diff --git a/package-lock.json b/package-lock.json
index 0605b299dab..35089ea0f62 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6148,4 +6148,4 @@
 			}
 		}
 	}
-}
+}
\ No newline at end of file
diff --git a/public/images/items.json b/public/images/items.json
index 86792e23cc0..f6d14d18dbb 100644
--- a/public/images/items.json
+++ b/public/images/items.json
@@ -8396,4 +8396,4 @@
 		"version": "3.0",
 		"smartupdate": "$TexturePacker:SmartUpdate:b317e2cd3502364fcdae296cd439ac4d:ae80196191516a8cb098a8467c6faa2f:110e074689c9edd2c54833ce2e4d9270$"
 	}
-}
+}
\ No newline at end of file
diff --git a/src/battle-scene.ts b/src/battle-scene.ts
index 93b05a39ecb..b0967dfebda 100644
--- a/src/battle-scene.ts
+++ b/src/battle-scene.ts
@@ -851,7 +851,7 @@ export default class BattleScene extends SceneBase {
 
     container.add(icon);
 
-    if (pokemon.isFusion()) {
+    if (pokemon.isFusion(true)) {
       const fusionIcon = this.add.sprite(0, 0, pokemon.getFusionIconAtlasKey(ignoreOverride));
       fusionIcon.setName("sprite-fusion-icon");
       fusionIcon.setOrigin(0.5, 0);
diff --git a/src/data/ability.ts b/src/data/ability.ts
old mode 100644
new mode 100755
index 491a14ba621..f3e8270f17b
--- a/src/data/ability.ts
+++ b/src/data/ability.ts
@@ -1885,7 +1885,6 @@ export class PostSummonRemoveArenaTagAbAttr extends PostSummonAbAttr {
     return true;
   }
 }
-
 export class PostSummonMessageAbAttr extends PostSummonAbAttr {
   private messageFunc: (pokemon: Pokemon) => string;
 
@@ -1898,6 +1897,11 @@ export class PostSummonMessageAbAttr extends PostSummonAbAttr {
   applyPostSummon(pokemon: Pokemon, passive: boolean, args: any[]): boolean {
     pokemon.scene.queueMessage(this.messageFunc(pokemon));
 
+    pokemon.scene.getField(true).map(pokemon => {
+      if (pokemon.breakIllusion()) {
+        pokemon.scene.queueMessage(i18next.t("abilityTriggers:illusionBreak", { pokemonName: getPokemonNameWithAffix(pokemon) }));
+      }
+    });
     return true;
   }
 }
@@ -2262,6 +2266,10 @@ export class PostSummonTransformAbAttr extends PostSummonAbAttr {
       target = targets[0];
     }
 
+    if (target.illusion.active) {
+      return false;
+    }
+
     pokemon.summonData.speciesForm = target.getSpeciesForm();
     pokemon.summonData.fusionSpeciesForm = target.getFusionSpeciesForm();
     pokemon.summonData.ability = target.getAbility().id;
@@ -3554,8 +3562,8 @@ export class MaxMultiHitAbAttr extends AbAttr {
 }
 
 export class PostBattleAbAttr extends AbAttr {
-  constructor() {
-    super(true);
+  constructor(showAbility: boolean = true) {
+    super(showAbility);
   }
 
   applyPostBattle(pokemon: Pokemon, passive: boolean, args: any[]): boolean {
@@ -4041,6 +4049,97 @@ export class IceFaceBlockPhysicalAbAttr extends ReceivedMoveDamageMultiplierAbAt
   }
 }
 
+export class PreSummonAbAttr extends AbAttr {
+  applyPreSummon(pokemon: Pokemon, passive: boolean, args: any[]): boolean {
+    return false;
+  }
+}
+
+export class IllusionPreSummonAbAttr extends PreSummonAbAttr {
+  /**
+   * Apply a new illusion when summoning Zoroark if the illusion is available
+   *
+   * @param {Pokemon} pokemon - The Pokémon with the Illusion ability.
+   * @param {boolean} passive - N/A
+   * @param {...any} args - N/A
+   * @returns {boolean} - Whether the illusion was applied.
+   */
+  applyPreSummon(pokemon: Pokemon, passive: boolean, args: any[]): boolean {
+    let suppressed = false;
+    pokemon.scene.getField(true).filter(p => p !== pokemon).map(p => {
+      if (p.getAbility().hasAttr(SuppressFieldAbilitiesAbAttr) && p.canApplyAbility()) {
+        suppressed = true;
+      }
+      if (p.getPassiveAbility().hasAttr(SuppressFieldAbilitiesAbAttr) && p.canApplyAbility(true)) {
+        suppressed = true;
+      }
+    });
+
+    if (pokemon.illusion.available && !suppressed) {
+      return pokemon.generateIllusion();
+    } else {
+      return false;
+    }
+  }
+}
+
+export class IllusionBreakAbAttr extends PostDefendAbAttr {
+  /**
+   * Destroy illusion if attack move deals damage to zoroark
+   *
+   * @param {Pokemon} pokemon - The Pokémon with the Illusion ability.
+   * @param {boolean} passive - N/A
+   * @param {Pokemon} attacker - The attacking Pokémon.
+   * @param {PokemonMove} move - The move being used.
+   * @param {PokemonMove} hitResult - The type of hitResult the pokemon got
+   * @param {...any} args - N/A
+   * @returns {boolean} - Whether the illusion was destroyed.
+   */
+  applyPostDefend(pokemon: Pokemon, passive: boolean, attacker: Pokemon, move: Move, hitResult: HitResult, args: any[]): boolean {
+
+    const breakIllusion: HitResult[] = [HitResult.EFFECTIVE, HitResult.SUPER_EFFECTIVE, HitResult.NOT_VERY_EFFECTIVE, HitResult.ONE_HIT_KO];
+    if (!breakIllusion.includes(hitResult)) {
+      return false;
+    }
+    pokemon.breakIllusion();
+    pokemon.scene.queueMessage(i18next.t("abilityTriggers:illusionBreak", { pokemonName: getPokemonNameWithAffix(pokemon) }));
+    return true;
+  }
+}
+
+export class IllusionAfterBattle extends PostBattleAbAttr {
+  /**
+   * Illusion will be available again after a battle and apply the illusion of the pokemon is already on field
+   *
+   * @param {Pokemon} pokemon - The Pokémon with the Illusion ability.
+   * @param {boolean} passive - N/A
+   * @param {...any} args - N/A
+   * @returns {boolean} - Whether the illusion was applied.
+   */
+  applyPostBattle(pokemon: Pokemon, passive: boolean, args: any[]): boolean {
+    pokemon.breakIllusion();
+    pokemon.illusion.available = true;
+    return true;
+  }
+}
+
+export class IllusionDisableAbAttr extends PostSummonAbAttr {
+  /**
+   * Illusion will be disabled if the pokemon is summoned with an illusion.
+   * So the pokemon can use 1 illusion per battle.
+   *
+   * @param {Pokemon} pokemon - The Pokémon with the Illusion ability.
+   * @param {boolean} passive - N/A
+   * @param {...any} args - N/A
+   * @returns {boolean}
+   */
+  applyPostSummon(pokemon: Pokemon, passive: boolean, args: any[]): boolean {
+    pokemon.illusion.available = false;
+    return true;
+  }
+}
+
+
 /**
  * If a Pokémon with this Ability selects a damaging move, it has a 30% chance of going first in its priority bracket. If the Ability activates, this is announced at the start of the turn (after move selection).
  *
@@ -4216,6 +4315,11 @@ export function applyPostSummonAbAttrs(attrType: Constructor<PostSummonAbAttr>,
   return applyAbAttrsInternal<PostSummonAbAttr>(attrType, pokemon, (attr, passive) => attr.applyPostSummon(pokemon, passive, args), args);
 }
 
+export function applyPreSummonAbAttrs(attrType: Constructor<PreSummonAbAttr>,
+  pokemon: Pokemon, ...args: any[]) {
+  return applyAbAttrsInternal<PreSummonAbAttr>(attrType, pokemon, (attr, passive) => attr.applyPreSummon(pokemon, passive, args), args);
+}
+
 export function applyPreSwitchOutAbAttrs(attrType: Constructor<PreSwitchOutAbAttr>,
   pokemon: Pokemon, ...args: any[]): Promise<void> {
   return applyAbAttrsInternal<PreSwitchOutAbAttr>(attrType, pokemon, (attr, passive) => attr.applyPreSwitchOut(pokemon, passive, args), args, true);
@@ -4759,7 +4863,15 @@ export function initAbilities() {
     new Ability(Abilities.ILLUSION, 5)
       .attr(UncopiableAbilityAbAttr)
       .attr(UnswappableAbilityAbAttr)
-      .unimplemented(),
+      //The pokemon generate an illusion if it's available
+      .conditionalAttr((pokemon) => pokemon.illusion.available, IllusionPreSummonAbAttr, false)
+      //The pokemon loses his illusion when he is damaged by a move
+      .conditionalAttr((pokemon) => pokemon.illusion.active, IllusionBreakAbAttr, true)
+      //Illusion is available again after a battle
+      .conditionalAttr((pokemon) => pokemon.isAllowedInBattle(), IllusionAfterBattle, false)
+      //Illusion is not available after summon
+      .attr(IllusionDisableAbAttr, false)
+      .bypassFaint(),
     new Ability(Abilities.IMPOSTER, 5)
       .attr(PostSummonTransformAbAttr)
       .attr(UncopiableAbilityAbAttr),
diff --git a/src/data/move.ts b/src/data/move.ts
index f90aef585d6..d68267dff37 100644
--- a/src/data/move.ts
+++ b/src/data/move.ts
@@ -5486,10 +5486,12 @@ export class AbilityChangeAttr extends MoveEffectAttr {
       return false;
     }
 
-    (this.selfTarget ? user : target).summonData.ability = this.ability;
-
-    user.scene.queueMessage(i18next.t("moveTriggers:acquiredAbility", {pokemonName: getPokemonNameWithAffix((this.selfTarget ? user : target)), abilityName: allAbilities[this.ability].name}));
-
+    const pokemon: Pokemon = this.selfTarget ? user : target;
+    pokemon.summonData.ability = this.ability;
+    if (pokemon.breakIllusion()) {
+      pokemon.scene.queueMessage(i18next.t("abilityTriggers:illusionBreak", { pokemonName: getPokemonNameWithAffix(pokemon) }));
+    }
+    user.scene.queueMessage(i18next.t("moveTriggers:acquiredAbility", {pokemonName: getPokemonNameWithAffix(pokemon), abilityName: allAbilities[this.ability].name}));
     return true;
   }
 
