Implement Skill Swap and fix Wonder Guard with status moves

src/data/ability.ts

@@ -2,7 +2,7 @@ import Pokemon, { HitResult, PokemonMove } from "../field/pokemon";
 import { Type } from "./type";
 import * as Utils from "../utils";
 import { BattleStat, getBattleStatName } from "./battle-stat";
-import { DamagePhase, ObtainStatusEffectPhase, PokemonHealPhase, ShowAbilityPhase, StatChangePhase } from "../phases";
+import { ObtainStatusEffectPhase, PokemonHealPhase, ShowAbilityPhase, StatChangePhase } from "../phases";
 import { getPokemonMessage } from "../messages";
 import { Weather, WeatherType } from "./weather";
 import { BattlerTag } from "./battler-tags";
@@ -283,7 +283,7 @@ export class NonSuperEffectiveImmunityAbAttr extends TypeImmunityAbAttr {
   }
 
   applyPreDefend(pokemon: Pokemon, attacker: Pokemon, move: PokemonMove, cancelled: Utils.BooleanHolder, args: any[]): boolean {
-    if (pokemon.getAttackTypeEffectiveness(move.getMove().type) < 2) {
+    if (move.getMove() instanceof AttackMove && pokemon.getAttackTypeEffectiveness(move.getMove().type) < 2) {
       cancelled.value = true;
       (args[0] as Utils.NumberHolder).value = 0;
       return true;
@@ -1109,6 +1109,12 @@ export class SyncEncounterNatureAbAttr extends AbAttr {
   }
 }
 
