.findModifier(m => m instanceof PreserveBerryModifier) as PreserveBerryModifier;
+          // Check if the player has max stacks of Healing Charm already
+          const existing = scene.findModifier(m => m instanceof HealingBoosterModifier) as HealingBoosterModifier;
 
           if (existing && existing.getStackCount() >= existing.getMaxStackCount(scene)) {
             // At max stacks, give the first party pokemon a Shell Bell instead
@@ -300,7 +303,7 @@ export const DelibirdyEncounter: MysteryEncounter =
             scene.playSound("item_fanfare");
             await showEncounterText(scene, i18next.t("battle:rewardGain", { modifierName: shellBell.name }), null, undefined, true);
           } else {
-            scene.unshiftPhase(new ModifierRewardPhase(scene, modifierTypes.BERRY_POUCH));
+            scene.unshiftPhase(new ModifierRewardPhase(scene, modifierTypes.HEALING_CHARM));
           }
 
           // Remove the modifier if its stacks go to 0

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

@@ -4,24 +4,30 @@ import { AttackTypeBoosterModifierType, modifierTypes, } from "#app/modifier/mod
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import BattleScene from "#app/battle-scene";
 import MysteryEncounter, { MysteryEncounterBuilder } from "#app/data/mystery-encounters/mystery-encounter";
-import { TypeRequirement } from "#app/data/mystery-encounters/mystery-encounter-requirements";
+import { AbilityRequirement, CombinationPokemonRequirement, TypeRequirement } from "#app/data/mystery-encounters/mystery-encounter-requirements";
 import { Species } from "#enums/species";
 import { getPokemonSpecies } from "#app/data/pokemon-species";
 import { Gender } from "#app/data/gender";
 import { Type } from "#app/data/type";
 import { BattlerIndex } from "#app/battle";
-import { PokemonMove } from "#app/field/pokemon";
+import Pokemon, { PokemonMove } from "#app/field/pokemon";
 import { Moves } from "#enums/moves";
 import { EncounterBattleAnim } from "#app/data/battle-anims";
 import { WeatherType } from "#app/data/weather";
 import { isNullOrUndefined, randSeedInt } from "#app/utils";
 import { StatusEffect } from "#app/data/status-effect";
 import { queueEncounterMessage } from "#app/data/mystery-encounters/utils/encounter-dialogue-utils";
-import { applyDamageToPokemon, applyModifierTypeToPlayerPokemon } from "#app/data/mystery-encounters/utils/encounter-pokemon-utils";
+import { applyAbilityOverrideToPokemon, applyDamageToPokemon, applyModifierTypeToPlayerPokemon } from "#app/data/mystery-encounters/utils/encounter-pokemon-utils";
 import { MysteryEncounterTier } from "#enums/mystery-encounter-tier";
 import { MysteryEncounterOptionMode } from "#enums/mystery-encounter-option-mode";
 import { EncounterAnim } from "#enums/encounter-anims";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/game-mode";
+import { Abilities } from "#enums/abilities";
+import { BattlerTagType } from "#enums/battler-tag-type";
+import { StatStageChangePhase } from "#app/phases/stat-stage-change-phase";
+import { Stat } from "#enums/stat";
+import { Ability } from "#app/data/ability";
+import { FIRE_RESISTANT_ABILITIES } from "#app/data/mystery-encounters/requirements/requirement-groups";
 
 /** the i18n namespace for the encounter */
 const namespace = "mysteryEncounters/fieryFallout";
@@ -62,16 +68,24 @@ export const FieryFalloutEncounter: MysteryEncounter =
           {
             species: volcaronaSpecies,
             isBoss: false,
-            gender: Gender.MALE
+            gender: Gender.MALE,
+            tags: [ BattlerTagType.MYSTERY_ENCOUNTER_POST_SUMMON ],
+            mysteryEncounterBattleEffects: (pokemon: Pokemon) => {
+              pokemon.scene.unshiftPhase(new StatStageChangePhase(pokemon.scene, pokemon.getBattlerIndex(), true, [ Stat.SPDEF, Stat.SPD ], 1));
+            }
           },
           {
             species: volcaronaSpecies,
             isBoss: false,
-            gender: Gender.FEMALE
+            gender: Gender.FEMALE,
+            tags: [ BattlerTagType.MYSTERY_ENCOUNTER_POST_SUMMON ],
+            mysteryEncounterBattleEffects: (pokemon: Pokemon) => {
+              pokemon.scene.unshiftPhase(new StatStageChangePhase(pokemon.scene, pokemon.getBattlerIndex(), true, [ Stat.SPDEF, Stat.SPD ], 1));
+            }
           }
         ],
         doubleBattle: true,
-        disableSwitch: true
+        disableSwitch: true,
       };
       encounter.enemyPartyConfigs = [ config ];
 
@@ -139,7 +153,7 @@ export const FieryFalloutEncounter: MysteryEncounter =
       async (scene: BattleScene) => {
         // Pick battle
         const encounter = scene.currentBattle.mysteryEncounter!;
-        setEncounterRewards(scene, { fillRemaining: true }, undefined, () => giveLeadPokemonCharcoal(scene));
+        setEncounterRewards(scene, { fillRemaining: true }, undefined, () => giveLeadPokemonAttackTypeBoostItem(scene));
 
         encounter.startOfBattleEffects.push(
           {
@@ -153,18 +167,6 @@ export const FieryFalloutEncounter: MysteryEncounter =
             targets: [ BattlerIndex.PLAYER_2 ],
             move: new PokemonMove(Moves.FIRE_SPIN),
             ignorePp: true
-          },
-          {
-            sourceBattlerIndex: BattlerIndex.ENEMY,
-            targets: [ BattlerIndex.ENEMY ],
-            move: new PokemonMove(Moves.QUIVER_DANCE),
-            ignorePp: true
-          },
-          {
-            sourceBattlerIndex: BattlerIndex.ENEMY_2,
-            targets: [ BattlerIndex.ENEMY_2 ],
-            move: new PokemonMove(Moves.QUIVER_DANCE),
-            ignorePp: true
           });
         await initBattleWithEnemyConfig(scene, scene.currentBattle.mysteryEncounter!.enemyPartyConfigs[0]);
       }
@@ -180,7 +182,7 @@ export const FieryFalloutEncounter: MysteryEncounter =
         ],
       },
       async (scene: BattleScene) => {
-        // Damage non-fire types and burn 1 random non-fire type member
+        // Damage non-fire types and burn 1 random non-fire type member + give it Heatproof
         const encounter = scene.currentBattle.mysteryEncounter!;
         const nonFireTypes = scene.getParty().filter((p) => p.isAllowedInBattle() && !p.getTypes().includes(Type.FIRE));
 
@@ -198,7 +200,11 @@ export const FieryFalloutEncounter: MysteryEncounter =
           if (chosenPokemon.trySetStatus(StatusEffect.BURN)) {
             // Burn applied
             encounter.setDialogueToken("burnedPokemon", chosenPokemon.getNameToRender());
+            encounter.setDialogueToken("abilityName", new Ability(Abilities.HEATPROOF, 3).name);
             queueEncounterMessage(scene, `${namespace}:option.2.target_burned`);
+
+            // Also permanently change the burned Pokemon's ability to Heatproof
+            applyAbilityOverrideToPokemon(chosenPokemon, Abilities.HEATPROOF);
           }
         }
 
@@ -209,8 +215,12 @@ export const FieryFalloutEncounter: MysteryEncounter =
     .withOption(
       MysteryEncounterOptionBuilder
         .newOptionWithMode(MysteryEncounterOptionMode.DISABLED_OR_SPECIAL)
-        .withPrimaryPokemonRequirement(new TypeRequirement(Type.FIRE, true, 1)) // Will set option3PrimaryName dialogue token automatically
-        .withSecondaryPokemonRequirement(new TypeRequirement(Type.FIRE, true, 1)) // Will set option3SecondaryName dialogue token automatically
+        .withPrimaryPokemonRequirement(
+          CombinationPokemonRequirement.Some(
+            new TypeRequirement(Type.FIRE, true, 1),
+            new AbilityRequirement(FIRE_RESISTANT_ABILITIES, true)
+          )
+        ) // Will set option3PrimaryName dialogue token automatically
         .withDialogue({
           buttonLabel: `${namespace}:option.3.label`,
           buttonTooltip: `${namespace}:option.3.tooltip`,
@@ -233,26 +243,32 @@ export const FieryFalloutEncounter: MysteryEncounter =
             { fillRemaining: true },
             undefined,
             () => {
-              giveLeadPokemonCharcoal(scene);
+              giveLeadPokemonAttackTypeBoostItem(scene);
             });
 
           const primary = encounter.options[2].primaryPokemon!;
-          const secondary = encounter.options[2].secondaryPokemon![0];
 
-          setEncounterExp(scene, [ primary.id, secondary.id ], getPokemonSpecies(Species.VOLCARONA).baseExp * 2);
+          setEncounterExp(scene, [ primary.id ], getPokemonSpecies(Species.VOLCARONA).baseExp * 2);
           leaveEncounterWithoutBattle(scene);
         })
         .build()
     )
     .build();
 
-function giveLeadPokemonCharcoal(scene: BattleScene) {
-  // Give first party pokemon Charcoal for free at end of battle
+function giveLeadPokemonAttackTypeBoostItem(scene: BattleScene) {
+  // Give first party pokemon attack type boost item for free at end of battle
   const leadPokemon = scene.getParty()?.[0];
   if (leadPokemon) {
-    const charcoal = generateModifierType(scene, modifierTypes.ATTACK_TYPE_BOOSTER, [ Type.FIRE ]) as AttackTypeBoosterModifierType;
-    applyModifierTypeToPlayerPokemon(scene, leadPokemon, charcoal);
-    scene.currentBattle.mysteryEncounter!.setDialogueToken("leadPokemon", leadPokemon.getNameToRender());
-    queueEncounterMessage(scene, `${namespace}:found_charcoal`);
+    // Generate type booster held item, default to Charcoal if item fails to generate
+    let boosterModifierType = generateModifierType(scene, modifierTypes.ATTACK_TYPE_BOOSTER) as AttackTypeBoosterModifierType;
+    if (!boosterModifierType) {
+      boosterModifierType = generateModifierType(scene, modifierTypes.ATTACK_TYPE_BOOSTER, [ Type.FIRE ]) as AttackTypeBoosterModifierType;
+    }
+    applyModifierTypeToPlayerPokemon(scene, leadPokemon, boosterModifierType);
+
+    const encounter = scene.currentBattle.mysteryEncounter!;
+    encounter.setDialogueToken("itemName", boosterModifierType.name);
+    encounter.setDialogueToken("leadPokemon", leadPokemon.getNameToRender());
+    queueEncounterMessage(scene, `${namespace}:found_item`);
   }
 }

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

@@ -56,7 +56,13 @@ export const MysteriousChallengersEncounter: MysteryEncounter =
 
       // Hard difficulty trainer is another random trainer, but with AVERAGE_BALANCED config
       // Number of mons is based off wave: 1-20 is 2, 20-40 is 3, etc. capping at 6 after wave 100
-      const hardTrainerType = scene.arena.randomTrainerType(scene.currentBattle.waveIndex);
+      let retries = 0;
+      let hardTrainerType = scene.arena.randomTrainerType(scene.currentBattle.waveIndex);
+      while (retries < 5 && hardTrainerType === normalTrainerType) {
+        // Will try to use a different trainer from the normal trainer type
+        hardTrainerType = scene.arena.randomTrainerType(scene.currentBattle.waveIndex);
+        retries++;
+      }
       const hardTemplate = new TrainerPartyCompoundTemplate(
         new TrainerPartyTemplate(1, PartyMemberStrength.STRONGER, false, true),
         new TrainerPartyTemplate(

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

@@ -21,7 +21,7 @@ import i18next from "i18next";
 const namespace = "mysteryEncounters/shadyVitaminDealer";
 
 const VITAMIN_DEALER_CHEAP_PRICE_MULTIPLIER = 1.5;
-const VITAMIN_DEALER_EXPENSIVE_PRICE_MULTIPLIER = 3.5;
+const VITAMIN_DEALER_EXPENSIVE_PRICE_MULTIPLIER = 5;
 
 /**
  * Shady Vitamin Dealer encounter.