@@ -5641,7 +5643,8 @@ export class SuppressAbilitiesIfActedAttr extends MoveEffectAttr {
 export class TransformAttr extends MoveEffectAttr {
   apply(user: Pokemon, target: Pokemon, move: Move, args: any[]): Promise<boolean> {
     return new Promise(resolve => {
-      if (!super.apply(user, target, move, args)) {
+      if (!super.apply(user, target, move, args) || target.illusion.active || user.illusion.active) {
+        user.scene.queueMessage(i18next.t("battle:attackFailed"));
         return resolve(false);
       }
 
diff --git a/src/field/pokemon.ts b/src/field/pokemon.ts
index 71e89d60cbd..9224bd98cbb 100644
--- a/src/field/pokemon.ts
+++ b/src/field/pokemon.ts
@@ -63,6 +63,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   public name: string;
   public nickname: string;
   public species: PokemonSpecies;
+  public illusion: Illusion;
   public formIndex: integer;
   public abilityIndex: integer;
   public passive: boolean;
@@ -126,6 +127,8 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     const randAbilityIndex = Utils.randSeedInt(2);
 
     this.species = species;
+    this.illusion = {active: false, available: true};
+
     this.pokeball = dataSource?.pokeball || PokeballType.POKEBALL;
     this.level = level;
     // Determine the ability index
@@ -240,15 +243,17 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   }
 
 
-  getNameToRender() {
+  getNameToRender(useIllusion: boolean = true) {
+    const name: string = (!useIllusion && this.illusion.active) ? this.illusion.name : this.name;
+    const nickname: string = (!useIllusion && this.illusion.active) ? this.illusion.nickname : this.nickname;
     try {
-      if (this.nickname) {
-        return decodeURIComponent(escape(atob(this.nickname)));
+      if (nickname) {
+        return decodeURIComponent(escape(atob(nickname)));
       }
-      return this.name;
+      return name;
     } catch (err) {
-      console.error(`Failed to decode nickname for ${this.name}`, err);
-      return this.name;
+      console.error(`Failed to decode nickname for ${name}`, err);
+      return name;
     }
   }
 
@@ -276,7 +281,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     this.addAt(sprite, 0);
     this.addAt(tintSprite, 1);
 
-    if (this.isShiny() && !this.shinySparkle) {
+    if (this.isShiny(true) && !this.shinySparkle) {
       this.initShinySparkle();
     }
   }
@@ -337,6 +342,113 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     }
   }
 
+  /**
+   * Generate an illusion of the last pokemon in the party, as other wild pokemon in the area.
+   *
+   * @param {Pokemon} pokemon - The Pokemon that will create an illusion.
+   * @param {Pokemon[]} party - The party of the trainer's pokemon.
+   */
+  generateIllusion(): boolean {
+    if (this.hasTrainer()) {
+      const party: Pokemon[] = (this.isPlayer() ? this.scene.getParty() : this.scene.getEnemyParty()).filter(p => p.isAllowedInBattle());
+      const lastPokemon: Pokemon = party.at(-1);
+      const speciesId = lastPokemon.species.speciesId;
+
+      if ( lastPokemon === this || this.illusion.active ||
+        ((speciesId === Species.OGERPON || speciesId === Species.TERAPAGOS) && (lastPokemon.isTerastallized() || this.isTerastallized()))) {
+        return false;
+      }
+
+      this.illusion = {
+        active: true,
+        available: true,
+        name: this.name,
+        nickname: this.nickname,
+        species: getPokemonSpecies(speciesId),
+        formIndex: lastPokemon.formIndex,
+        shiny: this.shiny,
+        variant: this.variant,
+        shinySparkle: this.shinySparkle,
+        gender: lastPokemon.gender,
+        pokeball: lastPokemon.pokeball,
+        fusionFormIndex: lastPokemon.fusionFormIndex,
+        fusionSpecies: lastPokemon.fusionSpecies,
+        fusionVariant: this.fusionVariant,
+        fusionShiny: this.fusionShiny,
+        fusionGender: lastPokemon.fusionGender
+      };
+
+      this.name = lastPokemon.name;
+      this.nickname = lastPokemon.nickname;
+      this.shiny = lastPokemon.shiny;
+      this.variant = lastPokemon.variant;
+      this.fusionVariant = lastPokemon.fusionVariant;
+      this.fusionShiny = lastPokemon.fusionShiny;
+      if (this.shiny) {
+        this.initShinySparkle();
+      }
+      this.loadAssets(false, true).then(() => this.playAnim());
+    } else {
+      let availables: Species[] = [];
+      if (this.isBoss()) {
+        availables = [Species.ENTEI, Species.RAIKOU, Species.SUICUNE];
+      } else {
+        const area: Species[] = [
+          Species.HOUNDOUR, Species.SABLEYE, Species.PURRLOIN, Species.PAWNIARD, Species.NICKIT,
+          Species.IMPIDIMP, Species.MASCHIFF, Species.ABSOL, Species.SPIRITOMB, Species.DEINO,
+        ];
+
+        for (let species of area) {
+          for (const evolutionLevel of getPokemonSpecies(species).getEvolutionLevels()) {
+            if (evolutionLevel[1] && evolutionLevel[1] <= this.level) {
+              species = evolutionLevel[0];
+            }
+          }
+          availables.push(species);
+        }
+        availables.push(this.species.name === getPokemonSpecies(Species.ZORUA).name ? Species.MURKROW : Species.HONCHKROW);
+      }
+      const randomIllusion: PokemonSpecies = getPokemonSpecies(availables[this.randSeedInt(availables.length)]);
+
+      this.illusion = {
+        active: true,
+        available: true,
+        species: randomIllusion,
+        name: this.name,
+        shiny: this.shiny,
+        variant: this.variant,
+        shinySparkle: this.shinySparkle,
+        gender: this.gender
+      };
+      this.name = randomIllusion.name;
+      this.loadAssets(false, true).then(() => this.playAnim());
+    }
+    return true;
+  }
+
+  breakIllusion(): boolean {
+    if (!this.illusion.active) {
+      return false;
+    }
+
+    this.name = this.illusion.name;
+    this.nickname = this.illusion.nickname;
+    this.shiny = this.illusion.shiny;
+    this.variant = this.illusion.variant;
+    this.fusionVariant = this.illusion.fusionVariant;
+    this.fusionShiny = this.illusion.fusionShiny;
+    this.illusion = {active: false, available: false};
+    if (this.isOnField) {
+      this.scene.playSound("PRSFX- Transform");
+    }
+    if (this.shiny) {
+      this.initShinySparkle();
+    }
+    this.loadAssets(false).then(() => this.playAnim());
+    this.updateInfo(true);
+    return true;
+  }
+
   abstract isPlayer(): boolean;
 
   abstract hasTrainer(): boolean;
@@ -345,18 +457,25 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
 
   abstract getBattlerIndex(): BattlerIndex;
 
-  loadAssets(ignoreOverride: boolean = true): Promise<void> {
+  /**
+   * @param {boolean} useIllusion - Whether we want the illusion or not.
+   */
+  loadAssets(ignoreOverride: boolean = true, useIllusion: boolean = false): Promise<void> {
     return new Promise(resolve => {
       const moveIds = this.getMoveset().map(m => m.getMove().id);
       Promise.allSettled(moveIds.map(m => initMoveAnim(this.scene, m)))
         .then(() => {
           loadMoveAnimAssets(this.scene, moveIds);
-          this.getSpeciesForm().loadAssets(this.scene, this.getGender() === Gender.FEMALE, this.formIndex, this.shiny, this.variant);
-          if (this.isPlayer() || this.getFusionSpeciesForm()) {
+          const formIndex = this.illusion.active && useIllusion ? this.illusion.formIndex : this.formIndex;
+          this.getSpeciesForm(false, useIllusion).loadAssets(this.scene, this.getGender(useIllusion) === Gender.FEMALE, formIndex, this.isShiny(useIllusion), this.getVariant(useIllusion));
+          if (this.isPlayer() || this.getFusionSpeciesForm(false, useIllusion)) {
             this.scene.loadPokemonAtlas(this.getBattleSpriteKey(true, ignoreOverride), this.getBattleSpriteAtlasPath(true, ignoreOverride));
           }
-          if (this.getFusionSpeciesForm()) {
-            this.getFusionSpeciesForm().loadAssets(this.scene, this.getFusionGender() === Gender.FEMALE, this.fusionFormIndex, this.fusionShiny, this.fusionVariant);
+          if (this.getFusionSpeciesForm(false, useIllusion)) {
+            const fusionFormIndex = this.illusion.active && useIllusion ? this.illusion.fusionFormIndex : this.fusionFormIndex;
+            const fusionShiny = this.illusion.active && !useIllusion ? this.illusion.fusionShiny : this.fusionShiny;
+            const fusionVariant = this.illusion.active && !useIllusion ? this.illusion.fusionVariant : this.fusionVariant;
+            this.getFusionSpeciesForm(false, useIllusion).loadAssets(this.scene, this.getFusionGender(false, useIllusion) === Gender.FEMALE, fusionFormIndex, fusionShiny, fusionVariant);
             this.scene.loadPokemonAtlas(this.getFusionBattleSpriteKey(true, ignoreOverride), this.getFusionBattleSpriteAtlasPath(true, ignoreOverride));
           }
           this.scene.load.once(Phaser.Loader.Events.COMPLETE, () => {
@@ -456,18 +575,27 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   }
 
   getSpriteId(ignoreOverride?: boolean): string {
-    return this.getSpeciesForm(ignoreOverride).getSpriteId(this.getGender(ignoreOverride) === Gender.FEMALE, this.formIndex, this.shiny, this.variant);
+    const formIndex: integer = this.illusion.active ?  this.illusion.formIndex : this.formIndex;
+    return this.getSpeciesForm(ignoreOverride, true).getSpriteId(this.getGender(ignoreOverride, true) === Gender.FEMALE, formIndex, this.shiny, this.variant);
   }
 
   getBattleSpriteId(back?: boolean, ignoreOverride?: boolean): string {
     if (back === undefined) {
       back = this.isPlayer();
     }
-    return this.getSpeciesForm(ignoreOverride).getSpriteId(this.getGender(ignoreOverride) === Gender.FEMALE, this.formIndex, this.shiny, this.variant, back);
+
+    const formIndex: integer = this.illusion.active ?  this.illusion.formIndex : this.formIndex;
+
+    return this.getSpeciesForm(ignoreOverride, true).getSpriteId(this.getGender(ignoreOverride, true) === Gender.FEMALE, formIndex, this.shiny, this.variant, back);
   }
 
   getSpriteKey(ignoreOverride?: boolean): string {
-    return this.getSpeciesForm(ignoreOverride).getSpriteKey(this.getGender(ignoreOverride) === Gender.FEMALE, this.formIndex, this.shiny, this.variant);
+    return this.getSpeciesForm(ignoreOverride, false).getSpriteKey(
+      this.getGender(ignoreOverride) === Gender.FEMALE,
+      this.formIndex,
+      this.illusion.shiny ?? this.shiny,
+      this.illusion.variant ?? this.variant
+    );
   }
 
   getBattleSpriteKey(back?: boolean, ignoreOverride?: boolean): string {
@@ -475,14 +603,18 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   }
 