+export class ProtectAbilityAbAttr extends AbAttr {
+  constructor() {
+    super(false);
+  }
+}
+
 function applyAbAttrsInternal<TAttr extends AbAttr>(attrType: { new(...args: any[]): TAttr },
   pokemon: Pokemon, applyFunc: AbAttrApplyFunc<TAttr>, isAsync: boolean = false, showAbilityInstant: boolean = false, quiet: boolean = false): Promise<void> {
   return new Promise(resolve => {
@@ -1612,7 +1618,8 @@ export function initAbilities() {
       .attr(ArenaTrapAbAttr),
     new Ability(Abilities.ROUGH_SKIN, "Rough Skin (N)", "This Pokémon inflicts damage with its rough skin to the attacker on contact.", 3),
     new Ability(Abilities.WONDER_GUARD, "Wonder Guard", "Its mysterious power only lets supereffective moves hit the Pokémon.", 3)
-      .attr(NonSuperEffectiveImmunityAbAttr),
+      .attr(NonSuperEffectiveImmunityAbAttr)
+      .attr(ProtectAbilityAbAttr),
     new Ability(Abilities.LEVITATE, "Levitate", "By floating in the air, the Pokémon receives full immunity to all Ground-type moves.", 3)
       .attr(TypeImmunityAbAttr, Type.GROUND, (pokemon: Pokemon) => !pokemon.getTag(BattlerTagType.IGNORE_FLYING) && !pokemon.scene.arena.getTag(ArenaTagType.GRAVITY)),
     new Ability(Abilities.EFFECT_SPORE, "Effect Spore", "Contact with the Pokémon may inflict poison, sleep, or paralysis on its attacker.", 3)
@@ -1783,7 +1790,8 @@ export function initAbilities() {
     new Ability(Abilities.FRISK, "Frisk (N)", "When it enters a battle, the Pokémon can check an opposing Pokémon's held item.", 4),
     new Ability(Abilities.RECKLESS, "Reckless", "Powers up moves that have recoil damage.", 4)
       .attr(MovePowerBoostAbAttr, (user, target, move) => move.getAttrs(RecoilAttr).length && move.id !== Moves.STRUGGLE, 1.2),
-    new Ability(Abilities.MULTITYPE, "Multitype (N)", "Changes the Pokémon's type to match the Plate or Z-Crystal it holds.", 4),
+    new Ability(Abilities.MULTITYPE, "Multitype (N)", "Changes the Pokémon's type to match the Plate or Z-Crystal it holds.", 4)
+      .attr(ProtectAbilityAbAttr),
     new Ability(Abilities.FLOWER_GIFT, "Flower Gift (N)", "Boosts the Attack and Sp. Def stats of itself and allies in harsh sunlight.", 4),
     new Ability(Abilities.BAD_DREAMS, "Bad Dreams (N)", "Reduces the HP of sleeping opposing Pokémon.", 4),
     new Ability(Abilities.PICKPOCKET, "Pickpocket", "Steals an item from an attacker that made direct contact.", 5)
@@ -1827,7 +1835,8 @@ export function initAbilities() {
       .condition(getWeatherCondition(WeatherType.SANDSTORM)),
     new Ability(Abilities.WONDER_SKIN, "Wonder Skin (N)", "Makes status moves more likely to miss.", 5),
     new Ability(Abilities.ANALYTIC, "Analytic (N)", "Boosts move power when the Pokémon moves last.", 5),
-    new Ability(Abilities.ILLUSION, "Illusion (N)", "Comes out disguised as the Pokémon in the party's last spot.", 5),
+    new Ability(Abilities.ILLUSION, "Illusion (N)", "Comes out disguised as the Pokémon in the party's last spot.", 5)
+      .attr(ProtectAbilityAbAttr),
     new Ability(Abilities.IMPOSTER, "Imposter", "The Pokémon transforms itself into the Pokémon it's facing.", 5)
       .attr(PostSummonTransformAbAttr),
     new Ability(Abilities.INFILTRATOR, "Infiltrator (N)", "Passes through the opposing Pokémon's barrier, substitute, and the like and strikes.", 5),
@@ -1865,7 +1874,8 @@ export function initAbilities() {
       .attr(MovePowerBoostAbAttr, (user, target, move) => move.hasFlag(MoveFlags.BITING_MOVE), 1.5),
     new Ability(Abilities.REFRIGERATE, "Refrigerate (N)", "Normal-type moves become Ice-type moves. The power of those moves is boosted a little.", 6),
     new Ability(Abilities.SWEET_VEIL, "Sweet Veil (N)", "Prevents itself and ally Pokémon from falling asleep.", 6),