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

@@ -222,7 +222,10 @@ export const TheExpertPokemonBreederEncounter: MysteryEncounter =
           encounter.misc.chosenPokemon = pokemon1;
           encounter.setDialogueToken("chosenPokemon", pokemon1.getNameToRender());
           const eggOptions = getEggOptions(scene, pokemon1CommonEggs, pokemon1RareEggs);
-          setEncounterRewards(scene, { fillRemaining: true }, eggOptions, () => doPostEncounterCleanup(scene));
+          setEncounterRewards(scene,
+            { guaranteedModifierTypeFuncs: [ modifierTypes.SOOTHE_BELL ], fillRemaining: true },
+            eggOptions,
+            () => doPostEncounterCleanup(scene));
 
           // Remove all Pokemon from the party except the chosen Pokemon
           removePokemonFromPartyAndStoreHeldItems(scene, encounter, pokemon1);
@@ -271,7 +274,10 @@ export const TheExpertPokemonBreederEncounter: MysteryEncounter =
           encounter.misc.chosenPokemon = pokemon2;
           encounter.setDialogueToken("chosenPokemon", pokemon2.getNameToRender());
           const eggOptions = getEggOptions(scene, pokemon2CommonEggs, pokemon2RareEggs);
-          setEncounterRewards(scene, { fillRemaining: true }, eggOptions, () => doPostEncounterCleanup(scene));
+          setEncounterRewards(scene,
+            { guaranteedModifierTypeFuncs: [ modifierTypes.SOOTHE_BELL ], fillRemaining: true },
+            eggOptions,
+            () => doPostEncounterCleanup(scene));
 
           // Remove all Pokemon from the party except the chosen Pokemon
           removePokemonFromPartyAndStoreHeldItems(scene, encounter, pokemon2);
@@ -320,7 +326,10 @@ export const TheExpertPokemonBreederEncounter: MysteryEncounter =
           encounter.misc.chosenPokemon = pokemon3;
           encounter.setDialogueToken("chosenPokemon", pokemon3.getNameToRender());
           const eggOptions = getEggOptions(scene, pokemon3CommonEggs, pokemon3RareEggs);
-          setEncounterRewards(scene, { fillRemaining: true }, eggOptions, () => doPostEncounterCleanup(scene));
+          setEncounterRewards(scene,
+            { guaranteedModifierTypeFuncs: [ modifierTypes.SOOTHE_BELL ], fillRemaining: true },
+            eggOptions,
+            () => doPostEncounterCleanup(scene));
 
           // Remove all Pokemon from the party except the chosen Pokemon
           removePokemonFromPartyAndStoreHeldItems(scene, encounter, pokemon3);
@@ -454,12 +463,16 @@ function calculateEggRewardsForPokemon(pokemon: PlayerPokemon): [number, number]
   }
 
   // Maximum of 30 points
-  const totalPoints = Math.min(pointsFromStarterTier + pointsFromBst, 30);
+  let totalPoints = Math.min(pointsFromStarterTier + pointsFromBst, 30);
 
-  // 1 Rare egg for every 6 points
-  const numRares = Math.floor(totalPoints / 6);
+  // First 5 points go to Common eggs
+  let numCommons = Math.min(totalPoints, 5);
+  totalPoints -= numCommons;
+
+  // Then, 1 Rare egg for every 4 points
+  const numRares = Math.floor(totalPoints / 4);
   // 1 Common egg for every point leftover
-  const numCommons = totalPoints % 6;
+  numCommons += totalPoints % 4;
 
   return [ numCommons, numRares ];
 }

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

@@ -37,6 +37,7 @@ export const TrainingSessionEncounter: MysteryEncounter =
     .withScenePartySizeRequirement(2, 6, true) // Must have at least 2 unfainted pokemon in party
     .withFleeAllowed(false)
     .withHideWildIntroMessage(true)
+    .withPreventGameStatsUpdates(true) // Do not count the Pokemon as seen or defeated since it is ours
     .withIntroSpriteConfigs([
       {
         spriteKey: "training_session_gear",

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

@@ -71,7 +71,7 @@ export const TrashToTreasureEncounter: MysteryEncounter =
         moveSet: [ Moves.PAYBACK, Moves.GUNK_SHOT, Moves.STOMPING_TANTRUM, Moves.DRAIN_PUNCH ]
       };
       const config: EnemyPartyConfig = {
-        levelAdditiveModifier: 1,
+        levelAdditiveModifier: 0.5,
         pokemonConfigs: [ pokemonConfig ],
         disableSwitch: true
       };

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

@@ -4,23 +4,30 @@ import { Species } from "#enums/species";
 import BattleScene from "#app/battle-scene";
 import MysteryEncounter, { MysteryEncounterBuilder } from "#app/data/mystery-encounters/mystery-encounter";
 import { MysteryEncounterOptionBuilder } from "#app/data/mystery-encounters/mystery-encounter-option";
-import { leaveEncounterWithoutBattle, setEncounterRewards, } from "../utils/encounter-phase-utils";
+import { EnemyPartyConfig, EnemyPokemonConfig, generateModifierType, initBattleWithEnemyConfig, leaveEncounterWithoutBattle, setEncounterRewards, } from "../utils/encounter-phase-utils";
 import { MysteryEncounterTier } from "#enums/mystery-encounter-tier";
 import { MysteryEncounterOptionMode } from "#enums/mystery-encounter-option-mode";
-import { PlayerPokemon, PokemonMove } from "#app/field/pokemon";
+import Pokemon, { PlayerPokemon, PokemonMove } from "#app/field/pokemon";
 import { IntegerHolder, isNullOrUndefined, randSeedInt, randSeedShuffle } from "#app/utils";
 import PokemonSpecies, { allSpecies, getPokemonSpecies } from "#app/data/pokemon-species";
 import { HiddenAbilityRateBoosterModifier, PokemonFormChangeItemModifier, PokemonHeldItemModifier } from "#app/modifier/modifier";
 import { achvs } from "#app/system/achv";
 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 { modifierTypes, PokemonHeldItemModifierType } from "#app/modifier/modifier-type";
 import i18next from "#app/plugins/i18n";
 import { doPokemonTransformationSequence, TransformationScreenPosition } from "#app/data/mystery-encounters/utils/encounter-transformation-sequence";
 import { getLevelTotalExp } from "#app/data/exp";
 import { Stat } from "#enums/stat";
-import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/game-mode";
 import { Challenges } from "#enums/challenges";
+import { ModifierTier } from "#app/modifier/modifier-tier";
+import { PlayerGender } from "#enums/player-gender";
+import { TrainerType } from "#enums/trainer-type";
+import PokemonData from "#app/system/pokemon-data";
+import { Nature } from "#enums/nature";
+import HeldModifierConfig from "#app/interfaces/held-modifier-config";
+import { trainerConfigs, TrainerPartyTemplate } from "#app/data/trainer-config";
+import { PartyMemberStrength } from "#enums/party-member-strength";
 
 /** i18n namespace for encounter */
 const namespace = "mysteryEncounters/weirdDream";
@@ -80,10 +87,11 @@ const EXCLUDED_TRANSFORMATION_SPECIES = [
 
 const SUPER_LEGENDARY_BST_THRESHOLD = 600;
 const NON_LEGENDARY_BST_THRESHOLD = 570;
-const GAIN_OLD_GATEAU_ITEM_BST_THRESHOLD = 450;
+
+const OLD_GATEAU_STATS_UP = 20;
 
 /** 0-100 */
-const PERCENT_LEVEL_LOSS_ON_REFUSE = 12.5;
+const PERCENT_LEVEL_LOSS_ON_REFUSE = 10;
 
 /**
  * Value ranges of the resulting species BST transformations after adding values to original species
@@ -105,7 +113,8 @@ export const WeirdDreamEncounter: MysteryEncounter =
   MysteryEncounterBuilder.withEncounterType(MysteryEncounterType.WEIRD_DREAM)
     .withEncounterTier(MysteryEncounterTier.ROGUE)
     .withDisallowedChallenges(Challenges.SINGLE_TYPE, Challenges.SINGLE_GENERATION)
-    .withSceneWaveRangeRequirement(...CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES)
+    // TODO: should reset minimum wave to 10 when there are more Rogue tiers in pool. Matching Dark Deal minimum for now.
+    .withSceneWaveRangeRequirement(30, 140)
     .withIntroSpriteConfigs([
       {
         spriteKey: "weird_dream_woman",
@@ -131,6 +140,15 @@ export const WeirdDreamEncounter: MysteryEncounter =
     .withQuery(`${namespace}:query`)
     .withOnInit((scene: BattleScene) => {
       scene.loadBgm("mystery_encounter_weird_dream", "mystery_encounter_weird_dream.mp3");
+
+      // Calculate all the newly transformed Pokemon and begin asset load
+      const teamTransformations = getTeamTransformations(scene);
+      const loadAssets = teamTransformations.map(t => (t.newPokemon as PlayerPokemon).loadAssets());
+      scene.currentBattle.mysteryEncounter!.misc = {
+        teamTransformations,
+        loadAssets
+      };
+
       return true;
     })
     .withOnVisualsStart((scene: BattleScene) => {
@@ -156,13 +174,10 @@ export const WeirdDreamEncounter: MysteryEncounter =
             doShowDreamBackground(scene);
           });
 
-          // Calculate all the newly transformed Pokemon and begin asset load
-          const teamTransformations = getTeamTransformations(scene);
-          const loadAssets = teamTransformations.map(t => (t.newPokemon as PlayerPokemon).loadAssets());
-          scene.currentBattle.mysteryEncounter!.misc = {
-            teamTransformations,
-            loadAssets
-          };
+          for (const transformation of scene.currentBattle.mysteryEncounter!.misc.teamTransformations) {
+            scene.removePokemonFromPlayerParty(transformation.previousPokemon, false);
+            scene.getParty().push(transformation.newPokemon);
+          }
         })
         .withOptionPhase(async (scene: BattleScene) => {
           // Starts cutscene dialogue, but does not await so that cutscene plays as player goes through dialogue
@@ -193,7 +208,7 @@ export const WeirdDreamEncounter: MysteryEncounter =
           await showEncounterText(scene, `${namespace}:option.1.dream_complete`);
 