   getFusionSpriteId(ignoreOverride?: boolean): string {
-    return this.getFusionSpeciesForm(ignoreOverride).getSpriteId(this.getFusionGender(ignoreOverride) === Gender.FEMALE, this.fusionFormIndex, this.fusionShiny, this.fusionVariant);
+    const fusionFormIndex: integer = this.illusion.active ?  this.illusion.fusionFormIndex : this.fusionFormIndex;
+    return this.getFusionSpeciesForm(ignoreOverride, true).getSpriteId(this.getFusionGender(ignoreOverride, true) === Gender.FEMALE, fusionFormIndex, this.fusionShiny, this.fusionVariant);
   }
 
   getFusionBattleSpriteId(back?: boolean, ignoreOverride?: boolean): string {
     if (back === undefined) {
       back = this.isPlayer();
     }
-    return this.getFusionSpeciesForm(ignoreOverride).getSpriteId(this.getFusionGender(ignoreOverride) === Gender.FEMALE, this.fusionFormIndex, this.fusionShiny, this.fusionVariant, back);
+
+    const fusionFormIndex: integer = this.illusion.active ?  this.illusion.fusionFormIndex : this.fusionFormIndex;
+
+    return this.getFusionSpeciesForm(ignoreOverride, true).getSpriteId(this.getFusionGender(ignoreOverride, true) === Gender.FEMALE, fusionFormIndex, this.fusionShiny, this.fusionVariant, back);
   }
 
   getFusionBattleSpriteKey(back?: boolean, ignoreOverride?: boolean): string {
@@ -494,39 +626,56 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   }
 
   getIconAtlasKey(ignoreOverride?: boolean): string {
-    return this.getSpeciesForm(ignoreOverride).getIconAtlasKey(this.formIndex, this.shiny, this.variant);
+    const formIndex: integer = this.illusion.active ?  this.illusion.formIndex : this.formIndex;
+    return this.getSpeciesForm(ignoreOverride, true).getIconAtlasKey(formIndex, this.shiny, this.variant);
   }
 
   getFusionIconAtlasKey(ignoreOverride?: boolean): string {
-    return this.getFusionSpeciesForm(ignoreOverride).getIconAtlasKey(this.fusionFormIndex, this.fusionShiny, this.fusionVariant);
+    return this.getFusionSpeciesForm(ignoreOverride, true).getIconAtlasKey(this.fusionFormIndex, this.fusionShiny, this.fusionVariant);
   }
 
   getIconId(ignoreOverride?: boolean): string {
-    return this.getSpeciesForm(ignoreOverride).getIconId(this.getGender(ignoreOverride) === Gender.FEMALE, this.formIndex, this.shiny, this.variant);
+    const formIndex: integer = this.illusion.active ?  this.illusion.formIndex : this.formIndex;
+    return this.getSpeciesForm(ignoreOverride, true).getIconId(this.getGender(ignoreOverride, true) === Gender.FEMALE, formIndex, this.shiny, this.variant);
   }
 
   getFusionIconId(ignoreOverride?: boolean): string {
-    return this.getFusionSpeciesForm(ignoreOverride).getIconId(this.getFusionGender(ignoreOverride) === Gender.FEMALE, this.fusionFormIndex, this.fusionShiny, this.fusionVariant);
+    const fusionFormIndex: integer = this.illusion.active ?  this.illusion.fusionFormIndex : this.fusionFormIndex;
+    return this.getFusionSpeciesForm(ignoreOverride, true).getIconId(this.getFusionGender(ignoreOverride, true) === Gender.FEMALE, fusionFormIndex, this.fusionShiny, this.fusionVariant);
   }
 
-  getSpeciesForm(ignoreOverride?: boolean): PokemonSpeciesForm {
+  /**
+   * @param {boolean} useIllusion - Whether we want the speciesForm of the illusion or not.
+   */
+  getSpeciesForm(ignoreOverride?: boolean, useIllusion: boolean = false): PokemonSpeciesForm {
+    const species: PokemonSpecies = useIllusion && this.illusion.active ? this.illusion.species : this.species;
+    const formIndex: integer = useIllusion && this.illusion.active ? this.illusion.formIndex : this.formIndex;
+
     if (!ignoreOverride && this.summonData?.speciesForm) {
       return this.summonData.speciesForm;
     }
-    if (!this.species.forms?.length) {
-      return this.species;
+
+    if (!species.forms?.length || formIndex === undefined) {
+      return species;
     }
-    return this.species.forms[this.formIndex];
+
+    return species.forms[formIndex];
   }
 
-  getFusionSpeciesForm(ignoreOverride?: boolean): PokemonSpeciesForm {
+  /**
+   * @param {boolean} useIllusion - Whether we want the fusionSpeciesForm of the illusion or not.
+   */
+  getFusionSpeciesForm(ignoreOverride?: boolean, useIllusion: boolean = false): PokemonSpeciesForm {
+    const fusionSpecies: PokemonSpecies = useIllusion && this.illusion.active ? this.illusion.fusionSpecies : this.fusionSpecies;
+    const fusionFormIndex: integer = useIllusion && this.illusion.active ? this.illusion.fusionFormIndex : this.fusionFormIndex;
+
     if (!ignoreOverride && this.summonData?.speciesForm) {
       return this.summonData.fusionSpeciesForm;
     }
-    if (!this.fusionSpecies?.forms?.length || this.fusionFormIndex >= this.fusionSpecies?.forms.length) {
-      return this.fusionSpecies;
+    if (!fusionSpecies?.forms?.length || fusionFormIndex >= fusionSpecies?.forms.length) {
+      return fusionSpecies;
     }
-    return this.fusionSpecies?.forms[this.fusionFormIndex];
+    return fusionSpecies?.forms[fusionFormIndex];
   }
 
   getSprite(): Phaser.GameObjects.Sprite {
@@ -835,34 +984,77 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     }
   }
 
-  getGender(ignoreOverride?: boolean): Gender {
-    if (!ignoreOverride && this.summonData?.gender !== undefined) {
+  /**
+   * @param {boolean} useIllusion - Whether we want the gender of the illusion or not.
+   */
+  getGender(ignoreOverride?: boolean, useIllusion: boolean = false): Gender {
+    if (useIllusion && this.illusion.active) {
+      return this.illusion.gender;
+    } else if (!ignoreOverride && this.summonData?.gender !== undefined) {
       return this.summonData.gender;
     }
     return this.gender;
   }
 
-  getFusionGender(ignoreOverride?: boolean): Gender {
-    if (!ignoreOverride && this.summonData?.fusionGender !== undefined) {
+  /**
+   * @param {boolean} useIllusion - Whether we want the fusionGender of the illusion or not.
+   */
+  getFusionGender(ignoreOverride?: boolean, useIllusion: boolean = false): Gender {
+    if (useIllusion && this.illusion.active) {
+      return this.illusion.fusionGender;
+    } else if (!ignoreOverride && this.summonData?.fusionGender !== undefined) {
       return this.summonData.fusionGender;
     }
     return this.fusionGender;
   }
 
-  isShiny(): boolean {
-    return this.shiny || (this.isFusion() && this.fusionShiny);
+  isShiny(useIllusion: boolean = false): boolean {
+    if (!useIllusion && this.illusion.active) {
+      return this.illusion.shiny || (!!this.illusion.fusionSpecies && this.illusion.fusionShiny);
+    } else {
+      return this.shiny || (this.isFusion(useIllusion) && this.fusionShiny);
+    }
   }
 
-  getVariant(): Variant {
-    return !this.isFusion() ? this.variant : Math.max(this.variant, this.fusionVariant) as Variant;
+  isDoubleShiny(useIllusion: boolean = false): boolean {
+    if (!useIllusion && this.illusion.active) {
+      return this.isFusion(false) && this.illusion.shiny && this.illusion.fusionShiny;
+    } else {
+      return this.isFusion(useIllusion) && this.shiny && this.fusionShiny;
+    }
+  }
+
+  getVariant(useIllusion: boolean = false): Variant {
+    if (!useIllusion && this.illusion.active) {
+      return !this.isFusion(false) ? this.illusion.variant : Math.max(this.variant, this.fusionVariant) as Variant;
+    } else {
+      return !this.isFusion(true) ? this.variant : Math.max(this.variant, this.fusionVariant) as Variant;
+    }
+
+  }
+
+  getBaseVariant(doubleShiny: boolean): Variant {
+    if (doubleShiny) {
+      return this.illusion.active ? this.illusion.variant : this.variant;
+    } else {
+      return this.getVariant();
+    }
   }
 
   getLuck(): integer {
     return this.luck + (this.isFusion() ? this.fusionLuck : 0);
   }
 
-  isFusion(): boolean {
-    return !!this.fusionSpecies;
+  isFusion(useIllusion: boolean = false): boolean {
+    if (useIllusion && this.illusion.active) {
+      return !!this.illusion.fusionSpecies;
+    } else {
+      return !!this.fusionSpecies;
+    }
+  }
+
+  getName(illusion: boolean = false): string {
+    return (!illusion && this.illusion.active) ? this.illusion.name : this.name;
   }
 
   abstract isBoss(): boolean;
@@ -894,30 +1086,29 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
 
   /**
    * Gets the types of a pokemon
-   * @param includeTeraType boolean to include tera-formed type, default false
-   * @param forDefend boolean if the pokemon is defending from an attack
-   * @param ignoreOverride boolean if true, ignore ability changing effects
+   * @param {boolean} includeTeraType to include tera-formed type, default false
+   * @param {boolean} forDefend if the pokemon is defending from an attack
+   * @param {boolean} ignoreOverride if true, ignore ability changing effects
+   * @param {boolean} useIllusion whether we want he types of the illusion or not
    * @returns array of {@linkcode Type}
    */
-  getTypes(includeTeraType = false, forDefend: boolean = false, ignoreOverride?: boolean): Type[] {
-    const types = [];
-
+  getTypes(includeTeraType = false, forDefend: boolean = false, ignoreOverride?: boolean, useIllusion: boolean | "AUTO" = "AUTO"): Type[] {
+    const types: Type[] = [];
     if (includeTeraType) {
       const teraType = this.getTeraType();
       if (teraType !== Type.UNKNOWN) {
         types.push(teraType);
       }
     }
-
     if (!types.length || !includeTeraType) {
-      if (!ignoreOverride && this.summonData?.types) {
+      const doIllusion: boolean = useIllusion === "AUTO" ? !forDefend : useIllusion;
+      if (!ignoreOverride && this.summonData?.types && (!this.illusion.active || !doIllusion)) {
         this.summonData.types.forEach(t => types.push(t));
       } else {
-        const speciesForm = this.getSpeciesForm(ignoreOverride);
+        const speciesForm = this.getSpeciesForm(ignoreOverride, doIllusion);
 
         types.push(speciesForm.type1);
-
-        const fusionSpeciesForm = this.getFusionSpeciesForm(ignoreOverride);
+        const fusionSpeciesForm = this.getFusionSpeciesForm(ignoreOverride, doIllusion);
         if (fusionSpeciesForm) {
           if (fusionSpeciesForm.type2 !== null && fusionSpeciesForm.type2 !== speciesForm.type1) {
             types.push(fusionSpeciesForm.type2);
@@ -925,7 +1116,6 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
             types.push(fusionSpeciesForm.type1);
           }
         }
-
         if (types.length === 1 && speciesForm.type2 !== null) {
           types.push(speciesForm.type2);
         }
@@ -951,7 +1141,6 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
         types.splice(index, 1);
       }
     }
-
     return types;
   }
 