-    new Ability(Abilities.STANCE_CHANGE, "Stance Change (N)", "The Pokémon changes its form to Blade Forme when it uses an attack move and changes to Shield Forme when it uses King's Shield.", 6),
+    new Ability(Abilities.STANCE_CHANGE, "Stance Change (N)", "The Pokémon changes its form to Blade Forme when it uses an attack move and changes to Shield Forme when it uses King's Shield.", 6)
+      .attr(ProtectAbilityAbAttr),
     new Ability(Abilities.GALE_WINGS, "Gale Wings (N)", "Gives priority to Flying-type moves when the Pokémon's HP is full.", 6),
     new Ability(Abilities.MEGA_LAUNCHER, "Mega Launcher", "Powers up aura and pulse moves.", 6)
       .attr(MovePowerBoostAbAttr, (user, target, move) => move.hasFlag(MoveFlags.PULSE_MOVE), 1.5),
@@ -1891,7 +1901,8 @@ export function initAbilities() {
     new Ability(Abilities.EMERGENCY_EXIT, "Emergency Exit (N)", "The Pokémon, sensing danger, switches out when its HP becomes half or less.", 7),
     new Ability(Abilities.WATER_COMPACTION, "Water Compaction (N)", "Boosts the Pokémon's Defense stat sharply when hit by a Water-type move.", 7),
     new Ability(Abilities.MERCILESS, "Merciless (N)", "The Pokémon's attacks become critical hits if the target is poisoned.", 7),
-    new Ability(Abilities.SHIELDS_DOWN, "Shields Down (N)", "When its HP becomes half or less, the Pokémon's shell breaks and it becomes aggressive.", 7),
+    new Ability(Abilities.SHIELDS_DOWN, "Shields Down (N)", "When its HP becomes half or less, the Pokémon's shell breaks and it becomes aggressive.", 7)
+      .attr(ProtectAbilityAbAttr),
     new Ability(Abilities.STAKEOUT, "Stakeout (N)", "Doubles the damage dealt to the target's replacement if the target switches out.", 7),
     new Ability(Abilities.WATER_BUBBLE, "Water Bubble", "Lowers the power of Fire-type moves done to the Pokémon and prevents the Pokémon from getting a burn.", 7)
       .attr(ReceivedTypeDamageMultiplierAbAttr, Type.FIRE, 0.5)
@@ -1909,12 +1920,17 @@ export function initAbilities() {
     new Ability(Abilities.TRIAGE, "Triage (N)", "Gives priority to a healing move.", 7),
     new Ability(Abilities.GALVANIZE, "Galvanize (N)", "Normal-type moves become Electric-type moves. The power of those moves is boosted a little.", 7),
     new Ability(Abilities.SURGE_SURFER, "Surge Surfer (N)", "Doubles the Pokémon's Speed stat on Electric Terrain.", 7),
-    new Ability(Abilities.SCHOOLING, "Schooling (N)", "When it has a lot of HP, the Pokémon forms a powerful school. It stops schooling when its HP is low.", 7),
+    new Ability(Abilities.SCHOOLING, "Schooling (N)", "When it has a lot of HP, the Pokémon forms a powerful school. It stops schooling when its HP is low.", 7)
-    new Ability(Abilities.DISGUISE, "Disguise (N)", "Once per battle, the shroud that covers the Pokémon can protect it from an attack.", 7),
+      .attr(ProtectAbilityAbAttr),
-    new Ability(Abilities.BATTLE_BOND, "Battle Bond (N)", "Defeating an opposing Pokémon strengthens the Pokémon's bond with its Trainer, and it becomes Ash-Greninja. Water Shuriken gets more powerful.", 7),
+    new Ability(Abilities.DISGUISE, "Disguise (N)", "Once per battle, the shroud that covers the Pokémon can protect it from an attack.", 7)
-    new Ability(Abilities.POWER_CONSTRUCT, "Power Construct (N)", "Other Cells gather to aid when its HP becomes half or less. Then the Pokémon changes its form to Complete Forme.", 7),
+      .attr(ProtectAbilityAbAttr),
+    new Ability(Abilities.BATTLE_BOND, "Battle Bond (N)", "Defeating an opposing Pokémon strengthens the Pokémon's bond with its Trainer, and it becomes Ash-Greninja. Water Shuriken gets more powerful.", 7)
+      .attr(ProtectAbilityAbAttr),