           await doNewTeamPostProcess(scene, transformations);
-          setEncounterRewards(scene, { guaranteedModifierTypeFuncs: [ modifierTypes.MEMORY_MUSHROOM, modifierTypes.ROGUE_BALL, modifierTypes.MINT, modifierTypes.MINT ]});
+          setEncounterRewards(scene, { guaranteedModifierTypeFuncs: [ modifierTypes.MEMORY_MUSHROOM, modifierTypes.ROGUE_BALL, modifierTypes.MINT, modifierTypes.MINT, modifierTypes.MINT ], fillRemaining: false });
           leaveEncounterWithoutBattle(scene, true);
         })
         .build()
@@ -209,7 +224,88 @@ export const WeirdDreamEncounter: MysteryEncounter =
         ],
       },
       async (scene: BattleScene) => {
-        // Reduce party levels by 20%
+        // Battle your "future" team for some item rewards
+        const transformations: PokemonTransformation[] = scene.currentBattle.mysteryEncounter!.misc.teamTransformations;
+
+        // Uses the pokemon that player's party would have transformed into
+        const enemyPokemonConfigs: EnemyPokemonConfig[] = [];
+        for (const transformation of transformations) {
+          const newPokemon = transformation.newPokemon;
+          const previousPokemon = transformation.previousPokemon;
+
+          await postProcessTransformedPokemon(scene, previousPokemon, newPokemon, newPokemon.species.getRootSpeciesId(), true);
+
+          const dataSource = new PokemonData(newPokemon);
+          dataSource.player = false;
+
+          // Copy held items to new pokemon
+          const newPokemonHeldItemConfigs: HeldModifierConfig[] = [];
+          for (const item of transformation.heldItems) {
+            newPokemonHeldItemConfigs.push({
+              modifier: item.clone() as PokemonHeldItemModifier,
+              stackCount: item.getStackCount(),
+              isTransferable: false
+            });
+          }
+          // Any pokemon that is below 570 BST gets +20 permanent BST to 3 stats
+          if (shouldGetOldGateau(newPokemon)) {
+            const stats = getOldGateauBoostedStats(newPokemon);
+            newPokemonHeldItemConfigs.push({
+              modifier: generateModifierType(scene, modifierTypes.MYSTERY_ENCOUNTER_OLD_GATEAU, [ OLD_GATEAU_STATS_UP, stats ]) as PokemonHeldItemModifierType,
+              stackCount: 1,
+              isTransferable: false
+            });
+          }
+
+          const enemyConfig: EnemyPokemonConfig = {
+            species: transformation.newSpecies,
+            isBoss: newPokemon.getSpeciesForm().getBaseStatTotal() > NON_LEGENDARY_BST_THRESHOLD,
+            level: previousPokemon.level,
+            dataSource: dataSource,
+            modifierConfigs: newPokemonHeldItemConfigs
+          };
+
+          enemyPokemonConfigs.push(enemyConfig);
+        }
+
+        const genderIndex = scene.gameData.gender ?? PlayerGender.UNSET;
+        const trainerConfig = trainerConfigs[genderIndex === PlayerGender.FEMALE ? TrainerType.FUTURE_SELF_F : TrainerType.FUTURE_SELF_M].clone();
+        trainerConfig.setPartyTemplates(new TrainerPartyTemplate(transformations.length, PartyMemberStrength.STRONG));
+        const enemyPartyConfig: EnemyPartyConfig = {
+          trainerConfig: trainerConfig,
+          pokemonConfigs: enemyPokemonConfigs,
+          female: genderIndex === PlayerGender.FEMALE
+        };
+
+        const onBeforeRewards = () => {
+          // Before battle rewards, unlock the passive on a pokemon in the player's team for the rest of the run (not permanently)
+          // One random pokemon will get its passive unlocked
+          const passiveDisabledPokemon = scene.getParty().filter(p => !p.passive);
+          if (passiveDisabledPokemon?.length > 0) {
+            const enablePassiveMon = passiveDisabledPokemon[randSeedInt(passiveDisabledPokemon.length)];
+            enablePassiveMon.passive = true;
+            enablePassiveMon.updateInfo(true);
+          }
+        };
+
+        setEncounterRewards(scene, { guaranteedModifierTiers: [ ModifierTier.ROGUE, ModifierTier.ROGUE, ModifierTier.ULTRA, ModifierTier.ULTRA, ModifierTier.GREAT, ModifierTier.GREAT ], fillRemaining: false }, undefined, onBeforeRewards);
+
+        await showEncounterText(scene, `${namespace}:option.2.selected_2`, null, undefined, true);
+        await initBattleWithEnemyConfig(scene, enemyPartyConfig);
+      }
+    )
+    .withSimpleOption(
+      {
+        buttonLabel: `${namespace}:option.3.label`,
+        buttonTooltip: `${namespace}:option.3.tooltip`,
+        selected: [
+          {
+            text: `${namespace}:option.3.selected`,
+          },
+        ],
+      },
+      async (scene: BattleScene) => {
+        // Leave, reduce party levels by 10%
         for (const pokemon of scene.getParty()) {
           pokemon.level = Math.max(Math.ceil((100 - PERCENT_LEVEL_LOSS_ON_REFUSE) / 100 * pokemon.level), 1);
           pokemon.exp = getLevelTotalExp(pokemon.level, pokemon.species.growthRate);
@@ -235,7 +331,7 @@ interface PokemonTransformation {
 function getTeamTransformations(scene: BattleScene): PokemonTransformation[] {
   const party = scene.getParty();
   // Removes all pokemon from the party
-  const alreadyUsedSpecies: PokemonSpecies[] = [];
+  const alreadyUsedSpecies: PokemonSpecies[] = party.map(p => p.species);
   const pokemonTransformations: PokemonTransformation[] = party.map(p => {
     return {
       previousPokemon: p
@@ -250,11 +346,11 @@ function getTeamTransformations(scene: BattleScene): PokemonTransformation[] {
   // First, roll 2 of the party members to new Pokemon at a +90 to +110 BST difference
   // Then, roll the remainder of the party members at a +40 to +50 BST difference
   const numPokemon = party.length;
+  const removedPokemon = randSeedShuffle(party.slice(0));
   for (let i = 0; i < numPokemon; i++) {
-    const removed = party[randSeedInt(party.length)];
+    const removed = removedPokemon[i];
     const index = pokemonTransformations.findIndex(p => p.previousPokemon.id === removed.id);
     pokemonTransformations[index].heldItems = removed.getHeldItems().filter(m => !(m instanceof PokemonFormChangeItemModifier));
-    scene.removePokemonFromPlayerParty(removed, false);
 
     const bst = removed.calculateBaseStats().reduce((a, b) => a + b, 0);
     let newBstRange: [number, number];
@@ -276,14 +372,13 @@ function getTeamTransformations(scene: BattleScene): PokemonTransformation[] {
 
 
     pokemonTransformations[index].newSpecies = newSpecies;
+    console.log("New species: " + JSON.stringify(newSpecies));
     alreadyUsedSpecies.push(newSpecies);
   }
 
   for (const transformation of pokemonTransformations) {
     const newAbilityIndex = randSeedInt(transformation.newSpecies.getAbilityCount());
-    const newPlayerPokemon = scene.addPlayerPokemon(transformation.newSpecies, transformation.previousPokemon.level, newAbilityIndex, undefined);
-    transformation.newPokemon = newPlayerPokemon;
-    scene.getParty().push(newPlayerPokemon);
+    transformation.newPokemon = scene.addPlayerPokemon(transformation.newSpecies, transformation.previousPokemon.level, newAbilityIndex, undefined);
   }
 
   return pokemonTransformations;
@@ -296,6 +391,56 @@ async function doNewTeamPostProcess(scene: BattleScene, transformations: Pokemon
     const newPokemon = transformation.newPokemon;
     const speciesRootForm = newPokemon.species.getRootSpeciesId();
 
+    if (await postProcessTransformedPokemon(scene, previousPokemon, newPokemon, speciesRootForm)) {
+      atLeastOneNewStarter = true;
+    }
+
+    // Copy old items to new pokemon
+    for (const item of transformation.heldItems) {
+      item.pokemonId = newPokemon.id;
+      await scene.addModifier(item, false, false, false, true);
+    }
+    // Any pokemon that is below 570 BST gets +20 permanent BST to 3 stats
+    if (shouldGetOldGateau(newPokemon)) {
+      const stats = getOldGateauBoostedStats(newPokemon);
+      const modType = modifierTypes.MYSTERY_ENCOUNTER_OLD_GATEAU()
+        .generateType(scene.getParty(), [ OLD_GATEAU_STATS_UP, stats ])
+        ?.withIdFromFunc(modifierTypes.MYSTERY_ENCOUNTER_OLD_GATEAU);
+      const modifier = modType?.newModifier(newPokemon);
+      if (modifier) {
+        await scene.addModifier(modifier, false, false, false, true);
+      }
+    }
+
+    newPokemon.calculateStats();
+    await newPokemon.updateInfo();
+  }
+
+  // One random pokemon will get its passive unlocked
+  const passiveDisabledPokemon = scene.getParty().filter(p => !p.passive);
+  if (passiveDisabledPokemon?.length > 0) {
+    const enablePassiveMon = passiveDisabledPokemon[randSeedInt(passiveDisabledPokemon.length)];
+    enablePassiveMon.passive = true;
+    await enablePassiveMon.updateInfo(true);
+  }
+
+  // If at least one new starter was unlocked, play 1 fanfare
+  if (atLeastOneNewStarter) {
+    scene.playSound("level_up_fanfare");
+  }
+}
+
+/**
+ * Applies special changes to the newly transformed pokemon, such as passing previous moves, gaining egg moves, etc.
+ * Returns whether the transformed pokemon unlocks a new starter for the player.
+ * @param scene
+ * @param previousPokemon
+ * @param newPokemon
+ * @param speciesRootForm
+ * @param forBattle Default `false`. If false, will perform achievements and dex unlocks for the player.
+ */
+async function postProcessTransformedPokemon(scene: BattleScene, previousPokemon: PlayerPokemon, newPokemon: PlayerPokemon, speciesRootForm: Species, forBattle: boolean = false): Promise<boolean> {
+  let isNewStarter = false;
   // Roll HA a second time
   if (newPokemon.species.abilityHidden) {
     const hiddenIndex = newPokemon.species.ability2 ? 2 : 1;
@@ -317,8 +462,11 @@ async function doNewTeamPostProcess(scene: BattleScene, transformations: Pokemon
     return newValue > iv ? newValue : iv;
   });
 
+  // Roll a neutral nature
+  newPokemon.nature = [ Nature.HARDY, Nature.DOCILE, Nature.BASHFUL, Nature.QUIRKY, Nature.SERIOUS ][randSeedInt(5)];
+
   // For pokemon at/below 570 BST or any shiny pokemon, unlock it permanently as if you had caught it
-    if (newPokemon.getSpeciesForm().getBaseStatTotal() <= NON_LEGENDARY_BST_THRESHOLD || newPokemon.isShiny()) {
+  if (!forBattle && (newPokemon.getSpeciesForm().getBaseStatTotal() <= NON_LEGENDARY_BST_THRESHOLD || newPokemon.isShiny())) {
     if (newPokemon.getSpeciesForm().abilityHidden && newPokemon.abilityIndex === newPokemon.getSpeciesForm().getAbilityCount() - 1) {
       scene.validateAchv(achvs.HIDDEN_ABILITY);
     }
@@ -338,7 +486,7 @@ async function doNewTeamPostProcess(scene: BattleScene, transformations: Pokemon
     scene.gameData.updateSpeciesDexIvs(newPokemon.species.getRootSpeciesId(true), newPokemon.ivs);
     const newStarterUnlocked = await scene.gameData.setPokemonCaught(newPokemon, true, false, false);
     if (newStarterUnlocked) {
-        atLeastOneNewStarter = true;
+      isNewStarter = true;
       await showEncounterText(scene, i18next.t("battle:addedAsAStarter", { pokemonName: getPokemonSpecies(speciesRootForm).getName() }));
     }
   }
@@ -355,7 +503,7 @@ async function doNewTeamPostProcess(scene: BattleScene, transformations: Pokemon
   });
 
   // For pokemon that the player owns (including ones just caught), gain a candy
-    if (!!scene.gameData.dexData[speciesRootForm].caughtAttr) {
+  if (!forBattle && !!scene.gameData.dexData[speciesRootForm].caughtAttr) {
     scene.gameData.addStarterCandy(getPokemonSpecies(speciesRootForm), 1);
   }
 
@@ -364,9 +512,9 @@ async function doNewTeamPostProcess(scene: BattleScene, transformations: Pokemon
   // Store a copy of a "standard" generated moveset for the new pokemon, will be used later for finding a favored move
   const newPokemonGeneratedMoveset = newPokemon.moveset;
 
-    newPokemon.moveset = previousPokemon.moveset;
+  newPokemon.moveset = previousPokemon.moveset.slice(0);
 
-    const newEggMoveIndex = await addEggMoveToNewPokemonMoveset(scene, newPokemon, speciesRootForm);
+  const newEggMoveIndex = await addEggMoveToNewPokemonMoveset(scene, newPokemon, speciesRootForm, forBattle);
 
   // Try to add a favored STAB move (might fail if Pokemon already knows a bunch of moves from newPokemonGeneratedMoveset)
   addFavoredMoveToNewPokemonMoveset(newPokemon, newPokemonGeneratedMoveset, newEggMoveIndex);
@@ -384,48 +532,35 @@ async function doNewTeamPostProcess(scene: BattleScene, transformations: Pokemon
   }
   newPokemon.customPokemonData.types = newTypes;
 
-    for (const item of transformation.heldItems) {
-      item.pokemonId = newPokemon.id;
-      await scene.addModifier(item, false, false, false, true);
+  // Enable passive if previous had it
+  newPokemon.passive = previousPokemon.passive;
+
+  return isNewStarter;
 }
 