@@ -1179,12 +1368,13 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
    * @param source - The attacking Pokémon.
    * @param pokemonMove - The move being used by the attacking Pokémon.
    * @param ignoreAbility - Whether to check for abilities that might affect type effectiveness or immunity.
+   * @param {boolean} useIllusion - Whether we want the attack move effectiveness on the illusion or not
    * @returns The type damage multiplier, indicating the effectiveness of the move
    */
-  getAttackMoveEffectiveness(source: Pokemon, pokemonMove: PokemonMove, ignoreAbility: boolean = false): TypeDamageMultiplier {
+  getAttackMoveEffectiveness(source: Pokemon, pokemonMove: PokemonMove, ignoreAbility: boolean = false, useIllusion: boolean = false): TypeDamageMultiplier {
     const move = pokemonMove.getMove();
     const typeless = move.hasAttr(TypelessAttr);
-    const typeMultiplier = new Utils.NumberHolder(this.getAttackTypeEffectiveness(move, source));
+    const typeMultiplier = new Utils.NumberHolder(this.getAttackTypeEffectiveness(move, source, undefined, undefined, useIllusion));
     const cancelled = new Utils.BooleanHolder(false);
     applyMoveAttrs(VariableMoveTypeMultiplierAttr, source, this, move, typeMultiplier);
     if (!typeless && !ignoreAbility) {
@@ -1203,9 +1393,10 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
    * @param source the Pokemon using the move
    * @param ignoreStrongWinds whether or not this ignores strong winds (anticipation, forewarn, stealth rocks)
    * @param simulated tag to only apply the strong winds effect message when the move is used
+   * @param {boolean} useIllusion - Whether we want the attack type effectiveness on the illusion or not
    * @returns a multiplier for the type effectiveness
    */
-  getAttackTypeEffectiveness(moveOrType: Move | Type, source?: Pokemon, ignoreStrongWinds: boolean = false, simulated: boolean = true): TypeDamageMultiplier {
+  getAttackTypeEffectiveness(moveOrType: Move | Type, source?: Pokemon, ignoreStrongWinds: boolean = false, simulated: boolean = true, useIllusion: boolean = false): TypeDamageMultiplier {
     const move = (moveOrType instanceof Move)
       ? moveOrType
       : undefined;
@@ -1216,7 +1407,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     if (moveType === Type.STELLAR) {
       return this.isTerastallized() ? 2 : 1;
     }
-    const types = this.getTypes(true, true);
+    const types = this.getTypes(true, true, undefined, useIllusion);
 
     let multiplier = types.map(defType => {
       if (source) {
@@ -1253,12 +1444,12 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
 
   getMatchupScore(pokemon: Pokemon): number {
     const types = this.getTypes(true);
-    const enemyTypes = pokemon.getTypes(true, true);
+    const enemyTypes = pokemon.getTypes(true, true, false, true);
     const outspeed = (this.isActive(true) ? this.getBattleStat(Stat.SPD, pokemon) : this.getStat(Stat.SPD)) <= pokemon.getBattleStat(Stat.SPD, this);
-    let atkScore = pokemon.getAttackTypeEffectiveness(types[0], this) * (outspeed ? 1.25 : 1);
+    let atkScore = pokemon.getAttackTypeEffectiveness(types[0], this, false, false, true) * (outspeed ? 1.25 : 1);
     let defScore = 1 / Math.max(this.getAttackTypeEffectiveness(enemyTypes[0], pokemon), 0.25);
     if (types.length > 1) {
-      atkScore *= pokemon.getAttackTypeEffectiveness(types[1], this);
+      atkScore *= pokemon.getAttackTypeEffectiveness(types[1], this, false, false, true);
     }
     if (enemyTypes.length > 1) {
       defScore *= (1 / Math.max(this.getAttackTypeEffectiveness(enemyTypes[1], pokemon), 0.25));
@@ -3720,7 +3911,7 @@ export class EnemyPokemon extends Pokemon {
             if ((move.name.endsWith(" (N)") || !move.applyConditions(this, target, move)) && ![Moves.SUCKER_PUNCH, Moves.UPPER_HAND, Moves.THUNDERCLAP].includes(move.id)) {
               targetScore = -20;
             } else if (move instanceof AttackMove) {
-              const effectiveness = target.getAttackMoveEffectiveness(this, pokemonMove);
+              const effectiveness = target.getAttackMoveEffectiveness(this, pokemonMove, false, true);
               if (target.isPlayer() !== this.isPlayer()) {
                 targetScore *= effectiveness;
                 if (this.isOfType(move.type)) {
@@ -4017,6 +4208,91 @@ export class EnemyPokemon extends Pokemon {
   }
 }
 