+    new Ability(Abilities.POWER_CONSTRUCT, "Power Construct (N)", "Other Cells gather to aid when its HP becomes half or less. Then the Pokémon changes its form to Complete Forme.", 7)
+      .attr(ProtectAbilityAbAttr),
     new Ability(Abilities.CORROSION, "Corrosion (N)", "The Pokémon can poison the target even if it's a Steel or Poison type.", 7),
-    new Ability(Abilities.COMATOSE, "Comatose (N)", "It's always drowsing and will never wake up. It can attack without waking up.", 7),
+    new Ability(Abilities.COMATOSE, "Comatose (N)", "It's always drowsing and will never wake up. It can attack without waking up.", 7)
+      .attr(ProtectAbilityAbAttr),
     new Ability(Abilities.QUEENLY_MAJESTY, "Queenly Majesty (N)", "Its majesty pressures the opposing Pokémon, making it unable to attack using priority moves.", 7),
     new Ability(Abilities.INNARDS_OUT, "Innards Out (N)", "Damages the attacker landing the finishing hit by the amount equal to its last HP.", 7),
     new Ability(Abilities.DANCER, "Dancer (N)", "When another Pokémon uses a dance move, it can use a dance move following it regardless of its Speed.", 7),
@@ -1928,7 +1944,8 @@ export function initAbilities() {
     new Ability(Abilities.RECEIVER, "Receiver (N)", "The Pokémon copies the Ability of a defeated ally.", 7),
     new Ability(Abilities.POWER_OF_ALCHEMY, "Power of Alchemy (N)", "The Pokémon copies the Ability of a defeated ally.", 7),
     new Ability(Abilities.BEAST_BOOST, "Beast Boost (N)", "The Pokémon boosts its most proficient stat each time it knocks out a Pokémon.", 7),
-    new Ability(Abilities.RKS_SYSTEM, "RKS System (N)", "Changes the Pokémon's type to match the memory disc it holds.", 7),
+    new Ability(Abilities.RKS_SYSTEM, "RKS System (N)", "Changes the Pokémon's type to match the memory disc it holds.", 7)
+      .attr(ProtectAbilityAbAttr),
     new Ability(Abilities.ELECTRIC_SURGE, "Electric Surge (N)", "Turns the ground into Electric Terrain when the Pokémon enters a battle.", 7),
     new Ability(Abilities.PSYCHIC_SURGE, "Psychic Surge (N)", "Turns the ground into Psychic Terrain when the Pokémon enters a battle.", 7),
     new Ability(Abilities.MISTY_SURGE, "Misty Surge (N)", "Turns the ground into Misty Terrain when the Pokémon enters a battle.", 7),
@@ -1946,7 +1963,8 @@ export function initAbilities() {
     new Ability(Abilities.COTTON_DOWN, "Cotton Down (N)", "When the Pokémon is hit by an attack, it scatters cotton fluff around and lowers the Speed stat of all Pokémon except itself.", 8),
     new Ability(Abilities.PROPELLER_TAIL, "Propeller Tail (N)", "Ignores the effects of opposing Pokémon's Abilities and moves that draw in moves.", 8),
     new Ability(Abilities.MIRROR_ARMOR, "Mirror Armor (N)", "Bounces back only the stat-lowering effects that the Pokémon receives.", 8),
-    new Ability(Abilities.GULP_MISSILE, "Gulp Missile (N)", "When the Pokémon uses Surf or Dive, it will come back with prey. When it takes damage, it will spit out the prey to attack.", 8),
+    new Ability(Abilities.GULP_MISSILE, "Gulp Missile (N)", "When the Pokémon uses Surf or Dive, it will come back with prey. When it takes damage, it will spit out the prey to attack.", 8)
+      .attr(ProtectAbilityAbAttr),
     new Ability(Abilities.STALWART, "Stalwart (N)", "Ignores the effects of opposing Pokémon's Abilities and moves that draw in moves.", 8),
     new Ability(Abilities.STEAM_ENGINE, "Steam Engine (N)", "Boosts the Pokémon's Speed stat drastically if hit by a Fire- or Water-type move.", 8),
     new Ability(Abilities.PUNK_ROCK, "Punk Rock", "Boosts the power of sound-based moves. The Pokémon also takes half the damage from these kinds of moves.", 8)
@@ -1956,7 +1974,8 @@ export function initAbilities() {
     new Ability(Abilities.ICE_SCALES, "Ice Scales (N)", "The Pokémon is protected by ice scales, which halve the damage taken from special moves.", 8),