-    // Any pokemon that is at or below 450 BST gets +20 permanent BST to 3 stats:  HP (halved, +10), lowest of Atk/SpAtk, and lowest of Def/SpDef
-    if (newPokemon.getSpeciesForm().getBaseStatTotal() <= GAIN_OLD_GATEAU_ITEM_BST_THRESHOLD) {
-      const stats: Stat[] = [ Stat.HP ];
-      const baseStats = newPokemon.getSpeciesForm().baseStats.slice(0);
+/**
+ * @returns `true` if a given Pokemon has valid BST to be given an Old Gateau
+ */
+function shouldGetOldGateau(pokemon: Pokemon): boolean {
+  return pokemon.getSpeciesForm().getBaseStatTotal() < NON_LEGENDARY_BST_THRESHOLD;
+}
+
+/**
+ * Get the lowest of HP/Spd, lowest of Atk/SpAtk, and lowest of Def/SpDef
+ * @returns Array of 3 {@linkcode Stat}s to boost
+ */
+function getOldGateauBoostedStats(pokemon: Pokemon): Stat[] {
+  const stats: Stat[] = [];
+  const baseStats = pokemon.getSpeciesForm().baseStats.slice(0);
+  // HP or Speed
+  stats.push(baseStats[Stat.HP] < baseStats[Stat.SPD] ? Stat.HP : Stat.SPD);
   // Attack or SpAtk
   stats.push(baseStats[Stat.ATK] < baseStats[Stat.SPATK] ? Stat.ATK : Stat.SPATK);
   // Def or SpDef
   stats.push(baseStats[Stat.DEF] < baseStats[Stat.SPDEF] ? Stat.DEF : Stat.SPDEF);
-      const modType = modifierTypes.MYSTERY_ENCOUNTER_OLD_GATEAU()
-        .generateType(scene.getParty(), [ 20, stats ])
-        ?.withIdFromFunc(modifierTypes.MYSTERY_ENCOUNTER_OLD_GATEAU);
-      const modifier = modType?.newModifier(newPokemon);
-      if (modifier) {
-        await scene.addModifier(modifier, false, false, false, true);
-      }
+  return stats;
 }
 
-    // Enable passive if previous had it
-    newPokemon.passive = previousPokemon.passive;
-
-    newPokemon.calculateStats();
-    await newPokemon.updateInfo();
-  }
-
-  // One random pokemon will get its passive unlocked
-  const passiveDisabledPokemon = scene.getParty().filter(p => !p.passive);
-  if (passiveDisabledPokemon?.length > 0) {
-    const enablePassiveMon = passiveDisabledPokemon[randSeedInt(passiveDisabledPokemon.length)];
-    enablePassiveMon.passive = true;
-    await enablePassiveMon.updateInfo(true);
-  }
-
-  // If at least one new starter was unlocked, play 1 fanfare
-  if (atLeastOneNewStarter) {
-    scene.playSound("level_up_fanfare");
-  }
-}
 
 function getTransformedSpecies(originalBst: number, bstSearchRange: [number, number], hasPokemonBstHigherThan600: boolean, hasPokemonBstBetween570And600: boolean, alreadyUsedSpecies: PokemonSpecies[]): PokemonSpecies {
   let newSpecies: PokemonSpecies | undefined;
@@ -550,7 +685,7 @@ function doSideBySideTransformations(scene: BattleScene, transformations: Pokemo
  * @param newPokemon
  * @param speciesRootForm
  */
-async function addEggMoveToNewPokemonMoveset(scene: BattleScene, newPokemon: PlayerPokemon, speciesRootForm: Species): Promise<number | null> {
+async function addEggMoveToNewPokemonMoveset(scene: BattleScene, newPokemon: PlayerPokemon, speciesRootForm: Species, forBattle: boolean = false): Promise<number | null> {
   let eggMoveIndex: null | number = null;
   const eggMoves = newPokemon.getEggMoves()?.slice(0);
   if (eggMoves) {
@@ -576,7 +711,7 @@ async function addEggMoveToNewPokemonMoveset(scene: BattleScene, newPokemon: Pla
       }
 
       // For pokemon that the player owns (including ones just caught), unlock the egg move
-      if (!isNullOrUndefined(randomEggMoveIndex) && !!scene.gameData.dexData[speciesRootForm].caughtAttr) {
+      if (!forBattle && !isNullOrUndefined(randomEggMoveIndex) && !!scene.gameData.dexData[speciesRootForm].caughtAttr) {
         await scene.gameData.setEggMoveUnlocked(getPokemonSpecies(speciesRootForm), randomEggMoveIndex, true);
       }
     }

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

@@ -37,31 +37,58 @@ export abstract class EncounterSceneRequirement implements EncounterRequirement
   abstract getDialogueToken(scene: BattleScene, pokemon?: PlayerPokemon): [string, string];
 }
 
+/**
+ * Combination of multiple {@linkcode EncounterSceneRequirement | EncounterSceneRequirements} (OR/AND possible. See {@linkcode isAnd})
+ */
 export class CombinationSceneRequirement extends EncounterSceneRequirement {
-  orRequirements: EncounterSceneRequirement[];
+  /** If `true`, all requirements must be met (AND). If `false`, any requirement must be met (OR) */
+  private isAnd: boolean;
+  requirements: EncounterSceneRequirement[];
 
-  constructor(... orRequirements: EncounterSceneRequirement[]) {
+  public static Some(...requirements: EncounterSceneRequirement[]): CombinationSceneRequirement {
+    return new CombinationSceneRequirement(false, ...requirements);
+  }
+
+  public static Every(...requirements: EncounterSceneRequirement[]): CombinationSceneRequirement {
+    return new CombinationSceneRequirement(true, ...requirements);
+  }
+
+  private constructor(isAnd: boolean, ...requirements: EncounterSceneRequirement[]) {
     super();
-    this.orRequirements = orRequirements;
+    this.isAnd = isAnd;
+    this.requirements = requirements;
   }
 
+  /**
+   * Checks if all/any requirements are met (depends on {@linkcode isAnd})
+   * @param scene The {@linkcode BattleScene} to check against
+   * @returns true if all/any requirements are met (depends on {@linkcode isAnd})
+   */
   override meetsRequirement(scene: BattleScene): boolean {
-    for (const req of this.orRequirements) {
-      if (req.meetsRequirement(scene)) {
-        return true;
-      }
-    }
-    return false;
+    return this.isAnd
+      ? this.requirements.every(req => req.meetsRequirement(scene))
+      : this.requirements.some(req => req.meetsRequirement(scene));
   }
 
+  /**
+   * Retrieves a dialogue token key/value pair for the given {@linkcode EncounterSceneRequirement | requirements}.
+   * @param scene The {@linkcode BattleScene} to check against
+   * @param pokemon The {@linkcode PlayerPokemon} to check against
+   * @returns A dialogue token key/value pair
+   * @throws An {@linkcode Error} if {@linkcode isAnd} is `true` (not supported)
+   */
   override getDialogueToken(scene: BattleScene, pokemon?: PlayerPokemon): [string, string] {
-    for (const req of this.orRequirements) {
+    if (this.isAnd) {
+      throw new Error("Not implemented (Sorry)");
+    } else {
+      for (const req of this.requirements) {
         if (req.meetsRequirement(scene)) {
           return req.getDialogueToken(scene, pokemon);
         }
       }
 
-    return this.orRequirements[0].getDialogueToken(scene, pokemon);
+      return this.requirements[0].getDialogueToken(scene, pokemon);
+    }
   }
 }
 
@@ -90,44 +117,74 @@ export abstract class EncounterPokemonRequirement implements EncounterRequiremen
   abstract getDialogueToken(scene: BattleScene, pokemon?: PlayerPokemon): [string, string];
 }
 
+/**
+ * Combination of multiple {@linkcode EncounterPokemonRequirement | EncounterPokemonRequirements} (OR/AND possible. See {@linkcode isAnd})
+ */
 export class CombinationPokemonRequirement extends EncounterPokemonRequirement {
-  orRequirements: EncounterPokemonRequirement[];
+  /** If `true`, all requirements must be met (AND). If `false`, any requirement must be met (OR) */
+  private isAnd: boolean;
+  private requirements: EncounterPokemonRequirement[];
 
-  constructor(...orRequirements: EncounterPokemonRequirement[]) {
+  public static Some(...requirements: EncounterPokemonRequirement[]): CombinationPokemonRequirement {
+    return new CombinationPokemonRequirement(false, ...requirements);
+  }
+
+  public static Every(...requirements: EncounterPokemonRequirement[]): CombinationPokemonRequirement {
+    return new CombinationPokemonRequirement(true, ...requirements);
+  }
+
+  private constructor(isAnd: boolean, ...requirements: EncounterPokemonRequirement[]) {
     super();
+    this.isAnd = isAnd;
     this.invertQuery = false;
     this.minNumberOfPokemon = 1;
-    this.orRequirements = orRequirements;
+    this.requirements = requirements;
   }
 
+  /**
+   * Checks if all/any requirements are met (depends on {@linkcode isAnd})
+   * @param scene The {@linkcode BattleScene} to check against
+   * @returns true if all/any requirements are met (depends on {@linkcode isAnd})
+   */
   override meetsRequirement(scene: BattleScene): boolean {
-    for (const req of this.orRequirements) {
-      if (req.meetsRequirement(scene)) {
-        return true;
-      }
-    }
-    return false;
+    return this.isAnd
+      ? this.requirements.every(req => req.meetsRequirement(scene))
+      : this.requirements.some(req => req.meetsRequirement(scene));
   }
 
+  /**
+   * Queries the players party for all party members that are compatible with all/any requirements (depends on {@linkcode isAnd})
+   * @param partyPokemon The party of {@linkcode PlayerPokemon}
+   * @returns All party members that are compatible with all/any requirements (depends on {@linkcode isAnd})
+   */
   override queryParty(partyPokemon: PlayerPokemon[]): PlayerPokemon[] {
-    for (const req of this.orRequirements) {
-      const result = req.queryParty(partyPokemon);
-      if (result?.length > 0) {
-        return result;
+    if (this.isAnd) {
+      return this.requirements.reduce((relevantPokemon, req) => req.queryParty(relevantPokemon), partyPokemon);
+    } else {
+      const matchingRequirement = this.requirements.find(req => req.queryParty(partyPokemon).length > 0);
+      return matchingRequirement ? matchingRequirement.queryParty(partyPokemon) : [];
     }
   }
 
-    return [];
-  }
-
+  /**
+   * Retrieves a dialogue token key/value pair for the given {@linkcode EncounterPokemonRequirement | requirements}.
+   * @param scene The {@linkcode BattleScene} to check against
+   * @param pokemon The {@linkcode PlayerPokemon} to check against
+   * @returns A dialogue token key/value pair
+   * @throws An {@linkcode Error} if {@linkcode isAnd} is `true` (not supported)
+   */
   override getDialogueToken(scene: BattleScene, pokemon?: PlayerPokemon): [string, string] {
-    for (const req of this.orRequirements) {
+    if (this.isAnd) {
+      throw new Error("Not implemented (Sorry)");
+    } else {
+      for (const req of this.requirements) {
         if (req.meetsRequirement(scene)) {
           return req.getDialogueToken(scene, pokemon);
         }
       }
 
-    return this.orRequirements[0].getDialogueToken(scene, pokemon);
+      return this.requirements[0].getDialogueToken(scene, pokemon);
+    }
   }
 }
 

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

@@ -53,6 +53,7 @@ export interface IMysteryEncounter {
   hasBattleAnimationsWithoutTargets: boolean;
   skipEnemyBattleTurns: boolean;
   skipToFightInput: boolean;
+  preventGameStatsUpdates: boolean;
 
   onInit?: (scene: BattleScene) => boolean;
   onVisualsStart?: (scene: BattleScene) => boolean;
@@ -150,6 +151,10 @@ export default class MysteryEncounter implements IMysteryEncounter {
    * If true, will skip COMMAND input and go straight to FIGHT (move select) input menu
    */
   skipToFightInput: boolean;
+  /**
+   * If true, will prevent updating {@linkcode GameStats} for encountering and/or defeating Pokemon
+   */
+  preventGameStatsUpdates: boolean;
 