+/**
+ * Illusion property
+ */
+interface Illusion {
+  /**
+   * Whether the illusion is active or not.
+   * @type {boolean}
+   */
+  active: boolean;
+  /**
+   * Whether the pokemon can generate an illusion or not.
+   * @type {boolean}
+   */
+  available: boolean;
+  /**
+   * The stored name of the pokemon.
+   * @type {string}
+   */
+  name?: string;
+  /**
+   * The stored nickname of the pokemon.
+   * @type {string}
+   */
+  nickname?: string;
+  /**
+   * The species of the illusion.
+   * @type {PokemonSpecies}
+   */
+  species?: PokemonSpecies;
+  /**
+   * The formIndex of the illusion
+   * @type {integer}
+   */
+  formIndex?: integer;
+  /**
+   * Store whether the base pokemon is shiny or not.
+   * @type {boolean}
+   */
+  shiny?: boolean;
+  /**
+   * The shiny variant of the base pokemon.
+   * @type {Variant}
+   */
+  variant?: Variant;
+  /**
+   * The shinysparkles of the base pokemon.
+   * @type {Phaser.GameObjects.Sprite}
+   */
+  shinySparkle?: Phaser.GameObjects.Sprite;
+  /**
+   * The gender of the illusion
+   * @type {Gender}
+   */
+  gender?: Gender;
+  /**
+   * The pokeball of the illusion.
+   */
+  pokeball?: PokeballType;
+  /**
+   * The fusionned species of the illusion if it's a fusion.
+   * @type {PokemonSpecies}
+   */
+  fusionSpecies?: PokemonSpecies;
+  /**
+   * The fusionFormIndex of the illusion
+   * @type {integer}
+   */
+  fusionFormIndex?: integer;
+  /**
+   * Whether the fusionned species of the base pokemon is shiny or not.
+   * @type {PokemonSpecies}
+   */
+  fusionShiny?: boolean;
+  /**
+   * The variant of the fusionned species of the base pokemon.
+   * @type {Variant}
+   */
+  fusionVariant?: Variant;
+  /**
+   * The fusionGender of the illusion if it's a fusion
+   * @type {Gender}
+   */
+  fusionGender?: Gender;
+}
+
 export interface TurnMove {
   move: Moves;
   targets?: BattlerIndex[];
diff --git a/src/locales/de/ability-trigger.ts b/src/locales/de/ability-trigger.ts
index 88dc9f9f027..5164b294570 100644
--- a/src/locales/de/ability-trigger.ts
+++ b/src/locales/de/ability-trigger.ts
@@ -10,6 +10,7 @@ export const abilityTriggers: SimpleTranslationEntries = {
   "trace": "{{pokemonName}} kopiert {{abilityName}} von {{targetName}}!",
   "windPowerCharged": "Der Treffer durch {{moveName}} läd die Stärke von {{pokemonName}} auf!",
   "quickDraw": "Durch Schnellschuss kann {{pokemonName}} schneller handeln als sonst!",
+  "illusionBreak": "Das Trugbild von {{pokemonName}} verschwindet!",
   "blockItemTheft": "{{abilityName}} von {{pokemonNameWithAffix}} verhindert Item-Diebstahl!",
   "typeImmunityHeal": "{{abilityName}} von {{pokemonNameWithAffix}} füllte einige KP auf!",
   "nonSuperEffectiveImmunity": "{{pokemonNameWithAffix}} vermeidet Schaden mit {{abilityName}}!",
diff --git a/src/locales/en/ability-trigger.ts b/src/locales/en/ability-trigger.ts
index ce41a964922..c5ee9a858fd 100644
--- a/src/locales/en/ability-trigger.ts
+++ b/src/locales/en/ability-trigger.ts
@@ -10,6 +10,7 @@ export const abilityTriggers: SimpleTranslationEntries = {
   "trace": "{{pokemonName}} copied {{targetName}}'s\n{{abilityName}}!",
   "windPowerCharged": "Being hit by {{moveName}} charged {{pokemonName}} with power!",
   "quickDraw": "{{pokemonName}} can act faster than normal, thanks to its Quick Draw!",
+  "illusionBreak": "{{pokemonName}}'s illusion wore off!",
   "blockItemTheft": "{{pokemonNameWithAffix}}'s {{abilityName}}\nprevents item theft!",
   "typeImmunityHeal": "{{pokemonNameWithAffix}}'s {{abilityName}}\nrestored its HP a little!",
   "nonSuperEffectiveImmunity": "{{pokemonNameWithAffix}} avoided damage\nwith {{abilityName}}!",
diff --git a/src/locales/es/ability-trigger.ts b/src/locales/es/ability-trigger.ts
index 6b1f66a11e3..df0fb1b3bf5 100644
--- a/src/locales/es/ability-trigger.ts
+++ b/src/locales/es/ability-trigger.ts
@@ -11,6 +11,7 @@ export const abilityTriggers: SimpleTranslationEntries = {
   "windPowerCharged": "¡{{pokemonName}} se ha cargado de electricidad gracias a {{moveName}}!",
   "quickDraw": "{{pokemonName}} can act faster than normal, thanks to its Quick Draw!",
   "blockItemTheft": "{{pokemonNameWithAffix}}'s {{abilityName}}\nprevents item theft!",
+  "illusionBreak": "¡La ilusión de {{pokemonName}} se ha desvanecido!",
   "typeImmunityHeal": "{{pokemonNameWithAffix}}'s {{abilityName}}\nrestored its HP a little!",
   "nonSuperEffectiveImmunity": "{{pokemonNameWithAffix}} avoided damage\nwith {{abilityName}}!",
   "postDefendDisguise": "{{pokemonNameWithAffix}}'s disguise was busted!",
diff --git a/src/locales/fr/ability-trigger.ts b/src/locales/fr/ability-trigger.ts
index f6b9c306cd1..b97fe3877ac 100644
--- a/src/locales/fr/ability-trigger.ts
+++ b/src/locales/fr/ability-trigger.ts
@@ -9,6 +9,7 @@ export const abilityTriggers: SimpleTranslationEntries = {
   "poisonHeal": "{{abilityName}} de {{pokemonName}}\nrestaure un peu ses PV !",
   "trace": "{{pokemonName}} copie le talent {{abilityName}}\nde {{targetName}} !",
   "windPowerCharged": "{{pokemonName}} a été touché par la capacité {{moveName}} et se charge en électricité !",
+  "illusionBreak": "L’illusion de {{pokemonName}} se brise !",
   "quickDraw": "Tir Vif permet à {{pokemonName}}\nd’agir plus vite que d’habitude !",
   "blockItemTheft": "{{abilityName}} de {{pokemonNameWithAffix}}\nempêche son objet d’être volé !",
   "typeImmunityHeal": "{{abilityName}} de {{pokemonNameWithAffix}}\nrestaure un peu ses PV !",
diff --git a/src/locales/it/ability-trigger.ts b/src/locales/it/ability-trigger.ts
index 37472dbdeab..fa5f9d3102f 100644
--- a/src/locales/it/ability-trigger.ts
+++ b/src/locales/it/ability-trigger.ts
@@ -10,6 +10,7 @@ export const abilityTriggers: SimpleTranslationEntries = {
   "trace": "L'abilità {{abilityName}} di {{targetName}}\nviene copiata da {{pokemonName}} con Traccia!",
   "windPowerCharged": "Venire colpito da {{moveName}} ha caricato {{pokemonName}}!",
   "quickDraw":"{{pokemonName}} agisce più rapidamente del normale grazie a Colpolesto!",
+  "illusionBreak": "L'illusione di {{pokemonName}} si dissolve!",
   "blockItemTheft": "{{abilityName}} di {{pokemonNameWithAffix}}\nlo rende immune ai furti!",
   "typeImmunityHeal": "{{pokemonName}} recupera alcuni PS\ncon {{abilityName}}!",
   "nonSuperEffectiveImmunity": "{{pokemonNameWithAffix}} evita il colpo\ncon {{abilityName}}!",
diff --git a/src/locales/ko/ability-trigger.ts b/src/locales/ko/ability-trigger.ts
index 61be21bc7ec..0fbf17780fc 100644
--- a/src/locales/ko/ability-trigger.ts
+++ b/src/locales/ko/ability-trigger.ts
@@ -10,6 +10,7 @@ export const abilityTriggers: SimpleTranslationEntries = {
   "trace": "{{pokemonName}}[[는]] 상대 {{targetName}}의 \n{{abilityName}}[[를]] 트레이스했다!",
   "windPowerCharged": "{{pokemonName}}[[는]]\n{{moveName}}에 맞아 충전되었다!",
   "quickDraw": "{{pokemonName}}[[는]]\n퀵드로에 의해 행동이 빨라졌다!",
+  "illusionBreak": "{{pokemonName}}의\n일루전이 풀렸다!",
   "blockItemTheft": "{{pokemonNameWithAffix}}의 {{abilityName}}에 의해\n도구를 빼앗기지 않는다!",
   "typeImmunityHeal": "{{pokemonNameWithAffix}}[[는]]\n{{abilityName}}[[로]] 체력이 회복되었다!",
   "nonSuperEffectiveImmunity": "{{pokemonNameWithAffix}}[[는]] {{abilityName}} 때문에\n데미지를 입지 않는다!",
diff --git a/src/locales/pt_BR/ability-trigger.ts b/src/locales/pt_BR/ability-trigger.ts
index f5d9511f3f6..61342c22218 100644
--- a/src/locales/pt_BR/ability-trigger.ts
+++ b/src/locales/pt_BR/ability-trigger.ts
@@ -10,6 +10,7 @@ export const abilityTriggers: SimpleTranslationEntries = {
   "trace": "{{pokemonName}} copiou {{abilityName}}\nde {{targetName}}!",
   "windPowerCharged": "Ser atingido por {{moveName}} carregou {{pokemonName}} com poder!",
   "quickDraw": "{{pokemonName}} pode agir mais rápido que o normal\ngraças ao seu Quick Draw!",
+  "illusionBreak": "A ilusão de {{pokemonName}} acabou!",
   "blockItemTheft": "{{abilityName}} de {{pokemonNameWithAffix}}\nprevine o roubo de itens!",
   "typeImmunityHeal": "{{abilityName}} de {{pokemonNameWithAffix}}\nrestaurou um pouco de PS!",
   "nonSuperEffectiveImmunity": "{{pokemonNameWithAffix}} evitou dano\ncom {{abilityName}}!",
diff --git a/src/locales/pt_BR/config.ts b/src/locales/pt_BR/config.ts
index ce4576646c2..3a44105b8a4 100644
--- a/src/locales/pt_BR/config.ts
+++ b/src/locales/pt_BR/config.ts
@@ -1,5 +1,6 @@
 import { ability } from "./ability";
 import { abilityTriggers } from "./ability-trigger";
+import { arenaFlyout } from "./arena-flyout";
 import { PGFachv, PGMachv } from "./achv";
 import { arenaFlyout } from "./arena-flyout";
 import { arenaTag } from "./arena-tag";
diff --git a/src/locales/zh_CN/ability-trigger.ts b/src/locales/zh_CN/ability-trigger.ts
index 0f2201049d2..d19a0702515 100644
--- a/src/locales/zh_CN/ability-trigger.ts
+++ b/src/locales/zh_CN/ability-trigger.ts
@@ -10,6 +10,7 @@ export const abilityTriggers: SimpleTranslationEntries = {
   "trace": "{{pokemonName}}复制了{{targetName}}的\n{{abilityName}}！",
   "windPowerCharged": "受{{moveName}}的影响，{{pokemonName}}提升了能力！",
   "quickDraw":"因为速击效果发动，\n{{pokemonName}}比平常出招更快了！",
+  "illusionBreak": "{{pokemonName}}造成的\n幻觉被解除了！",
   "blockItemTheft": "{{pokemonNameWithAffix}}的{{abilityName}}\n阻止了对方夺取道具！",
   "typeImmunityHeal": "{{pokemonNameWithAffix}}因{{abilityName}}\n回复了少许HP！",
   "nonSuperEffectiveImmunity": "{{pokemonNameWithAffix}}因{{abilityName}}\n避免了伤害！",
diff --git a/src/locales/zh_TW/ability-trigger.ts b/src/locales/zh_TW/ability-trigger.ts
index baa20614a44..2f89c47f1ab 100644
--- a/src/locales/zh_TW/ability-trigger.ts
+++ b/src/locales/zh_TW/ability-trigger.ts
@@ -10,6 +10,7 @@ export const abilityTriggers: SimpleTranslationEntries = {
   "trace": "{{pokemonName}} 複製了 {{targetName}} 的\n{{abilityName}}!",
   "windPowerCharged": "受 {{moveName}} 的影響， {{pokemonName}} 提升了能力！",
   "quickDraw":"{{pokemonName}} can act faster than normal, thanks to its Quick Draw!",
+  "illusionBreak": "{{pokemonName}}造成的\n幻覺解除了！",
   "blockItemTheft": "{{pokemonNameWithAffix}}'s {{abilityName}}\nprevents item theft!",
   "typeImmunityHeal": "{{pokemonNameWithAffix}}'s {{abilityName}}\nrestored its HP a little!",
   "nonSuperEffectiveImmunity": "{{pokemonNameWithAffix}} avoided damage\nwith {{abilityName}}!",
diff --git a/src/messages.ts b/src/messages.ts
index 2259e78abfc..ed0880ef36b 100644
--- a/src/messages.ts
+++ b/src/messages.ts
@@ -18,23 +18,23 @@ export function getPokemonMessage(pokemon: Pokemon, content: string): string {
  * @param pokemon {@linkcode Pokemon} name and battle context will be retrieved from this instance
  * @returns {string} ex: "Wild Gengar", "Ectoplasma sauvage"
  */
-export function getPokemonNameWithAffix(pokemon: Pokemon): string {
+export function getPokemonNameWithAffix(pokemon: Pokemon, useIllusion: boolean = true): string {
   switch (pokemon.scene.currentBattle.battleSpec) {
   case BattleSpec.DEFAULT:
     return !pokemon.isPlayer()
       ? pokemon.hasTrainer()
         ? i18next.t("battle:foePokemonWithAffix", {
-          pokemonName: pokemon.getNameToRender(),
+          pokemonName: pokemon.getNameToRender(useIllusion),
         })
         : i18next.t("battle:wildPokemonWithAffix", {
-          pokemonName: pokemon.getNameToRender(),
+          pokemonName: pokemon.getNameToRender(useIllusion),
         })
-      : pokemon.getNameToRender();
+      : pokemon.getNameToRender(useIllusion);
   case BattleSpec.FINAL_BOSS:
     return !pokemon.isPlayer()
-      ? i18next.t("battle:foePokemonWithAffix", { pokemonName: pokemon.getNameToRender() })
-      : pokemon.getNameToRender();
+      ? i18next.t("battle:foePokemonWithAffix", { pokemonName: pokemon.getNameToRender(useIllusion) })
+      : pokemon.getNameToRender(useIllusion);
   default:
-    return pokemon.getNameToRender();
+    return pokemon.getNameToRender(useIllusion);
   }
 }
diff --git a/src/phases.ts b/src/phases.ts
index c41ad333b9d..d444a4ab63a 100644
--- a/src/phases.ts
+++ b/src/phases.ts
@@ -25,7 +25,10 @@ import { Starter } from "./ui/starter-select-ui-handler";
 import { Gender } from "./data/gender";
 import { Weather, WeatherType, getRandomWeatherType, getTerrainBlockMessage, getWeatherDamageMessage, getWeatherLapseMessage } from "./data/weather";
 import { ArenaTagSide, ArenaTrapTag, MistTag, TrickRoomTag } from "./data/arena-tag";
-import { CheckTrappedAbAttr, PostAttackAbAttr, PostBattleAbAttr, PostDefendAbAttr, PostSummonAbAttr, PostTurnAbAttr, PostWeatherLapseAbAttr, PreSwitchOutAbAttr, PreWeatherDamageAbAttr, ProtectStatAbAttr, RedirectMoveAbAttr, BlockRedirectAbAttr, RunSuccessAbAttr, StatChangeMultiplierAbAttr, SuppressWeatherEffectAbAttr, SyncEncounterNatureAbAttr, applyAbAttrs, applyCheckTrappedAbAttrs, applyPostAttackAbAttrs, applyPostBattleAbAttrs, applyPostDefendAbAttrs, applyPostSummonAbAttrs, applyPostTurnAbAttrs, applyPostWeatherLapseAbAttrs, applyPreStatChangeAbAttrs, applyPreSwitchOutAbAttrs, applyPreWeatherEffectAbAttrs, IncrementMovePriorityAbAttr, applyPostVictoryAbAttrs, PostVictoryAbAttr, BlockNonDirectDamageAbAttr as BlockNonDirectDamageAbAttr, applyPostKnockOutAbAttrs, PostKnockOutAbAttr, PostBiomeChangeAbAttr, applyPostFaintAbAttrs, PostFaintAbAttr, IncreasePpAbAttr, PostStatChangeAbAttr, applyPostStatChangeAbAttrs, AlwaysHitAbAttr, PreventBerryUseAbAttr, StatChangeCopyAbAttr, PokemonTypeChangeAbAttr, applyPreAttackAbAttrs, applyPostMoveUsedAbAttrs, PostMoveUsedAbAttr, MaxMultiHitAbAttr, HealFromBerryUseAbAttr, IgnoreMoveEffectsAbAttr, BlockStatusDamageAbAttr, BypassSpeedChanceAbAttr, AddSecondStrikeAbAttr } from "./data/ability";
+import {
+  CheckTrappedAbAttr, PreSummonAbAttr, PostAttackAbAttr, PostBattleAbAttr, PostDefendAbAttr, PostSummonAbAttr, PostTurnAbAttr, PostWeatherLapseAbAttr, PreSwitchOutAbAttr, PreWeatherDamageAbAttr, ProtectStatAbAttr, RedirectMoveAbAttr, BlockRedirectAbAttr, RunSuccessAbAttr, StatChangeMultiplierAbAttr, SuppressWeatherEffectAbAttr, SyncEncounterNatureAbAttr,
+  applyAbAttrs, applyCheckTrappedAbAttrs, applyPreSummonAbAttrs, applyPostAttackAbAttrs, applyPostBattleAbAttrs, applyPostDefendAbAttrs, applyPostSummonAbAttrs, applyPostTurnAbAttrs, applyPostWeatherLapseAbAttrs, applyPreStatChangeAbAttrs, applyPreSwitchOutAbAttrs, applyPreWeatherEffectAbAttrs, IncrementMovePriorityAbAttr, applyPostVictoryAbAttrs, PostVictoryAbAttr, BlockNonDirectDamageAbAttr as BlockNonDirectDamageAbAttr, applyPostKnockOutAbAttrs, PostKnockOutAbAttr, PostBiomeChangeAbAttr, applyPostFaintAbAttrs, PostFaintAbAttr, IncreasePpAbAttr, PostStatChangeAbAttr, applyPostStatChangeAbAttrs, AlwaysHitAbAttr, PreventBerryUseAbAttr, StatChangeCopyAbAttr, PokemonTypeChangeAbAttr, applyPreAttackAbAttrs, applyPostMoveUsedAbAttrs, PostMoveUsedAbAttr, MaxMultiHitAbAttr, HealFromBerryUseAbAttr, IgnoreMoveEffectsAbAttr, BlockStatusDamageAbAttr, BypassSpeedChanceAbAttr, AddSecondStrikeAbAttr
+} from "./data/ability";
 import { Unlockables, getUnlockableName } from "./system/unlockables";
 import { getBiomeKey } from "./field/arena";
 import { BattleType, BattlerIndex, TurnCommand } from "./battle";
@@ -842,6 +845,7 @@ export class EncounterPhase extends BattlePhase {
           });
         }
       }
+
       const enemyPokemon = this.scene.getEnemyParty()[e];
       if (e < (battle.double ? 2 : 1)) {
         enemyPokemon.setX(-66 + enemyPokemon.getFieldPositionOffset()[0]);
@@ -895,6 +899,8 @@ export class EncounterPhase extends BattlePhase {
       battle.enemyParty.forEach((enemyPokemon, e) => {
         if (e < (battle.double ? 2 : 1)) {
           if (battle.battleType === BattleType.WILD) {
+
+            applyPreSummonAbAttrs(PreSummonAbAttr, enemyPokemon, []);
             this.scene.field.add(enemyPokemon);
             battle.seenEnemyPartyMemberIds.add(enemyPokemon.id);
             const playerPokemon = this.scene.getPlayerPokemon();
@@ -1058,7 +1064,7 @@ export class EncounterPhase extends BattlePhase {
     const enemyField = this.scene.getEnemyField();
 