     new Ability(Abilities.RIPEN, "Ripen", "Ripens Berries and doubles their effect.", 8)
       .attr(DoubleBerryEffectAbAttr),
-    new Ability(Abilities.ICE_FACE, "Ice Face (N)", "The Pokémon's ice head can take a physical attack as a substitute, but the attack also changes the Pokémon's appearance. The ice will be restored when it hails.", 8),
+    new Ability(Abilities.ICE_FACE, "Ice Face (N)", "The Pokémon's ice head can take a physical attack as a substitute, but the attack also changes the Pokémon's appearance. The ice will be restored when it hails.", 8)
+      .attr(ProtectAbilityAbAttr),
     new Ability(Abilities.POWER_SPOT, "Power Spot (N)", "Just being next to the Pokémon powers up moves.", 8),
     new Ability(Abilities.MIMICRY, "Mimicry (N)", "Changes the Pokémon's type depending on the terrain.", 8),
     new Ability(Abilities.SCREEN_CLEANER, "Screen Cleaner (N)", "When the Pokémon enters a battle, the effects of Light Screen, Reflect, and Aurora Veil are nullified for both opposing and ally Pokémon.", 8),
@@ -1964,7 +1983,8 @@ export function initAbilities() {
     new Ability(Abilities.PERISH_BODY, "Perish Body (N)", "When hit by a move that makes direct contact, the Pokémon and the attacker will faint after three turns unless they switch out of battle.", 8),
     new Ability(Abilities.WANDERING_SPIRIT, "Wandering Spirit (N)", "The Pokémon exchanges Abilities with a Pokémon that hits it with a move that makes direct contact.", 8),
     new Ability(Abilities.GORILLA_TACTICS, "Gorilla Tactics (N)", "Boosts the Pokémon's Attack stat but only allows the use of the first selected move.", 8),
-    new Ability(Abilities.NEUTRALIZING_GAS, "Neutralizing Gas (N)", "If the Pokémon with Neutralizing Gas is in the battle, the effects of all Pokémon's Abilities will be nullified or will not be triggered.", 8),
+    new Ability(Abilities.NEUTRALIZING_GAS, "Neutralizing Gas (N)", "If the Pokémon with Neutralizing Gas is in the battle, the effects of all Pokémon's Abilities will be nullified or will not be triggered.", 8)
+      .attr(ProtectAbilityAbAttr),
     new Ability(Abilities.PASTEL_VEIL, "Pastel Veil", "Protects the Pokémon and its ally Pokémon from being poisoned.", 8)
       .attr(StatusEffectImmunityAbAttr, StatusEffect.POISON),
     new Ability(Abilities.HUNGER_SWITCH, "Hunger Switch (N)", "The Pokémon changes its form, alternating between its Full Belly Mode and Hangry Mode after the end of each turn.", 8),
@@ -1994,11 +2014,15 @@ export function initAbilities() {
     new Ability(Abilities.ROCKY_PAYLOAD, "Rocky Payload", "Powers up Rock-type moves.", 9)
       .attr(MoveTypePowerBoostAbAttr, Type.ROCK),
     new Ability(Abilities.WIND_POWER, "Wind Power (N)", "The Pokémon becomes charged when it is hit by a wind move, boosting the power of the next Electric-type move the Pokémon uses.", 9),
-    new Ability(Abilities.ZERO_TO_HERO, "Zero to Hero (N)", "The Pokémon transforms into its Hero Form when it switches out.", 9),
+    new Ability(Abilities.ZERO_TO_HERO, "Zero to Hero (N)", "The Pokémon transforms into its Hero Form when it switches out.", 9)
-    new Ability(Abilities.COMMANDER, "Commander (N)", "When the Pokémon enters a battle, it goes inside the mouth of an ally Dondozo if one is on the field. The Pokémon then issues commands from there.", 9),
+      .attr(ProtectAbilityAbAttr),
+    new Ability(Abilities.COMMANDER, "Commander (N)", "When the Pokémon enters a battle, it goes inside the mouth of an ally Dondozo if one is on the field. The Pokémon then issues commands from there.", 9)
+      .attr(ProtectAbilityAbAttr),
     new Ability(Abilities.ELECTROMORPHOSIS, "Electromorphosis (N)", "The Pokémon becomes charged when it takes damage, boosting the power of the next Electric-type move the Pokémon uses.", 9),