   // #region Event callback functions
 
@@ -548,6 +553,7 @@ export class MysteryEncounterBuilder implements Partial<IMysteryEncounter> {
   hasBattleAnimationsWithoutTargets: boolean = false;
   skipEnemyBattleTurns: boolean = false;
   skipToFightInput: boolean = false;
+  preventGameStatsUpdates: boolean = false;
   maxAllowedEncounters: number = 3;
   expMultiplier: number = 1;
 
@@ -735,6 +741,14 @@ export class MysteryEncounterBuilder implements Partial<IMysteryEncounter> {
     return Object.assign(this, { skipToFightInput });
   }
 
+  /**
+   * If true, will prevent updating {@linkcode GameStats} for encountering and/or defeating Pokemon
+   * Default `false`
+   */
+  withPreventGameStatsUpdates(preventGameStatsUpdates: boolean): this & Required<Pick<IMysteryEncounter, "preventGameStatsUpdates">> {
+    return Object.assign(this, { preventGameStatsUpdates });
+  }
+
   /**
    * Sets the maximum number of times that an encounter can spawn in a given Classic run
    * @param maxAllowedEncounters

src/data/mystery-encounters/requirements/requirement-groups.ts

@@ -118,3 +118,20 @@ export const EXTORTION_ABILITIES = [
   Abilities.SUCTION_CUPS,
   Abilities.STICKY_HOLD
 ];
+
+/**
+ * Abilities that signify resistance to fire
+ */
+export const FIRE_RESISTANT_ABILITIES = [
+  Abilities.FLAME_BODY,
+  Abilities.FLASH_FIRE,
+  Abilities.WELL_BAKED_BODY,
+  Abilities.HEATPROOF,
+  Abilities.THERMAL_EXCHANGE,
+  Abilities.THICK_FAT,
+  Abilities.WATER_BUBBLE,
+  Abilities.MAGMA_ARMOR,
+  Abilities.WATER_VEIL,
+  Abilities.STEAM_ENGINE,
+  Abilities.PRIMORDIAL_SEA
+];

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

@@ -21,6 +21,8 @@ import { Gender } from "#app/data/gender";
 import { PermanentStat } from "#enums/stat";
 import { VictoryPhase } from "#app/phases/victory-phase";
 import { SummaryUiMode } from "#app/ui/summary-ui-handler";
+import { CustomPokemonData } from "#app/data/custom-pokemon-data";
+import { Abilities } from "#enums/abilities";
 
 /** Will give +1 level every 10 waves */
 export const STANDARD_ENCOUNTER_BOOSTED_LEVEL_MODIFIER = 1;
@@ -833,3 +835,21 @@ export function isPokemonValidForEncounterOptionSelection(pokemon: Pokemon, scen
 
   return null;
 }
+
+/**
+ * Permanently overrides the ability (not passive) of a pokemon.
+ * If the pokemon is a fusion, instead overrides the fused pokemon's ability.
+ */
+export function applyAbilityOverrideToPokemon(pokemon: Pokemon, ability: Abilities) {
+  if (pokemon.isFusion()) {
+    if (!pokemon.fusionCustomPokemonData) {
+      pokemon.fusionCustomPokemonData = new CustomPokemonData();
+    }
+    pokemon.fusionCustomPokemonData.ability = ability;
+  } else {
+    if (!pokemon.customPokemonData) {
+      pokemon.customPokemonData = new CustomPokemonData();
+    }
+    pokemon.customPokemonData.ability = ability;
+  }
+}

src/data/trainer-config.ts

@@ -2500,6 +2500,22 @@ export const trainerConfigs: TrainerConfigs = {
   [TrainerType.BUG_TYPE_SUPERFAN]: new TrainerConfig(++t).setMoneyMultiplier(2.25).setEncounterBgm(TrainerType.ACE_TRAINER)
     .setPartyTemplates(new TrainerPartyTemplate(2, PartyMemberStrength.AVERAGE)),
   [TrainerType.EXPERT_POKEMON_BREEDER]: new TrainerConfig(++t).setMoneyMultiplier(3).setEncounterBgm(TrainerType.ACE_TRAINER).setLocalizedName("Expert Pokemon Breeder")
-    .setPartyTemplates(new TrainerPartyTemplate(3, PartyMemberStrength.STRONG))
+    .setPartyTemplates(new TrainerPartyTemplate(3, PartyMemberStrength.AVERAGE)),
+  [TrainerType.FUTURE_SELF_M]: new TrainerConfig(++t)
+    .setMoneyMultiplier(0)
+    .setEncounterBgm("mystery_encounter_weird_dream")
+    .setBattleBgm("mystery_encounter_weird_dream")
+    .setMixedBattleBgm("mystery_encounter_weird_dream")
+    .setVictoryBgm("mystery_encounter_weird_dream")
+    .setLocalizedName("Future Self M")
+    .setPartyTemplates(new TrainerPartyTemplate(6, PartyMemberStrength.STRONG)),
+  [TrainerType.FUTURE_SELF_F]: new TrainerConfig(++t)
+    .setMoneyMultiplier(0)
+    .setEncounterBgm("mystery_encounter_weird_dream")
+    .setBattleBgm("mystery_encounter_weird_dream")
+    .setMixedBattleBgm("mystery_encounter_weird_dream")
+    .setVictoryBgm("mystery_encounter_weird_dream")
+    .setLocalizedName("Future Self F")
+    .setPartyTemplates(new TrainerPartyTemplate(6, PartyMemberStrength.STRONG))
 };
 

src/enums/trainer-type.ts

@@ -116,6 +116,8 @@ export enum TrainerType {
   VITO,
   BUG_TYPE_SUPERFAN,
   EXPERT_POKEMON_BREEDER,
+  FUTURE_SELF_M,
+  FUTURE_SELF_F,
 
   BROCK = 200,
   MISTY,

src/field/pokemon.ts

@@ -93,7 +93,6 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   public stats: integer[];
   public ivs: integer[];
   public nature: Nature;
-  public natureOverride: Nature | -1;
   public moveset: (PokemonMove | null)[];
   public status: Status | null;
   public friendship: integer;
@@ -4283,7 +4282,6 @@ export class PlayerPokemon extends Pokemon {
 
       if (newEvolution.condition?.predicate(this)) {
         const newPokemon = this.scene.addPlayerPokemon(this.species, this.level, this.abilityIndex, this.formIndex, undefined, this.shiny, this.variant, this.ivs, this.nature);
-        newPokemon.natureOverride = this.natureOverride;
         newPokemon.passive = this.passive;
         newPokemon.moveset = this.moveset.slice();
         newPokemon.moveset = this.copyMoveset();

src/modifier/modifier-type.ts

@@ -10,7 +10,9 @@ import { getStatusEffectDescriptor, StatusEffect } from "#app/data/status-effect
 import { Type } from "#app/data/type";
 import Pokemon, { EnemyPokemon, PlayerPokemon, PokemonMove } from "#app/field/pokemon";
 import { getPokemonNameWithAffix } from "#app/messages";
-import { AddPokeballModifier, AddVoucherModifier, AttackTypeBoosterModifier, BaseStatModifier, BerryModifier, BoostBugSpawnModifier, BypassSpeedChanceModifier, ContactHeldItemTransferChanceModifier, CritBoosterModifier, DamageMoneyRewardModifier, DoubleBattleChanceBoosterModifier, EnemyAttackStatusEffectChanceModifier, EnemyDamageBoosterModifier, EnemyDamageReducerModifier, EnemyEndureChanceModifier, EnemyFusionChanceModifier, EnemyStatusEffectHealChanceModifier, EnemyTurnHealModifier, EvolutionItemModifier, EvolutionStatBoosterModifier, EvoTrackerModifier, ExpBalanceModifier, ExpBoosterModifier, ExpShareModifier, ExtraModifierModifier, FlinchChanceModifier, FusePokemonModifier, GigantamaxAccessModifier, HealingBoosterModifier, HealShopCostModifier, HiddenAbilityRateBoosterModifier, HitHealModifier, IvScannerModifier, LevelIncrementBoosterModifier, LockModifierTiersModifier, MapModifier, MegaEvolutionAccessModifier, MoneyInterestModifier, MoneyMultiplierModifier, MoneyRewardModifier, MultipleParticipantExpBonusModifier, PokemonAllMovePpRestoreModifier, PokemonBaseStatFlatModifier, PokemonBaseStatTotalModifier, PokemonExpBoosterModifier, PokemonFormChangeItemModifier, PokemonFriendshipBoosterModifier, PokemonHeldItemModifier, PokemonHpRestoreModifier, PokemonIncrementingStatModifier, PokemonInstantReviveModifier, PokemonLevelIncrementModifier, PokemonMoveAccuracyBoosterModifier, PokemonMultiHitModifier, PokemonNatureChangeModifier, PokemonNatureWeightModifier, PokemonPpRestoreModifier, PokemonPpUpModifier, PokemonStatusHealModifier, PreserveBerryModifier, RememberMoveModifier, ResetNegativeStatStageModifier, ShinyRateBoosterModifier, SpeciesCritBoosterModifier, SpeciesStatBoosterModifier, SurviveDamageModifier, SwitchEffectTransferModifier, TempCritBoosterModifier, TempStatStageBoosterModifier, TerastallizeAccessModifier, TerastallizeModifier, TmModifier, TurnHealModifier, TurnHeldItemTransferModifier, TurnStatusEffectModifier, type EnemyPersistentModifier, type Modifier, type PersistentModifier } from "#app/modifier/modifier";
+import {
+  AddPokeballModifier, AddVoucherModifier, AttackTypeBoosterModifier, BaseStatModifier, BerryModifier, BoostBugSpawnModifier, BypassSpeedChanceModifier, ContactHeldItemTransferChanceModifier, CritBoosterModifier, DamageMoneyRewardModifier, DoubleBattleChanceBoosterModifier, EnemyAttackStatusEffectChanceModifier, EnemyDamageBoosterModifier, EnemyDamageReducerModifier, EnemyEndureChanceModifier, EnemyFusionChanceModifier, EnemyStatusEffectHealChanceModifier, EnemyTurnHealModifier, EvolutionItemModifier, EvolutionStatBoosterModifier, EvoTrackerModifier, ExpBalanceModifier, ExpBoosterModifier, ExpShareModifier, ExtraModifierModifier, FlinchChanceModifier, FusePokemonModifier, GigantamaxAccessModifier, HealingBoosterModifier, HealShopCostModifier, HiddenAbilityRateBoosterModifier, HitHealModifier, IvScannerModifier, LevelIncrementBoosterModifier, LockModifierTiersModifier, MapModifier, MegaEvolutionAccessModifier, MoneyInterestModifier, MoneyMultiplierModifier, MoneyRewardModifier, MultipleParticipantExpBonusModifier, PokemonAllMovePpRestoreModifier, PokemonBaseStatFlatModifier, PokemonBaseStatTotalModifier, PokemonExpBoosterModifier, PokemonFormChangeItemModifier, PokemonFriendshipBoosterModifier, PokemonHeldItemModifier, PokemonHpRestoreModifier, PokemonIncrementingStatModifier, PokemonInstantReviveModifier, PokemonLevelIncrementModifier, PokemonMoveAccuracyBoosterModifier, PokemonMultiHitModifier, PokemonNatureChangeModifier, PokemonNatureWeightModifier, PokemonPpRestoreModifier, PokemonPpUpModifier, PokemonStatusHealModifier, PreserveBerryModifier, RememberMoveModifier, ResetNegativeStatStageModifier, ShinyRateBoosterModifier, SpeciesCritBoosterModifier, SpeciesStatBoosterModifier, SurviveDamageModifier, SwitchEffectTransferModifier, TempCritBoosterModifier, TempStatStageBoosterModifier, TerastallizeAccessModifier, TerastallizeModifier, TmModifier, TurnHealModifier, TurnHeldItemTransferModifier, TurnStatusEffectModifier, type EnemyPersistentModifier, type Modifier, type PersistentModifier, TempExtraModifierModifier
+} from "#app/modifier/modifier";
 import { ModifierTier } from "#app/modifier/modifier-tier";
 import Overrides from "#app/overrides";
 import { Unlockables } from "#app/system/unlockables";
@@ -1561,6 +1563,7 @@ export const modifierTypes = {
   VOUCHER_PREMIUM: () => new AddVoucherModifierType(VoucherType.PREMIUM, 1),
 