     enemyField.forEach((enemyPokemon, e) => {
-      if (enemyPokemon.isShiny()) {
+      if (enemyPokemon.isShiny(true)) {
         this.scene.unshiftPhase(new ShinySparklePhase(this.scene, BattlerIndex.ENEMY + e));
       }
     });
@@ -1378,7 +1384,8 @@ export class SummonPhase extends PartyMemberPokemonPhase {
   start() {
     super.start();
 
-    this.preSummon();
+    const pokemon = this.getPokemon();
+    applyPreSummonAbAttrs(PreSummonAbAttr, pokemon).then(() => this.preSummon());
   }
 
   /**
@@ -1447,8 +1454,7 @@ export class SummonPhase extends PartyMemberPokemonPhase {
 
   summon(): void {
     const pokemon = this.getPokemon();
-
-    const pokeball = this.scene.addFieldSprite(this.player ? 36 : 248, this.player ? 80 : 44, "pb", getPokeballAtlasKey(pokemon.pokeball));
+    const pokeball = this.scene.addFieldSprite(this.player ? 36 : 248, this.player ? 80 : 44, "pb", getPokeballAtlasKey(pokemon.illusion.pokeball ?? pokemon.pokeball));
     pokeball.setVisible(false);
     pokeball.setOrigin(0.5, 0.625);
     this.scene.field.add(pokeball);
@@ -1494,7 +1500,7 @@ export class SummonPhase extends PartyMemberPokemonPhase {
               }
               this.scene.currentBattle.seenEnemyPartyMemberIds.add(pokemon.id);
             }
-            addPokeballOpenParticles(this.scene, pokemon.x, pokemon.y - 16, pokemon.pokeball);
+            addPokeballOpenParticles(this.scene, pokemon.x, pokemon.y - 16, pokemon.illusion.pokeball ?? pokemon.pokeball);
             this.scene.updateModifiers(this.player);
             this.scene.updateFieldScale();
             pokemon.showInfo();
@@ -1502,7 +1508,7 @@ export class SummonPhase extends PartyMemberPokemonPhase {
             pokemon.setVisible(true);
             pokemon.getSprite().setVisible(true);
             pokemon.setScale(0.5);
-            pokemon.tint(getPokeballTintColor(pokemon.pokeball));
+            pokemon.tint(getPokeballTintColor(pokemon.illusion.pokeball ?? pokemon.pokeball));
             pokemon.untint(250, "Sine.easeIn");
             this.scene.updateFieldScale();
             this.scene.tweens.add({
@@ -1526,7 +1532,7 @@ export class SummonPhase extends PartyMemberPokemonPhase {
   onEnd(): void {
     const pokemon = this.getPokemon();
 
-    if (pokemon.isShiny()) {
+    if (pokemon.isShiny(true)) {
       this.scene.unshiftPhase(new ShinySparklePhase(this.scene, pokemon.getBattlerIndex()));
     }
 
@@ -1587,7 +1593,10 @@ export class SwitchSummonPhase extends SummonPhase {
         this.scene.pbTrayEnemy.showPbTray(this.scene.getEnemyParty());
       }
     }
+    const pokemon: Pokemon = this.getPokemon();
 
+    // if doReturn === False OR slotIndex !== -1 (slotIndex is valid) and the pokemon doesn't exist/is false
+    // then switchAndSummon(), manually pick pokemon to switch into
     if (!this.doReturn || (this.slotIndex !== -1 && !(this.player ? this.scene.getParty() : this.scene.getEnemyParty())[this.slotIndex])) {
       if (this.player) {
         return this.switchAndSummon();
@@ -1597,8 +1606,6 @@ export class SwitchSummonPhase extends SummonPhase {
       }
     }
 
-    const pokemon = this.getPokemon();
-
     if (!this.batonPass) {
       (this.player ? this.scene.getEnemyField() : this.scene.getPlayerField()).forEach(enemyPokemon => enemyPokemon.removeTagsBySourceId(pokemon.id));
     }
@@ -1612,7 +1619,7 @@ export class SwitchSummonPhase extends SummonPhase {
     );
     this.scene.playSound("pb_rel");
     pokemon.hideInfo();
-    pokemon.tint(getPokeballTintColor(pokemon.pokeball), 1, 250, "Sine.easeIn");
+    pokemon.tint(getPokeballTintColor(pokemon.illusion.pokeball ?? pokemon.pokeball), 1, 250, "Sine.easeIn");
     this.scene.tweens.add({
       targets: pokemon,
       duration: 250,
@@ -1631,6 +1638,8 @@ export class SwitchSummonPhase extends SummonPhase {
     const party = this.player ? this.getParty() : this.scene.getEnemyParty();
     const switchedPokemon = party[this.slotIndex];
     this.lastPokemon = this.getPokemon();
+
+    applyPreSummonAbAttrs(PreSummonAbAttr, switchedPokemon);
     applyPreSwitchOutAbAttrs(PreSwitchOutAbAttr, this.lastPokemon);
     if (this.batonPass && switchedPokemon) {
       (this.player ? this.scene.getEnemyField() : this.scene.getPlayerField()).forEach(enemyPokemon => enemyPokemon.transferTagsBySourceId(this.lastPokemon.id, switchedPokemon.id));
@@ -4470,6 +4479,7 @@ export class SwitchPhase extends BattlePhase {
       }
       this.scene.ui.setMode(Mode.MESSAGE).then(() => super.end());
     }, PartyUiHandler.FilterNonFainted);
+
   }
 }
 