-    new Ability(Abilities.PROTOSYNTHESIS, "Protosynthesis (N)", "Boosts the Pokémon's most proficient stat in harsh sunlight or if the Pokémon is holding Booster Energy.", 9),
+    new Ability(Abilities.PROTOSYNTHESIS, "Protosynthesis (N)", "Boosts the Pokémon's most proficient stat in harsh sunlight or if the Pokémon is holding Booster Energy.", 9)
-    new Ability(Abilities.QUARK_DRIVE, "Quark Drive (N)", "Boosts the Pokémon's most proficient stat on Electric Terrain or if the Pokémon is holding Booster Energy.", 9),
+      .attr(ProtectAbilityAbAttr),
+    new Ability(Abilities.QUARK_DRIVE, "Quark Drive (N)", "Boosts the Pokémon's most proficient stat on Electric Terrain or if the Pokémon is holding Booster Energy.", 9)
+      .attr(ProtectAbilityAbAttr),
     new Ability(Abilities.GOOD_AS_GOLD, "Good as Gold (N)", "A body of pure, solid gold gives the Pokémon full immunity to other Pokémon's status moves.", 9),
     new Ability(Abilities.VESSEL_OF_RUIN, "Vessel of Ruin (N)", "The power of the Pokémon's ruinous vessel lowers the Sp. Atk stats of all Pokémon except itself.", 9),
     new Ability(Abilities.SWORD_OF_RUIN, "Sword of Ruin (N)", "The power of the Pokémon's ruinous sword lowers the Defense stats of all Pokémon except itself.", 9),
@@ -2006,8 +2030,10 @@ export function initAbilities() {
     new Ability(Abilities.BEADS_OF_RUIN, "Beads of Ruin (N)", "The power of the Pokémon's ruinous beads lowers the Sp. Def stats of all Pokémon except itself.", 9),
     new Ability(Abilities.ORICHALCUM_PULSE, "Orichalcum Pulse", "Turns the sunlight harsh when the Pokémon enters a battle. The ancient pulse thrumming through the Pokémon also boosts its Attack stat in harsh sunlight.", 9)
       .attr(PostSummonWeatherChangeAbAttr, WeatherType.SUNNY)
-      .conditionalAttr(getWeatherCondition(WeatherType.SUNNY, WeatherType.HARSH_SUN), BattleStatMultiplierAbAttr, BattleStat.ATK, 1),
+      .conditionalAttr(getWeatherCondition(WeatherType.SUNNY, WeatherType.HARSH_SUN), BattleStatMultiplierAbAttr, BattleStat.ATK, 1)
-    new Ability(Abilities.HADRON_ENGINE, "Hadron Engine (N)", "Turns the ground into Electric Terrain when the Pokémon enters a battle. The futuristic engine within the Pokémon also boosts its Sp. Atk stat on Electric Terrain.", 9),
+      .attr(ProtectAbilityAbAttr),
+    new Ability(Abilities.HADRON_ENGINE, "Hadron Engine (N)", "Turns the ground into Electric Terrain when the Pokémon enters a battle. The futuristic engine within the Pokémon also boosts its Sp. Atk stat on Electric Terrain.", 9)
+      .attr(ProtectAbilityAbAttr),
     new Ability(Abilities.OPPORTUNIST, "Opportunist (N)", "If an opponent's stat is boosted, the Pokémon seizes the opportunity to boost the same stat for itself.", 9),
     new Ability(Abilities.CUD_CHEW, "Cud Chew (N)", "When the Pokémon eats a Berry, it will regurgitate that Berry at the end of the next turn and eat it one more time.", 9),
     new Ability(Abilities.SHARPNESS, "Sharpness", "Powers up slicing moves.", 9)
@@ -2028,5 +2054,6 @@ export function initAbilities() {
     new Ability(Abilities.TERA_SHELL, "Tera Shell (N)", "The Pokémon's shell contains the powers of each type. All damage-dealing moves that hit the Pokémon when its HP is full will not be very effective.", 9),
     new Ability(Abilities.TERAFORM_ZERO, "Teraform Zero (N)", "When Terapagos changes into its Stellar Form, it uses its hidden powers to eliminate all effects of weather and terrain, reducing them to zero.", 9),
     new Ability(Abilities.POISON_PUPPETEER, "Poison Puppeteer (N)", "Pokémon poisoned by Pecharunt's moves will also become confused.", 9)
+      .attr(ProtectAbilityAbAttr)
   );
 }