   GOLDEN_POKEBALL: () => new ModifierType("modifierType:ModifierType.GOLDEN_POKEBALL", "pb_gold", (type, _args) => new ExtraModifierModifier(type), undefined, "se/pb_bounce_1"),
+  SILVER_POKEBALL: () => new ModifierType("modifierType:ModifierType.SILVER_POKEBALL", "pb_silver", (type, _args) => new TempExtraModifierModifier(type, 100), undefined, "se/pb_bounce_1"),
 
   ENEMY_DAMAGE_BOOSTER: () => new ModifierType("modifierType:ModifierType.ENEMY_DAMAGE_BOOSTER", "wl_item_drop", (type, _args) => new EnemyDamageBoosterModifier(type, 5)),
   ENEMY_DAMAGE_REDUCTION: () => new ModifierType("modifierType:ModifierType.ENEMY_DAMAGE_REDUCTION", "wl_guard_spec", (type, _args) => new EnemyDamageReducerModifier(type, 2.5)),
@@ -1577,13 +1580,13 @@ export const modifierTypes = {
     if (pregenArgs) {
       return new PokemonBaseStatTotalModifierType(pregenArgs[0] as number);
     }
-    return new PokemonBaseStatTotalModifierType(randSeedInt(20));
+    return new PokemonBaseStatTotalModifierType(randSeedInt(20, 1));
   }),
   MYSTERY_ENCOUNTER_OLD_GATEAU: () => new ModifierTypeGenerator((party: Pokemon[], pregenArgs?: any[]) => {
     if (pregenArgs) {
       return new PokemonBaseStatFlatModifierType(pregenArgs[0] as number, pregenArgs[1] as Stat[]);
     }
-    return new PokemonBaseStatFlatModifierType(randSeedInt(20), [ Stat.HP, Stat.ATK, Stat.DEF ]);
+    return new PokemonBaseStatFlatModifierType(randSeedInt(20, 1), [ Stat.HP, Stat.ATK, Stat.DEF ]);
   }),
   MYSTERY_ENCOUNTER_BLACK_SLUDGE: () => new ModifierTypeGenerator((party: Pokemon[], pregenArgs?: any[]) => {
     if (pregenArgs) {

src/modifier/modifier.ts

@@ -404,6 +404,14 @@ export abstract class LapsingPersistentModifier extends PersistentModifier {
     this.battleCount = this.maxBattles;
   }
 
+  /**
+   * Updates an existing modifier with a new `maxBattles` and `battleCount`.
+   */
+  setNewBattleCount(count: number): void {
+    this.maxBattles = count;
+    this.battleCount = count;
+  }
+
   getMaxBattles(): number {
     return this.maxBattles;
   }
@@ -960,7 +968,7 @@ export class EvoTrackerModifier extends PokemonHeldItemModifier {
 
     this.stackCount = pokemon
       ? pokemon.evoCounter + pokemon.getHeldItems().filter(m => m instanceof DamageMoneyRewardModifier).length
-        + pokemon.scene.findModifiers(m => m instanceof MoneyMultiplierModifier || m instanceof ExtraModifierModifier).length
+        + pokemon.scene.findModifiers(m => m instanceof MoneyMultiplierModifier || m instanceof ExtraModifierModifier || m instanceof TempExtraModifierModifier).length
       : this.stackCount;
 
     const text = scene.add.bitmapText(10, 15, "item-count", this.stackCount.toString(), 11);
@@ -975,7 +983,7 @@ export class EvoTrackerModifier extends PokemonHeldItemModifier {
 
   getMaxHeldItemCount(pokemon: Pokemon): number {
     this.stackCount = pokemon.evoCounter + pokemon.getHeldItems().filter(m => m instanceof DamageMoneyRewardModifier).length
-      + pokemon.scene.findModifiers(m => m instanceof MoneyMultiplierModifier || m instanceof ExtraModifierModifier).length;
+      + pokemon.scene.findModifiers(m => m instanceof MoneyMultiplierModifier || m instanceof ExtraModifierModifier || m instanceof TempExtraModifierModifier).length;
     return 999;
   }
 }
@@ -3288,6 +3296,60 @@ export class ExtraModifierModifier extends PersistentModifier {
   }
 }
 
+/**
+ * Modifier used for timed boosts to the player's shop item rewards.
+ * @extends LapsingPersistentModifier
+ * @see {@linkcode apply}
+ */
+export class TempExtraModifierModifier extends LapsingPersistentModifier {
+  constructor(type: ModifierType, maxBattles: number, battleCount?: number, stackCount?: number) {
+    super(type, maxBattles, battleCount, stackCount);
+  }
+
+  /**
+   * Goes through existing modifiers for any that match Silver Pokeball,
+   * which will then add the max count of the new item to the existing count of the current item.
+   * If no existing Silver Pokeballs are found, will add a new one.
+   * @param modifiers {@linkcode PersistentModifier} array of the player's modifiers
+   * @param _virtual N/A
+   * @param scene
+   * @returns true if the modifier was successfully added or applied, false otherwise
+   */
+  add(modifiers: PersistentModifier[], _virtual: boolean, scene: BattleScene): boolean {
+    for (const modifier of modifiers) {
+      if (this.match(modifier)) {
+        const modifierInstance = modifier as TempExtraModifierModifier;
+        const newBattleCount = this.getMaxBattles() + modifierInstance.getBattleCount();
+
+        modifierInstance.setNewBattleCount(newBattleCount);
+        scene.playSound("se/restore");
+        return true;
+      }
+    }
+
+    modifiers.push(this);
+    return true;
+  }
+
+  clone() {
+    return new TempExtraModifierModifier(this.type, this.getMaxBattles(), this.getBattleCount(), this.stackCount);
+  }
+
+  match(modifier: Modifier): boolean {
+    return (modifier instanceof TempExtraModifierModifier);
+  }
+
+  /**
+   * Increases the current rewards in the battle by the `stackCount`.
+   * @returns `true` if the shop reward number modifier applies successfully
+   * @param count {@linkcode NumberHolder} that holds the resulting shop item reward count
+   */
+  apply(count: NumberHolder): boolean {
+    count.value += this.getStackCount();
+    return true;
+  }
+}
+
 export abstract class EnemyPersistentModifier extends PersistentModifier {
   constructor(type: ModifierType, stackCount?: number) {
     super(type, stackCount);

src/phases/select-modifier-phase.ts

@@ -1,7 +1,7 @@
 import BattleScene from "#app/battle-scene";
 import { ModifierTier } from "#app/modifier/modifier-tier";
 import { regenerateModifierPoolThresholds, ModifierTypeOption, ModifierType, getPlayerShopModifierTypeOptionsForWave, PokemonModifierType, FusePokemonModifierType, PokemonMoveModifierType, TmModifierType, RememberMoveModifierType, PokemonPpRestoreModifierType, PokemonPpUpModifierType, ModifierPoolType, getPlayerModifierTypeOptions } from "#app/modifier/modifier-type";
-import { ExtraModifierModifier, HealShopCostModifier, Modifier, PokemonHeldItemModifier } from "#app/modifier/modifier";
+import { ExtraModifierModifier, HealShopCostModifier, Modifier, PokemonHeldItemModifier, TempExtraModifierModifier } from "#app/modifier/modifier";
 import ModifierSelectUiHandler, { SHOP_OPTIONS_ROW_LIMIT } from "#app/ui/modifier-select-ui-handler";
 import PartyUiHandler, { PartyUiMode, PartyOption } from "#app/ui/party-ui-handler";
 import { Mode } from "#app/ui/ui";
@@ -45,6 +45,7 @@ export class SelectModifierPhase extends BattlePhase {
     const modifierCount = new Utils.IntegerHolder(3);
     if (this.isPlayer()) {
       this.scene.applyModifiers(ExtraModifierModifier, true, modifierCount);
+      this.scene.applyModifiers(TempExtraModifierModifier, true, modifierCount);
     }
 
     // If custom modifiers are specified, overrides default item count
@@ -274,7 +275,13 @@ export class SelectModifierPhase extends BattlePhase {
       // Otherwise, continue with custom multiplier
       multiplier = this.customModifierSettings.rerollMultiplier;
     }
-    return Math.min(Math.ceil(this.scene.currentBattle.waveIndex / 10) * baseValue * Math.pow(2, this.rerollCount) * multiplier, Number.MAX_SAFE_INTEGER);
+
+    const baseMultiplier = Math.min(Math.ceil(this.scene.currentBattle.waveIndex / 10) * baseValue * (2 ** this.rerollCount) * multiplier, Number.MAX_SAFE_INTEGER);
+
+    // Apply Black Sludge to reroll cost
+    const modifiedRerollCost = new NumberHolder(baseMultiplier);
+    this.scene.applyModifier(HealShopCostModifier, true, modifiedRerollCost);
+    return modifiedRerollCost.value;
   }
 
   getPoolType(): ModifierPoolType {

src/phases/victory-phase.ts

@@ -25,12 +25,17 @@ export class VictoryPhase extends PokemonPhase {
   start() {
     super.start();
 
+    const isMysteryEncounter = this.scene.currentBattle.isBattleMysteryEncounter();
+
+    // update Pokemon defeated count except for MEs that disable it
+    if (!isMysteryEncounter || !this.scene.currentBattle.mysteryEncounter?.preventGameStatsUpdates) {
       this.scene.gameData.gameStats.pokemonDefeated++;
+    }
 
     const expValue = this.getPokemon().getExpValue();
     this.scene.applyPartyExp(expValue, true);
 
-    if (this.scene.currentBattle.isBattleMysteryEncounter()) {
+    if (isMysteryEncounter) {
       handleMysteryEncounterVictory(this.scene, false, this.isExpOnly);
       return this.end();
     }

src/system/game-data.ts

@@ -1569,6 +1569,10 @@ export class GameData {
   }
 
   setPokemonSeen(pokemon: Pokemon, incrementCount: boolean = true, trainer: boolean = false): void {
+    // Some Mystery Encounters block updates to these stats
+    if (this.scene.currentBattle?.isBattleMysteryEncounter() && this.scene.currentBattle.mysteryEncounter?.preventGameStatsUpdates) {
+      return;
+    }
     const dexEntry = this.dexData[pokemon.species.speciesId];
     dexEntry.seenAttr |= pokemon.getDexAttr();
     if (incrementCount) {

src/system/pokemon-data.ts

@@ -92,7 +92,6 @@ export default class PokemonData {
     this.stats = source.stats;
     this.ivs = source.ivs;
     this.nature = source.nature !== undefined ? source.nature : 0 as Nature;
-    this.natureOverride = source.natureOverride !== undefined ? source.natureOverride : -1;
     this.friendship = source.friendship !== undefined ? source.friendship : getPokemonSpecies(this.species).baseFriendship;
     this.metLevel = source.metLevel || 5;
     this.metBiome = source.metBiome !== undefined ? source.metBiome : -1;
@@ -117,6 +116,8 @@ export default class PokemonData {
 
     this.customPokemonData = new CustomPokemonData(source.customPokemonData);
 
+    // Deprecated, but needed for session data migration
+    this.natureOverride = source.natureOverride;
     this.mysteryEncounterPokemonData = new CustomPokemonData(source.mysteryEncounterPokemonData);
     this.fusionMysteryEncounterPokemonData = new CustomPokemonData(source.fusionMysteryEncounterPokemonData);
 

src/test/mystery-encounter/encounters/delibirdy-encounter.test.ts

@@ -206,7 +206,7 @@ describe("Delibird-y - Mystery Encounter", () => {
       expect(candyJarAfter?.stackCount).toBe(1);
     });
 