diff --git a/src/test/abilities/illusion.test.ts b/src/test/abilities/illusion.test.ts
new file mode 100644
index 00000000000..39683b956ec
--- /dev/null
+++ b/src/test/abilities/illusion.test.ts
@@ -0,0 +1,127 @@
+import { afterEach, beforeAll, beforeEach, describe, expect, it, vi } from "vitest";
+import Phaser from "phaser";
+import GameManager from "#app/test/utils/gameManager";
+import overrides from "#app/overrides";
+import { Species } from "#enums/species";
+import { Gender } from "../../data/gender";
+import { PokeballType } from "../../data/pokeball";
+import {
+  TurnEndPhase,
+} from "#app/phases";
+import { Moves } from "#enums/moves";
+import { getMovePosition } from "#app/test/utils/gameManagerUtils";
+import { Abilities } from "#enums/abilities";
+
+describe("Abilities - Illusion", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    vi.spyOn(overrides, "BATTLE_TYPE_OVERRIDE", "get").mockReturnValue("single");
+    vi.spyOn(overrides, "OPP_SPECIES_OVERRIDE", "get").mockReturnValue(Species.ZORUA);
+    vi.spyOn(overrides, "OPP_ABILITY_OVERRIDE", "get").mockReturnValue(Abilities.ILLUSION);
+    vi.spyOn(overrides, "OPP_MOVESET_OVERRIDE", "get").mockReturnValue([Moves.TACKLE, Moves.TACKLE, Moves.TACKLE, Moves.TACKLE]);
+    vi.spyOn(overrides, "OPP_HELD_ITEMS_OVERRIDE", "get").mockReturnValue([{name: "WIDE_LENS", count: 3}]);
+
+    vi.spyOn(overrides, "MOVESET_OVERRIDE", "get").mockReturnValue([Moves.WORRY_SEED, Moves.SOAK, Moves.TACKLE, Moves.TACKLE]);
+    vi.spyOn(overrides, "STARTING_HELD_ITEMS_OVERRIDE", "get").mockReturnValue([{name: "WIDE_LENS", count: 3}]);
+  });
+
+  it("create illusion at the start", async () => {
+    await game.startBattle([Species.ZOROARK, Species.AXEW]);
+
+    const zoroark = game.scene.getPlayerPokemon();
+    const zorua = game.scene.getEnemyPokemon();
+
+    expect(zoroark.illusion.active).equals(true);
+    expect(zorua.illusion.active).equals(true);
+    expect(zoroark.illusion.available).equals(false);
+
+  });
+
+  it("disappear after receiving damaging move and changing ability move", async () => {
+    await game.startBattle([Species.ZOROARK, Species.AXEW]);
+    game.doAttack(getMovePosition(game.scene, 0, Moves.WORRY_SEED));
+
+    await game.phaseInterceptor.to(TurnEndPhase);
+
+    const zoroark = game.scene.getPlayerPokemon();
+    const zorua = game.scene.getEnemyPokemon();
+
+    expect(zorua.illusion.active).equals(false);
+    expect(zoroark.illusion.active).equals(false);
+  });
+
+  it("disappear if the ability is suppressed", async () => {
+    vi.spyOn(overrides, "ABILITY_OVERRIDE", "get").mockReturnValue(Abilities.NEUTRALIZING_GAS);
+    await game.startBattle([Species.KOFFING]);
+
+    const zorua = game.scene.getEnemyPokemon();
+
+    expect(zorua.illusion.active).equals(false);
+  });
+
+  it("trick the enemy AI", async () => {
+    vi.spyOn(overrides, "OPP_MOVESET_OVERRIDE", "get").mockReturnValue([Moves.FLAMETHROWER, Moves.PSYCHIC, Moves.TACKLE, Moves.TACKLE]);
+    await game.startBattle([Species.ZOROARK, Species.AXEW]);
+
+    const enemy = game.scene.getEnemyPokemon();
+    const zoroark = game.scene.getPlayerPokemon();
+
+    const flameThwowerEffectiveness = zoroark.getAttackMoveEffectiveness(enemy, enemy.getMoveset()[0], false, true);
+    const psychicEffectiveness = zoroark.getAttackMoveEffectiveness(enemy, enemy.getMoveset()[1], false, true);
+
+    expect(psychicEffectiveness).above(flameThwowerEffectiveness);
+  });
+
+  it("do not disappear if the pokemon takes indirect damages", async () => {
+    vi.spyOn(overrides, "OPP_SPECIES_OVERRIDE", "get").mockReturnValue(Species.GIGALITH);
+    vi.spyOn(overrides, "OPP_ABILITY_OVERRIDE", "get").mockReturnValue(Abilities.SAND_STREAM);
+    vi.spyOn(overrides, "OPP_MOVESET_OVERRIDE", "get").mockReturnValue([Moves.WILL_O_WISP, Moves.WILL_O_WISP, Moves.WILL_O_WISP, Moves.WILL_O_WISP]);
+    vi.spyOn(overrides, "MOVESET_OVERRIDE", "get").mockReturnValue([Moves.FLARE_BLITZ]);
+
+    await game.startBattle([Species.ZOROARK, Species.AZUMARILL]);
+
+    game.doAttack(getMovePosition(game.scene, 0, Moves.FLARE_BLITZ));
+
+    await game.phaseInterceptor.to(TurnEndPhase);
+
+    const zoroark = game.scene.getPlayerPokemon();
+
+    expect(zoroark.illusion.active).equals(true);
+  });
+
+  it("copy the the name, the nickname, the gender, the shininess and the pokeball of the pokemon", async () => {
+    vi.spyOn(overrides, "OPP_MOVESET_OVERRIDE", "get").mockReturnValue([Moves.SCARY_FACE, Moves.SCARY_FACE, Moves.SCARY_FACE, Moves.SCARY_FACE]);
+
+    await game.startBattle([Species.ABRA, Species.ZOROARK, Species.AXEW]);
+
+    const axew = game.scene.getParty().at(2);
+    axew.shiny = true;
+    axew.nickname = btoa(unescape(encodeURIComponent("axew nickname")));
+    axew.gender = Gender.FEMALE;
+    axew.pokeball = PokeballType.GREAT_BALL;
+
+    game.doSwitchPokemon(1);
+
+    await game.phaseInterceptor.to(TurnEndPhase);
+
+    const zoroark = game.scene.getPlayerPokemon();
+    expect(zoroark.name).equals("Axew");
+    expect(zoroark.getNameToRender()).equals("axew nickname");
+    expect(zoroark.getGender(false, true)).equals(Gender.FEMALE);
+    expect(zoroark.isShiny(true)).equals(true);
+    expect(zoroark.illusion.pokeball).equals(PokeballType.GREAT_BALL);
+  });
+});
diff --git a/src/ui/battle-info.ts b/src/ui/battle-info.ts
index d78b05a569f..efd589aee9c 100644
--- a/src/ui/battle-info.ts
+++ b/src/ui/battle-info.ts
@@ -298,7 +298,7 @@ export default class BattleInfo extends Phaser.GameObjects.Container {
     });
     this.teraIcon.on("pointerout", () => (this.scene as BattleScene).ui.hideTooltip());
 
-    const isFusion = pokemon.isFusion();
+    const isFusion = pokemon.isFusion(true);
 
     this.splicedIcon.setPositionRelative(this.nameText, nameTextWidth + this.genderText.displayWidth + 1 + (this.teraIcon.visible ? this.teraIcon.displayWidth + 1 : 0), 2.5);
     this.splicedIcon.setVisible(isFusion);
@@ -308,7 +308,7 @@ export default class BattleInfo extends Phaser.GameObjects.Container {
     }
 
     const doubleShiny = isFusion && pokemon.shiny && pokemon.fusionShiny;
-    const baseVariant = !doubleShiny ? pokemon.getVariant() : pokemon.variant;
+    const baseVariant = !doubleShiny ? pokemon.getVariant(true) : pokemon.variant;
 
     this.shinyIcon.setPositionRelative(this.nameText, nameTextWidth + this.genderText.displayWidth + 1 + (this.teraIcon.visible ? this.teraIcon.displayWidth + 1 : 0) + (this.splicedIcon.visible ? this.splicedIcon.displayWidth + 1 : 0), 2.5);
     this.shinyIcon.setTexture(`shiny_star${doubleShiny ? "_1" : ""}`);
@@ -510,6 +510,11 @@ export default class BattleInfo extends Phaser.GameObjects.Container {
         return resolve();
       }
 
+      const gender: Gender = pokemon.illusion.active ? pokemon.illusion.gender : pokemon.gender;
+
+      this.genderText.setText(getGenderSymbol(gender));
+      this.genderText.setColor(getGenderColor(gender));
+
       const nameUpdated = this.lastName !== pokemon.getNameToRender();
 
       if (nameUpdated) {
@@ -527,8 +532,10 @@ export default class BattleInfo extends Phaser.GameObjects.Container {
         this.lastTeraType = teraType;
       }
 
+      const isFusion = pokemon.isFusion(true);
+
       if (nameUpdated || teraTypeUpdated) {
-        this.splicedIcon.setVisible(!!pokemon.fusionSpecies);
+        this.splicedIcon.setVisible(isFusion);
 
         this.teraIcon.setPositionRelative(this.nameText, this.nameText.displayWidth + this.genderText.displayWidth + 1, 2);
         this.splicedIcon.setPositionRelative(this.nameText, this.nameText.displayWidth + this.genderText.displayWidth + 1 + (this.teraIcon.visible ? this.teraIcon.displayWidth + 1 : 0), 1.5);
@@ -630,7 +637,17 @@ export default class BattleInfo extends Phaser.GameObjects.Container {
         this.lastBattleStats = battleStatsStr;
       }
 
-      this.shinyIcon.setVisible(pokemon.isShiny());
+      this.shinyIcon.setVisible(pokemon.isShiny(true));
+
+      const doubleShiny = isFusion && pokemon.shiny && pokemon.fusionShiny;
+      const baseVariant = !doubleShiny ? pokemon.getVariant(true) : pokemon.variant;
+      this.shinyIcon.setTint(getVariantTint(baseVariant));
+
+      this.fusionShinyIcon.setVisible(doubleShiny);
+      if (isFusion) {
+        this.fusionShinyIcon.setTint(getVariantTint(pokemon.fusionVariant));
+      }
+      this.fusionShinyIcon.setPosition(this.shinyIcon.x, this.shinyIcon.y);
 
       resolve();
     });
@@ -643,7 +660,8 @@ export default class BattleInfo extends Phaser.GameObjects.Container {
     const nameSizeTest = addTextObject(this.scene, 0, 0, displayName, TextStyle.BATTLE_INFO);
     nameTextWidth = nameSizeTest.displayWidth;
 
-    while (nameTextWidth > (this.player || !this.boss ? 60 : 98) - ((pokemon.gender !== Gender.GENDERLESS ? 6 : 0) + (pokemon.fusionSpecies ? 8 : 0) + (pokemon.isShiny() ? 8 : 0) + (Math.min(pokemon.level.toString().length, 3) - 3) * 8)) {
+    const gender: Gender = pokemon.illusion.active ? pokemon.illusion.gender : pokemon.gender;
+    while (nameTextWidth > (this.player || !this.boss ? 60 : 98) - ((gender !== Gender.GENDERLESS ? 6 : 0) + (pokemon.fusionSpecies ? 8 : 0) + (pokemon.isShiny() ? 8 : 0) + (Math.min(pokemon.level.toString().length, 3) - 3) * 8)) {
       displayName = `${displayName.slice(0, displayName.endsWith(".") ? -2 : -1).trimEnd()}.`;
       nameSizeTest.setText(displayName);
       nameTextWidth = nameSizeTest.displayWidth;
diff --git a/src/ui/party-ui-handler.ts b/src/ui/party-ui-handler.ts
index 9bb8162ce2a..6c3dfda2141 100644
--- a/src/ui/party-ui-handler.ts
+++ b/src/ui/party-ui-handler.ts
@@ -117,14 +117,14 @@ export default class PartyUiHandler extends MessageUiHandler {
 
   public static FilterNonFainted = (pokemon: PlayerPokemon) => {
     if (pokemon.isFainted()) {
-      return i18next.t("partyUiHandler:noEnergy", { pokemonName: getPokemonNameWithAffix(pokemon) });
+      return i18next.t("partyUiHandler:noEnergy", { pokemonName: getPokemonNameWithAffix(pokemon, false) });
     }
     return null;
   };
 