src/data/move.ts

@@ -12,7 +12,7 @@ import * as Utils from "../utils";
 import { WeatherType } from "./weather";
 import { ArenaTagSide, ArenaTrapTag } from "./arena-tag";
 import { ArenaTagType } from "./enums/arena-tag-type";
-import { Abilities, BlockRecoilDamageAttr, IgnoreContactAbAttr, MaxMultiHitAbAttr, applyAbAttrs } from "./ability";
+import { Abilities, ProtectAbilityAbAttr, BlockRecoilDamageAttr, IgnoreContactAbAttr, MaxMultiHitAbAttr, applyAbAttrs } from "./ability";
 import { PokemonHeldItemModifier } from "../modifier/modifier";
 import { BattlerIndex } from "../battle";
 import { Stat } from "./pokemon-stat";
@@ -2096,6 +2096,25 @@ export class SketchAttr extends MoveEffectAttr {
   }
 }
 
+export class SwitchAbilitiesAttr extends MoveEffectAttr {
+  apply(user: Pokemon, target: Pokemon, move: Move, args: any[]): boolean {
+    if (!super.apply(user, target, move, args))
+      return false;
+
+    const tempAbilityId = user.getAbility().id;
+    user.summonData.ability = target.getAbility().id;
+    target.summonData.ability = tempAbilityId;
+
+    user.scene.queueMessage(getPokemonMessage(user, ` swapped\nAbilities with its target!`));
+
+    return true;
+  }
+
+  getCondition(): MoveConditionFunc {
+    return (user, target, move) => !target.getAbility().hasAttr(ProtectAbilityAbAttr);
+  }
+}
+
 export class TransformAttr extends MoveEffectAttr {
   apply(user: Pokemon, target: Pokemon, move: Move, args: any[]): Promise<boolean> {
     return new Promise(resolve => {
@@ -2941,7 +2960,8 @@ export function initMoves() {
     new AttackMove(Moves.ERUPTION, "Eruption", Type.FIRE, MoveCategory.SPECIAL, 150, 100, 5, -1, "The user attacks opposing Pokémon with explosive fury. The lower the user's HP, the lower the move's power.", -1, 0, 3)
       .attr(HpPowerAttr)
       .target(MoveTarget.ALL_NEAR_ENEMIES),
-    new StatusMove(Moves.SKILL_SWAP, "Skill Swap (N)", Type.PSYCHIC, -1, 10, 98, "The user employs its psychic power to exchange Abilities with the target.", -1, 0, 3),
+    new StatusMove(Moves.SKILL_SWAP, "Skill Swap", Type.PSYCHIC, -1, 10, 98, "The user employs its psychic power to exchange Abilities with the target.", -1, 0, 3)
+      .attr(SwitchAbilitiesAttr),
     new SelfStatusMove(Moves.IMPRISON, "Imprison (N)", Type.PSYCHIC, -1, 10, 92, "If opposing Pokémon know any move also known by the user, they are prevented from using it.", -1, 0, 3),
     new SelfStatusMove(Moves.REFRESH, "Refresh", Type.NORMAL, -1, 20, -1, "The user rests to cure itself of poisoning, a burn, or paralysis.", -1, 0, 3)
       .attr(HealStatusEffectAttr, true, StatusEffect.PARALYSIS, StatusEffect.POISON, StatusEffect.TOXIC, StatusEffect.BURN)

src/egg-hatch-phase.ts

@@ -149,7 +149,7 @@ export class EggHatchPhase extends Phase {
         pokemonGenderText.setVisible(true);
       }
 
-      pokemonAbilityText.setText(pokemon.getAbility().name);
+      pokemonAbilityText.setText(pokemon.getAbility(true).name);
       pokemonNatureText.setText(getNatureName(pokemon.nature, true));
 
       const originalIvs: integer[] = this.scene.gameData.dexData[pokemon.species.speciesId].caughtAttr

src/field/pokemon.ts

@@ -13,8 +13,8 @@ import { PokeballType } from '../data/pokeball';
 import { Gender } from '../data/gender';
 import { initMoveAnim, loadMoveAnimAssets } from '../data/battle-anims';
 import { Status, StatusEffect } from '../data/status-effect';
-import { reverseCompatibleTms, tmSpecies } from '../data/tms';
 import { pokemonEvolutions, pokemonPrevolutions, SpeciesFormEvolution, SpeciesEvolutionCondition } from '../data/pokemon-evolutions';
+import { reverseCompatibleTms, tmSpecies } from '../data/tms';
 import { DamagePhase, FaintPhase, LearnMovePhase, StatChangePhase, SwitchSummonPhase } from '../phases';
 import { BattleStat } from '../data/battle-stat';
 import { BattlerTag, BattlerTagLapseType, EncoreTag, TypeBoostTag, getBattlerTag } from '../data/battler-tags';
@@ -668,7 +668,9 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     return this.getTypes(true).indexOf(type) > -1;
   }
 
-  getAbility(): Ability {
+  getAbility(ignoreOverride?: boolean): Ability {
+    if (!ignoreOverride && this.summonData?.ability)
+      return allAbilities[this.summonData.ability];
     if (ABILITY_OVERRIDE && this.isPlayer())
       return allAbilities[ABILITY_OVERRIDE];
     if (OPP_ABILITY_OVERRIDE && !this.isPlayer())
@@ -2513,6 +2515,7 @@ export class PokemonSummonData {
 
   public speciesForm: PokemonSpeciesForm;
   public fusionSpeciesForm: PokemonSpeciesForm;
+  public ability: Abilities = Abilities.NONE;
   public gender: Gender;
   public fusionGender: Gender;
   public stats: integer[];

src/ui/summary-ui-handler.ts

@@ -510,7 +510,7 @@ export default class SummaryUiHandler extends UiHandler {
         if (this.pokemon.isTerastallized())
           profileContainer.add(getTypeIcon(types.length, this.pokemon.getTeraType(), true));
 
-        const ability = this.pokemon.getAbility();
+        const ability = this.pokemon.getAbility(true);
 
         const abilityNameText = addTextObject(this.scene, 7, 66, ability.name, TextStyle.SUMMARY);
         abilityNameText.setOrigin(0, 1);