-    it("Should remove Reviver Seed and give the player a Healing Charm", async () => {
+    it("Should remove Reviver Seed and give the player a Berry Pouch", async () => {
       await game.runToMysteryEncounter(MysteryEncounterType.DELIBIRDY, defaultParty);
 
       // Set 1 Reviver Seed on party lead
@@ -220,11 +220,11 @@ describe("Delibird-y - Mystery Encounter", () => {
       await runMysteryEncounterToEnd(game, 2, { pokemonNo: 1, optionNo: 1 });
 
       const reviverSeedAfter = scene.findModifier(m => m instanceof PokemonInstantReviveModifier);
-      const healingCharmAfter = scene.findModifier(m => m instanceof HealingBoosterModifier);
+      const berryPouchAfter = scene.findModifier(m => m instanceof PreserveBerryModifier);
 
       expect(reviverSeedAfter).toBeUndefined();
-      expect(healingCharmAfter).toBeDefined();
-      expect(healingCharmAfter?.stackCount).toBe(1);
+      expect(berryPouchAfter).toBeDefined();
+      expect(berryPouchAfter?.stackCount).toBe(1);
     });
 
     it("Should give the player a Shell Bell if they have max stacks of Candy Jars", async () => {
@@ -256,13 +256,13 @@ describe("Delibird-y - Mystery Encounter", () => {
       expect(shellBellAfter?.stackCount).toBe(1);
     });
 
-    it("Should give the player a Shell Bell if they have max stacks of Healing Charms", async () => {
+    it("Should give the player a Shell Bell if they have max stacks of Berry Pouches", async () => {
       await game.runToMysteryEncounter(MysteryEncounterType.DELIBIRDY, defaultParty);
 
-      // 5 Healing Charms
+      // 3 Berry Pouches
       scene.modifiers = [];
-      const healingCharm = generateModifierType(scene, modifierTypes.HEALING_CHARM)!.newModifier() as HealingBoosterModifier;
-      healingCharm.stackCount = 5;
+      const healingCharm = generateModifierType(scene, modifierTypes.BERRY_POUCH)!.newModifier() as PreserveBerryModifier;
+      healingCharm.stackCount = 3;
       await scene.addModifier(healingCharm, true, false, false, true);
 
       // Set 1 Reviver Seed on party lead
@@ -275,12 +275,12 @@ describe("Delibird-y - Mystery Encounter", () => {
       await runMysteryEncounterToEnd(game, 2, { pokemonNo: 1, optionNo: 1 });
 
       const reviverSeedAfter = scene.findModifier(m => m instanceof PokemonInstantReviveModifier);
-      const healingCharmAfter = scene.findModifier(m => m instanceof HealingBoosterModifier);
+      const healingCharmAfter = scene.findModifier(m => m instanceof PreserveBerryModifier);
       const shellBellAfter = scene.findModifier(m => m instanceof HitHealModifier);
 
       expect(reviverSeedAfter).toBeUndefined();
       expect(healingCharmAfter).toBeDefined();
-      expect(healingCharmAfter?.stackCount).toBe(5);
+      expect(healingCharmAfter?.stackCount).toBe(3);
       expect(shellBellAfter).toBeDefined();
       expect(shellBellAfter?.stackCount).toBe(1);
     });
@@ -347,7 +347,7 @@ describe("Delibird-y - Mystery Encounter", () => {
       });
     });
 
-    it("Should decrease held item stacks and give the player a Berry Pouch", async () => {
+    it("Should decrease held item stacks and give the player a Healing Charm", async () => {
       await game.runToMysteryEncounter(MysteryEncounterType.DELIBIRDY, defaultParty);
 
       // Set 2 Soul Dew on party lead
@@ -361,14 +361,14 @@ describe("Delibird-y - Mystery Encounter", () => {
       await runMysteryEncounterToEnd(game, 3, { pokemonNo: 1, optionNo: 1 });
 
       const soulDewAfter = scene.findModifier(m => m instanceof PokemonNatureWeightModifier);
-      const berryPouchAfter = scene.findModifier(m => m instanceof PreserveBerryModifier);
+      const healingCharmAfter = scene.findModifier(m => m instanceof HealingBoosterModifier);
 
       expect(soulDewAfter?.stackCount).toBe(1);
-      expect(berryPouchAfter).toBeDefined();
-      expect(berryPouchAfter?.stackCount).toBe(1);
+      expect(healingCharmAfter).toBeDefined();
+      expect(healingCharmAfter?.stackCount).toBe(1);
     });
 
-    it("Should remove held item and give the player a Berry Pouch", async () => {
+    it("Should remove held item and give the player a Healing Charm", async () => {
       await game.runToMysteryEncounter(MysteryEncounterType.DELIBIRDY, defaultParty);
 
       // Set 1 Soul Dew on party lead
@@ -382,20 +382,20 @@ describe("Delibird-y - Mystery Encounter", () => {
       await runMysteryEncounterToEnd(game, 3, { pokemonNo: 1, optionNo: 1 });
 
       const soulDewAfter = scene.findModifier(m => m instanceof PokemonNatureWeightModifier);
-      const berryPouchAfter = scene.findModifier(m => m instanceof PreserveBerryModifier);
+      const healingCharmAfter = scene.findModifier(m => m instanceof HealingBoosterModifier);
 
       expect(soulDewAfter).toBeUndefined();
-      expect(berryPouchAfter).toBeDefined();
-      expect(berryPouchAfter?.stackCount).toBe(1);
+      expect(healingCharmAfter).toBeDefined();
+      expect(healingCharmAfter?.stackCount).toBe(1);
     });
 
-    it("Should give the player a Shell Bell if they have max stacks of Berry Pouches", async () => {
+    it("Should give the player a Shell Bell if they have max stacks of Healing Charms", async () => {
       await game.runToMysteryEncounter(MysteryEncounterType.DELIBIRDY, defaultParty);
 
       // 5 Healing Charms
       scene.modifiers = [];
-      const healingCharm = generateModifierType(scene, modifierTypes.BERRY_POUCH)!.newModifier() as PreserveBerryModifier;
-      healingCharm.stackCount = 3;
+      const healingCharm = generateModifierType(scene, modifierTypes.HEALING_CHARM)!.newModifier() as HealingBoosterModifier;
+      healingCharm.stackCount = 5;
       await scene.addModifier(healingCharm, true, false, false, true);
 
       // Set 1 Soul Dew on party lead
@@ -408,12 +408,12 @@ describe("Delibird-y - Mystery Encounter", () => {
       await runMysteryEncounterToEnd(game, 3, { pokemonNo: 1, optionNo: 1 });
 
       const soulDewAfter = scene.findModifier(m => m instanceof PokemonNatureWeightModifier);
-      const berryPouchAfter = scene.findModifier(m => m instanceof PreserveBerryModifier);
+      const healingCharmAfter = scene.findModifier(m => m instanceof HealingBoosterModifier);
       const shellBellAfter = scene.findModifier(m => m instanceof HitHealModifier);
 
       expect(soulDewAfter).toBeUndefined();
-      expect(berryPouchAfter).toBeDefined();
-      expect(berryPouchAfter?.stackCount).toBe(3);
+      expect(healingCharmAfter).toBeDefined();
+      expect(healingCharmAfter?.stackCount).toBe(5);
       expect(shellBellAfter).toBeDefined();
       expect(shellBellAfter?.stackCount).toBe(1);
     });

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

@@ -12,7 +12,7 @@ import * as EncounterPhaseUtils from "#app/data/mystery-encounters/utils/encount
 import { runMysteryEncounterToEnd, runSelectMysteryEncounterOption, skipBattleRunMysteryEncounterRewardsPhase } from "#test/mystery-encounter/encounter-test-utils";
 import { Moves } from "#enums/moves";
 import BattleScene from "#app/battle-scene";
-import { PokemonHeldItemModifier } from "#app/modifier/modifier";
+import { AttackTypeBoosterModifier, PokemonHeldItemModifier } from "#app/modifier/modifier";
 import { Type } from "#app/data/type";
 import { Status, StatusEffect } from "#app/data/status-effect";
 import { MysteryEncounterPhase } from "#app/phases/mystery-encounter-phases";
@@ -22,6 +22,8 @@ import { initSceneWithoutEncounterPhase } from "#test/utils/gameManagerUtils";
 import { CommandPhase } from "#app/phases/command-phase";
 import { MovePhase } from "#app/phases/move-phase";
 import { SelectModifierPhase } from "#app/phases/select-modifier-phase";
+import { BattlerTagType } from "#enums/battler-tag-type";
+import { Abilities } from "#enums/abilities";
 import i18next from "i18next";
 
 const namespace = "mysteryEncounters/fieryFallout";
@@ -42,10 +44,11 @@ describe("Fiery Fallout - Mystery Encounter", () => {
   beforeEach(async () => {
     game = new GameManager(phaserGame);
     scene = game.scene;
-    game.override.mysteryEncounterChance(100);
-    game.override.startingWave(defaultWave);
-    game.override.startingBiome(defaultBiome);
-    game.override.disableTrainerWaves();
+    game.override.mysteryEncounterChance(100)
+      .startingWave(defaultWave)
+      .startingBiome(defaultBiome)
+      .disableTrainerWaves()
+      .moveset([ Moves.PAYBACK, Moves.THUNDERBOLT ]); // Required for attack type booster item generation
 
     vi.spyOn(MysteryEncounters, "mysteryEncountersByBiome", "get").mockReturnValue(
       new Map<Biome, MysteryEncounterType[]>([
@@ -109,12 +112,16 @@ describe("Fiery Fallout - Mystery Encounter", () => {
           {
             species: getPokemonSpecies(Species.VOLCARONA),
             isBoss: false,
-            gender: Gender.MALE
+            gender: Gender.MALE,
+            tags: [ BattlerTagType.MYSTERY_ENCOUNTER_POST_SUMMON ],
+            mysteryEncounterBattleEffects: expect.any(Function)
           },
           {
             species: getPokemonSpecies(Species.VOLCARONA),
             isBoss: false,
-            gender: Gender.FEMALE
+            gender: Gender.FEMALE,
+            tags: [ BattlerTagType.MYSTERY_ENCOUNTER_POST_SUMMON ],
+            mysteryEncounterBattleEffects: expect.any(Function)
           }
         ],
         doubleBattle: true,
@@ -157,12 +164,11 @@ describe("Fiery Fallout - Mystery Encounter", () => {
       expect(enemyField[0].gender).not.toEqual(enemyField[1].gender); // Should be opposite gender
 
       const movePhases = phaseSpy.mock.calls.filter(p => p[0] instanceof MovePhase).map(p => p[0]);
-      expect(movePhases.length).toBe(4);
+      expect(movePhases.length).toBe(2);
       expect(movePhases.filter(p => (p as MovePhase).move.moveId === Moves.FIRE_SPIN).length).toBe(2); // Fire spin used twice before battle
-      expect(movePhases.filter(p => (p as MovePhase).move.moveId === Moves.QUIVER_DANCE).length).toBe(2); // Quiver Dance used twice before battle
     });
 
-    it("should give charcoal to lead pokemon", async () => {
+    it("should give attack type boosting item to lead pokemon", async () => {
       await game.runToMysteryEncounter(MysteryEncounterType.FIERY_FALLOUT, defaultParty);
       await runMysteryEncounterToEnd(game, 1, undefined, true);
       await skipBattleRunMysteryEncounterRewardsPhase(game);
@@ -172,8 +178,8 @@ describe("Fiery Fallout - Mystery Encounter", () => {
       const leadPokemonId = scene.getParty()?.[0].id;
       const leadPokemonItems = scene.findModifiers(m => m instanceof PokemonHeldItemModifier
         && (m as PokemonHeldItemModifier).pokemonId === leadPokemonId, true) as PokemonHeldItemModifier[];
-      const charcoal = leadPokemonItems.find(i => i.type.name === "Charcoal");
-      expect(charcoal).toBeDefined;
+      const item = leadPokemonItems.find(i => i instanceof AttackTypeBoosterModifier);
+      expect(item).toBeDefined;
     });
   });
 
@@ -193,7 +199,7 @@ describe("Fiery Fallout - Mystery Encounter", () => {
       });
     });
 