   public static FilterFainted = (pokemon: PlayerPokemon) => {
     if (!pokemon.isFainted()) {
-      return i18next.t("partyUiHandler:hasEnergy", { pokemonName: getPokemonNameWithAffix(pokemon) });
+      return i18next.t("partyUiHandler:hasEnergy", { pokemonName: getPokemonNameWithAffix(pokemon, false) });
     }
     return null;
   };
@@ -138,7 +138,7 @@ export default class PartyUiHandler extends MessageUiHandler {
     const challengeAllowed = new Utils.BooleanHolder(true);
     applyChallenges(this.scene.gameMode, ChallengeType.POKEMON_IN_BATTLE, pokemon, challengeAllowed);
     if (!challengeAllowed.value) {
-      return i18next.t("partyUiHandler:cantBeUsed", { pokemonName: getPokemonNameWithAffix(pokemon) });
+      return i18next.t("partyUiHandler:cantBeUsed", { pokemonName: getPokemonNameWithAffix(pokemon, false) });
     }
     return null;
   };
@@ -148,7 +148,7 @@ export default class PartyUiHandler extends MessageUiHandler {
   public static FilterItemMaxStacks = (pokemon: PlayerPokemon, modifier: PokemonHeldItemModifier) => {
     const matchingModifier = pokemon.scene.findModifier(m => m instanceof PokemonHeldItemModifier && m.pokemonId === pokemon.id && m.matchType(modifier)) as PokemonHeldItemModifier;
     if (matchingModifier && matchingModifier.stackCount === matchingModifier.getMaxStackCount(pokemon.scene)) {
-      return i18next.t("partyUiHandler:tooManyItems", { pokemonName: getPokemonNameWithAffix(pokemon) });
+      return i18next.t("partyUiHandler:tooManyItems", { pokemonName: getPokemonNameWithAffix(pokemon, false) });
     }
     return null;
   };
@@ -380,18 +380,18 @@ export default class PartyUiHandler extends MessageUiHandler {
           this.clearOptions();
           ui.playSelect();
           pokemon.pauseEvolutions = false;
-          this.showText(i18next.t("partyUiHandler:unpausedEvolutions", { pokemonName: getPokemonNameWithAffix(pokemon) }), null, () => this.showText(null, 0), null, true);
+          this.showText(i18next.t("partyUiHandler:unpausedEvolutions", { pokemonName: getPokemonNameWithAffix(pokemon, false) }), null, () => this.showText(null, 0), null, true);
         } else if (option === PartyOption.UNSPLICE) {
           this.clearOptions();
           ui.playSelect();
-          this.showText(i18next.t("partyUiHandler:unspliceConfirmation", { fusionName: pokemon.fusionSpecies.name, pokemonName: pokemon.name }), null, () => {
+          this.showText(i18next.t("partyUiHandler:unspliceConfirmation", { fusionName: pokemon.fusionSpecies.name, pokemonName: pokemon.getName() }), null, () => {
             ui.setModeWithoutClear(Mode.CONFIRM, () => {
-              const fusionName = pokemon.name;
+              const fusionName = pokemon.getName(false);
               pokemon.unfuse().then(() => {
                 this.clearPartySlots();
                 this.populatePartySlots();
                 ui.setMode(Mode.PARTY);
-                this.showText(i18next.t("partyUiHandler:wasReverted", { fusionName: fusionName, pokemonName: pokemon.name }), null, () => {
+                this.showText(i18next.t("partyUiHandler:wasReverted", { fusionName: fusionName, pokemonName: pokemon.getName() }), null, () => {
                   ui.setMode(Mode.PARTY);
                   this.showText(null, 0);
                 }, null, true);
@@ -405,7 +405,7 @@ export default class PartyUiHandler extends MessageUiHandler {
           this.clearOptions();
           ui.playSelect();
           if (this.cursor >= this.scene.currentBattle.getBattlerCount() || !pokemon.isAllowedInBattle()) {
-            this.showText(i18next.t("partyUiHandler:releaseConfirmation", { pokemonName: getPokemonNameWithAffix(pokemon) }), null, () => {
+            this.showText(i18next.t("partyUiHandler:releaseConfirmation", { pokemonName: getPokemonNameWithAffix(pokemon, false) }), null, () => {
               ui.setModeWithoutClear(Mode.CONFIRM, () => {
                 ui.setMode(Mode.PARTY);
                 this.doRelease(this.cursor);
@@ -950,7 +950,7 @@ export default class PartyUiHandler extends MessageUiHandler {
   }
 
   doRelease(slotIndex: integer): void {
-    this.showText(this.getReleaseMessage(getPokemonNameWithAffix(this.scene.getParty()[slotIndex])), null, () => {
+    this.showText(this.getReleaseMessage(getPokemonNameWithAffix(this.scene.getParty()[slotIndex], false)), null, () => {
       this.clearPartySlots();
       this.scene.removePartyMemberModifiers(slotIndex);
       const releasedPokemon = this.scene.getParty().splice(slotIndex, 1)[0];
@@ -1081,7 +1081,7 @@ class PartySlot extends Phaser.GameObjects.Container {
     const slotInfoContainer = this.scene.add.container(0, 0);
     this.add(slotInfoContainer);
 
-    let displayName = this.pokemon.getNameToRender();
+    let displayName = this.pokemon.getNameToRender(false);
     let nameTextWidth: number;
 
     const nameSizeTest = addTextObject(this.scene, 0, 0, displayName, TextStyle.PARTY);
@@ -1148,12 +1148,12 @@ class PartySlot extends Phaser.GameObjects.Container {
     }
 
     if (this.pokemon.isShiny()) {
-      const doubleShiny = this.pokemon.isFusion() && this.pokemon.shiny && this.pokemon.fusionShiny;
+      const doubleShiny = this.pokemon.isDoubleShiny(false);
 
       const shinyStar = this.scene.add.image(0, 0, `shiny_star_small${doubleShiny ? "_1" : ""}`);
       shinyStar.setOrigin(0, 0);
       shinyStar.setPositionRelative(slotName, -9, 3);
-      shinyStar.setTint(getVariantTint(!doubleShiny ? this.pokemon.getVariant() : this.pokemon.variant));
+      shinyStar.setTint(getVariantTint(this.pokemon.getBaseVariant(doubleShiny)));
 
       slotInfoContainer.add(shinyStar);
 
@@ -1161,7 +1161,7 @@ class PartySlot extends Phaser.GameObjects.Container {
         const fusionShinyStar = this.scene.add.image(0, 0, "shiny_star_small_2");
         fusionShinyStar.setOrigin(0, 0);
         fusionShinyStar.setPosition(shinyStar.x, shinyStar.y);
-        fusionShinyStar.setTint(getVariantTint(this.pokemon.fusionVariant));
+        fusionShinyStar.setTint(getVariantTint(this.pokemon.illusion.fusionVariant ?? this.pokemon.fusionVariant));
 
         slotInfoContainer.add(fusionShinyStar);
       }
diff --git a/src/ui/rename-form-ui-handler.ts b/src/ui/rename-form-ui-handler.ts
index 35127564b60..2c229442ed1 100644
--- a/src/ui/rename-form-ui-handler.ts
+++ b/src/ui/rename-form-ui-handler.ts
@@ -36,7 +36,7 @@ export default class RenameFormUiHandler extends FormModalUiHandler {
   show(args: any[]): boolean {
     if (super.show(args)) {
       const config = args[0] as ModalConfig;
-      this.inputs[0].text = (args[1] as PlayerPokemon).getNameToRender();
+      this.inputs[0].text = (args[1] as PlayerPokemon).getNameToRender(false);
 
       this.submitAction = (_) => {
         this.sanitizeInputs();
diff --git a/src/ui/summary-ui-handler.ts b/src/ui/summary-ui-handler.ts
index 405429fcd3f..8c45d767ae0 100644
--- a/src/ui/summary-ui-handler.ts
+++ b/src/ui/summary-ui-handler.ts
@@ -301,8 +301,8 @@ export default class SummaryUiHandler extends UiHandler {
     this.pokemonSprite.setPipelineData("teraColor", getTypeRgb(this.pokemon.getTeraType()));
     this.pokemonSprite.setPipelineData("ignoreTimeTint", true);
     this.pokemonSprite.setPipelineData("spriteKey", this.pokemon.getSpriteKey());
-    this.pokemonSprite.setPipelineData("shiny", this.pokemon.shiny);
-    this.pokemonSprite.setPipelineData("variant", this.pokemon.variant);
+    this.pokemonSprite.setPipelineData("shiny", this.pokemon.illusion.shiny ?? this.pokemon.shiny);
+    this.pokemonSprite.setPipelineData("variant", this.pokemon.illusion.variant ?? this.pokemon.variant);
     [ "spriteColors", "fusionSpriteColors" ].map(k => {
       delete this.pokemonSprite.pipelineData[`${k}Base`];
       if (this.pokemon.summonData?.speciesForm) {
@@ -312,7 +312,7 @@ export default class SummaryUiHandler extends UiHandler {
     });
     this.pokemon.cry();
 
-    this.nameText.setText(this.pokemon.getNameToRender());
+    this.nameText.setText(this.pokemon.getNameToRender(false));
 
     const isFusion = this.pokemon.isFusion();
 
@@ -346,12 +346,12 @@ export default class SummaryUiHandler extends UiHandler {
 
     this.candyShadow.setCrop(0,0,16, candyCropY);
 
-    const doubleShiny = isFusion && this.pokemon.shiny && this.pokemon.fusionShiny;
-    const baseVariant = !doubleShiny ? this.pokemon.getVariant() : this.pokemon.variant;
+    const doubleShiny = this.pokemon.isDoubleShiny(false);
+    const baseVariant = this.pokemon.getBaseVariant(doubleShiny);
 
     this.shinyIcon.setPositionRelative(this.nameText, this.nameText.displayWidth + (this.splicedIcon.visible ? this.splicedIcon.displayWidth + 1 : 0) + 1, 3);
     this.shinyIcon.setTexture(`shiny_star${doubleShiny ? "_1" : ""}`);
-    this.shinyIcon.setVisible(this.pokemon.isShiny());
+    this.shinyIcon.setVisible(this.pokemon.isShiny(false));
     this.shinyIcon.setTint(getVariantTint(baseVariant));
     if (this.shinyIcon.visible) {
       const shinyDescriptor = doubleShiny || baseVariant ?
@@ -364,7 +364,7 @@ export default class SummaryUiHandler extends UiHandler {
     this.fusionShinyIcon.setPosition(this.shinyIcon.x, this.shinyIcon.y);
     this.fusionShinyIcon.setVisible(doubleShiny);
     if (isFusion) {
-      this.fusionShinyIcon.setTint(getVariantTint(this.pokemon.fusionVariant));
+      this.fusionShinyIcon.setTint(getVariantTint(this.pokemon.illusion.fusionVariant ?? this.pokemon.fusionVariant));
     }
 
     this.pokeball.setFrame(getPokeballAtlasKey(this.pokemon.pokeball));
@@ -727,7 +727,7 @@ export default class SummaryUiHandler extends UiHandler {
         return typeIcon;
       };
 
-      const types = this.pokemon.getTypes(false, false, true);
+      const types = this.pokemon.getTypes(false, false, true, false);
       profileContainer.add(getTypeIcon(0, types[0]));
       if (types.length > 1) {
         profileContainer.add(getTypeIcon(1, types[1]));