-    it("should damage all non-fire party PKM by 20% and randomly burn 1", async () => {
+    it("should damage all non-fire party PKM by 20%, and burn + give Heatproof to a random Pokemon", async () => {
       await game.runToMysteryEncounter(MysteryEncounterType.FIERY_FALLOUT, defaultParty);
 
       const party = scene.getParty();
@@ -210,7 +216,8 @@ describe("Fiery Fallout - Mystery Encounter", () => {
       burnablePokemon.forEach((pkm) => {
         expect(pkm.hp, `${pkm.name} should have received 20% damage: ${pkm.hp} / ${pkm.getMaxHp()} HP`).toBe(pkm.getMaxHp() - Math.floor(pkm.getMaxHp() * 0.2));
       });
-      expect(burnablePokemon.some(pkm => pkm?.status?.effect === StatusEffect.BURN)).toBeTruthy();
+      expect(burnablePokemon.some(pkm => pkm.status?.effect === StatusEffect.BURN)).toBeTruthy();
+      expect(burnablePokemon.some(pkm => pkm.customPokemonData.ability === Abilities.HEATPROOF));
       notBurnablePokemon.forEach((pkm) => expect(pkm.hp, `${pkm.name} should be full hp: ${pkm.hp} / ${pkm.getMaxHp()} HP`).toBe(pkm.getMaxHp()));
     });
 
@@ -241,17 +248,15 @@ describe("Fiery Fallout - Mystery Encounter", () => {
       });
     });
 
-    it("should give charcoal to lead pokemon", async () => {
+    it("should give attack type boosting item to lead pokemon", async () => {
       await game.runToMysteryEncounter(MysteryEncounterType.FIERY_FALLOUT, defaultParty);
       await runMysteryEncounterToEnd(game, 3);
       await game.phaseInterceptor.to(SelectModifierPhase, false);
       expect(scene.getCurrentPhase()?.constructor.name).toBe(SelectModifierPhase.name);
 
-      const leadPokemonId = scene.getParty()?.[0].id;
-      const leadPokemonItems = scene.findModifiers(m => m instanceof PokemonHeldItemModifier
-        && (m as PokemonHeldItemModifier).pokemonId === leadPokemonId, true) as PokemonHeldItemModifier[];
-      const charcoal = leadPokemonItems.find(i => i.type.name === "Charcoal");
-      expect(charcoal).toBeDefined;
+      const leadPokemonItems = scene.getParty()?.[0].getHeldItems() as PokemonHeldItemModifier[];
+      const item = leadPokemonItems.find(i => i instanceof AttackTypeBoosterModifier);
+      expect(item).toBeDefined;
     });
 
     it("should leave encounter without battle", async () => {
@@ -264,7 +269,7 @@ describe("Fiery Fallout - Mystery Encounter", () => {
     });
 
     it("should be disabled if not enough FIRE types are in party", async () => {
-      await game.runToMysteryEncounter(MysteryEncounterType.FIERY_FALLOUT, [ Species.MAGIKARP, Species.ARCANINE ]);
+      await game.runToMysteryEncounter(MysteryEncounterType.FIERY_FALLOUT, [ Species.MAGIKARP ]);
       await game.phaseInterceptor.to(MysteryEncounterPhase, false);
 
       const encounterPhase = scene.getCurrentPhase();

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

@@ -86,7 +86,7 @@ describe("Trash to Treasure - Mystery Encounter", () => {
 
     expect(TrashToTreasureEncounter.enemyPartyConfigs).toEqual([
       {
-        levelAdditiveModifier: 1,
+        levelAdditiveModifier: 0.5,
         disableSwitch: true,
         pokemonConfigs: [
           {

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

@@ -5,7 +5,7 @@ import { Species } from "#app/enums/species";
 import GameManager from "#app/test/utils/gameManager";
 import { afterEach, beforeAll, beforeEach, describe, expect, it, vi } from "vitest";
 import * as EncounterPhaseUtils from "#app/data/mystery-encounters/utils/encounter-phase-utils";
-import { runMysteryEncounterToEnd } from "#test/mystery-encounter/encounter-test-utils";
+import { runMysteryEncounterToEnd, skipBattleRunMysteryEncounterRewardsPhase } from "#test/mystery-encounter/encounter-test-utils";
 import BattleScene from "#app/battle-scene";
 import { Mode } from "#app/ui/ui";
 import ModifierSelectUiHandler from "#app/ui/modifier-select-ui-handler";
@@ -15,6 +15,8 @@ import { initSceneWithoutEncounterPhase } from "#test/utils/gameManagerUtils";
 import { WeirdDreamEncounter } from "#app/data/mystery-encounters/encounters/weird-dream-encounter";
 import * as EncounterTransformationSequence from "#app/data/mystery-encounters/utils/encounter-transformation-sequence";
 import { SelectModifierPhase } from "#app/phases/select-modifier-phase";
+import { CommandPhase } from "#app/phases/command-phase";
+import { ModifierTier } from "#app/modifier/modifier-tier";
 
 const namespace = "mysteryEncounters/weirdDream";
 const defaultParty = [ Species.MAGBY, Species.HAUNTER, Species.ABRA ];
@@ -70,7 +72,7 @@ describe("Weird Dream - Mystery Encounter", () => {
     expect(WeirdDreamEncounter.dialogue.encounterOptionsDialogue?.title).toBe(`${namespace}:title`);
     expect(WeirdDreamEncounter.dialogue.encounterOptionsDialogue?.description).toBe(`${namespace}:description`);
     expect(WeirdDreamEncounter.dialogue.encounterOptionsDialogue?.query).toBe(`${namespace}:query`);
-    expect(WeirdDreamEncounter.options.length).toBe(2);
+    expect(WeirdDreamEncounter.options.length).toBe(3);
   });
 
   it("should initialize fully", async () => {
@@ -132,7 +134,7 @@ describe("Weird Dream - Mystery Encounter", () => {
       expect(plus40To50.length).toBe(1);
     });
 
-    it("should have 1 Memory Mushroom, 5 Rogue Balls, and 2 Mints in rewards", async () => {
+    it("should have 1 Memory Mushroom, 5 Rogue Balls, and 3 Mints in rewards", async () => {
       await game.runToMysteryEncounter(MysteryEncounterType.WEIRD_DREAM, defaultParty);
       await runMysteryEncounterToEnd(game, 1);
       await game.phaseInterceptor.to(SelectModifierPhase, false);
@@ -141,11 +143,12 @@ describe("Weird Dream - 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(4);
+      expect(modifierSelectHandler.options.length).toEqual(5);
       expect(modifierSelectHandler.options[0].modifierTypeOption.type.id).toEqual("MEMORY_MUSHROOM");
       expect(modifierSelectHandler.options[1].modifierTypeOption.type.id).toEqual("ROGUE_BALL");
       expect(modifierSelectHandler.options[2].modifierTypeOption.type.id).toEqual("MINT");
       expect(modifierSelectHandler.options[3].modifierTypeOption.type.id).toEqual("MINT");
+      expect(modifierSelectHandler.options[3].modifierTypeOption.type.id).toEqual("MINT");
     });
 
     it("should leave encounter without battle", async () => {
@@ -158,7 +161,7 @@ describe("Weird Dream - Mystery Encounter", () => {
     });
   });
 
-  describe("Option 2 - Leave", () => {
+  describe("Option 2 - Battle Future Self", () => {
     it("should have the correct properties", () => {
       const option = WeirdDreamEncounter.options[1];
       expect(option.optionMode).toBe(MysteryEncounterOptionMode.DEFAULT);
@@ -174,17 +177,63 @@ describe("Weird Dream - Mystery Encounter", () => {
       });
     });
 
-    it("should reduce party levels by 12.5%", async () => {
+    it("should start a battle against the player's transformation team", async () => {
+      await game.runToMysteryEncounter(MysteryEncounterType.WEIRD_DREAM, defaultParty);
+      await runMysteryEncounterToEnd(game, 2, undefined, true);
+
+      const enemyField = scene.getEnemyField();
+      expect(scene.getCurrentPhase()?.constructor.name).toBe(CommandPhase.name);
+      expect(enemyField.length).toBe(1);
+      expect(scene.getEnemyParty().length).toBe(scene.getParty().length);
+    });
+
+    it("should have 2 Rogue/2 Ultra/2 Great items in rewards", async () => {
+      await game.runToMysteryEncounter(MysteryEncounterType.WEIRD_DREAM, defaultParty);
+      await runMysteryEncounterToEnd(game, 2, undefined, true);
+      await skipBattleRunMysteryEncounterRewardsPhase(game);
+      await game.phaseInterceptor.to(SelectModifierPhase, false);
+      expect(scene.getCurrentPhase()?.constructor.name).toBe(SelectModifierPhase.name);
+      await game.phaseInterceptor.run(SelectModifierPhase);
+
+      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(6);
+      expect(modifierSelectHandler.options[0].modifierTypeOption.type.tier - modifierSelectHandler.options[0].modifierTypeOption.upgradeCount).toEqual(ModifierTier.ROGUE);
+      expect(modifierSelectHandler.options[1].modifierTypeOption.type.tier - modifierSelectHandler.options[1].modifierTypeOption.upgradeCount).toEqual(ModifierTier.ROGUE);
+      expect(modifierSelectHandler.options[2].modifierTypeOption.type.tier - modifierSelectHandler.options[2].modifierTypeOption.upgradeCount).toEqual(ModifierTier.ULTRA);
+      expect(modifierSelectHandler.options[3].modifierTypeOption.type.tier - modifierSelectHandler.options[3].modifierTypeOption.upgradeCount).toEqual(ModifierTier.ULTRA);
+      expect(modifierSelectHandler.options[4].modifierTypeOption.type.tier - modifierSelectHandler.options[4].modifierTypeOption.upgradeCount).toEqual(ModifierTier.GREAT);
+      expect(modifierSelectHandler.options[5].modifierTypeOption.type.tier - modifierSelectHandler.options[5].modifierTypeOption.upgradeCount).toEqual(ModifierTier.GREAT);
+    });
+  });
+
+  describe("Option 3 - Leave", () => {
+    it("should have the correct properties", () => {
+      const option = WeirdDreamEncounter.options[2];
+      expect(option.optionMode).toBe(MysteryEncounterOptionMode.DEFAULT);
+      expect(option.dialogue).toBeDefined();
+      expect(option.dialogue).toStrictEqual({
+        buttonLabel: `${namespace}:option.3.label`,
+        buttonTooltip: `${namespace}:option.3.tooltip`,
+        selected: [
+          {
+            text: `${namespace}:option.3.selected`,
+          },
+        ],
+      });
+    });
+
+    it("should reduce party levels by 10%", async () => {
       const leaveEncounterWithoutBattleSpy = vi.spyOn(EncounterPhaseUtils, "leaveEncounterWithoutBattle");
 
       await game.runToMysteryEncounter(MysteryEncounterType.WEIRD_DREAM, defaultParty);
       const levelsPrior = scene.getParty().map(p => p.level);
-      await runMysteryEncounterToEnd(game, 2);
+      await runMysteryEncounterToEnd(game, 3);
 
       const levelsAfter = scene.getParty().map(p => p.level);
 
       for (let i = 0; i < levelsPrior.length; i++) {
-        expect(Math.max(Math.ceil(0.8875 * levelsPrior[i]), 1)).toBe(levelsAfter[i]);
+        expect(Math.max(Math.ceil(0.9 * levelsPrior[i]), 1)).toBe(levelsAfter[i]);
         expect(scene.getParty()[i].levelExp).toBe(0);
       }
 
@@ -195,7 +244,7 @@ describe("Weird Dream - Mystery Encounter", () => {
       const leaveEncounterWithoutBattleSpy = vi.spyOn(EncounterPhaseUtils, "leaveEncounterWithoutBattle");
 
       await game.runToMysteryEncounter(MysteryEncounterType.WEIRD_DREAM, defaultParty);
-      await runMysteryEncounterToEnd(game, 2);
+      await runMysteryEncounterToEnd(game, 3);
 
       expect(leaveEncounterWithoutBattleSpy).toBeCalled();
     });