diff --git a/src/field/pokemon.ts b/src/field/pokemon.ts
index 5983871654b..f4ac1801861 100644
--- a/src/field/pokemon.ts
+++ b/src/field/pokemon.ts
@@ -281,8 +281,8 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
 
 
   getNameToRender(useIllusion: boolean = true) {
-    const name: string = (!useIllusion && this.battleData.illusion.active) ? this.battleData.illusion.name! : this.name;
-    const nickname: string = (!useIllusion && this.battleData.illusion.active) ? this.battleData.illusion.nickname! : this.nickname;
+    const name: string = (!useIllusion && this.battleData?.illusion.active) ? this.battleData?.illusion.name! : this.name;
+    const nickname: string = (!useIllusion && this.battleData?.illusion.active) ? this.battleData?.illusion.nickname! : this.nickname;
     try {
       if (nickname) {
         return decodeURIComponent(escape(atob(nickname)));
@@ -400,7 +400,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       const lastPokemon: Pokemon = party.filter(p => p !== this).at(-1) || this;
       const speciesId = lastPokemon.species.speciesId;
 
-      if ( lastPokemon === this || this.battleData.illusion.active ||
+      if ( lastPokemon === this || this.battleData?.illusion.active ||
         ((speciesId === Species.OGERPON || speciesId === Species.TERAPAGOS) && (lastPokemon.isTerastallized() || this.isTerastallized()))) {
         return false;
       }
@@ -478,12 +478,12 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       return false;
     }
 
-    this.name = this.battleData.illusion.name!;
-    this.nickname = this.battleData.illusion.nickname!;
-    this.shiny = this.battleData.illusion.shiny!;
-    this.variant = this.battleData.illusion.variant!;
-    this.fusionVariant = this.battleData.illusion.fusionVariant!;
-    this.fusionShiny = this.battleData.illusion.fusionShiny!;
+    this.name = this.battleData?.illusion.name!;
+    this.nickname = this.battleData?.illusion.nickname!;
+    this.shiny = this.battleData?.illusion.shiny!;
+    this.variant = this.battleData?.illusion.variant!;
+    this.fusionVariant = this.battleData?.illusion.fusionVariant!;
+    this.fusionShiny = this.battleData?.illusion.fusionShiny!;
     this.battleData.illusion = { active: false, available: false };
     if (this.isOnField()) {
       this.scene.playSound("PRSFX- Transform");
@@ -513,15 +513,15 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       Promise.allSettled(moveIds.map(m => initMoveAnim(this.scene, m)))
         .then(() => {
           loadMoveAnimAssets(this.scene, moveIds);
-          const formIndex = this.battleData.illusion.active && useIllusion ? this.battleData.illusion.formIndex : this.formIndex;
+          const formIndex = this.battleData?.illusion.active && useIllusion ? this.battleData?.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(false, useIllusion)) {
-            const fusionFormIndex = this.battleData.illusion.active && useIllusion ? this.battleData.illusion.fusionFormIndex : this.fusionFormIndex;
-            const fusionShiny = this.battleData.illusion.active && !useIllusion ? this.battleData.illusion.fusionShiny : this.fusionShiny;
-            const fusionVariant = this.battleData.illusion.active && !useIllusion ? this.battleData.illusion.fusionVariant : this.fusionVariant;
+            const fusionFormIndex = this.battleData?.illusion.active && useIllusion ? this.battleData?.illusion.fusionFormIndex : this.fusionFormIndex;
+            const fusionShiny = this.battleData?.illusion.active && !useIllusion ? this.battleData?.illusion.fusionShiny : this.fusionShiny;
+            const fusionVariant = this.battleData?.illusion.active && !useIllusion ? this.battleData?.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));
           }
@@ -622,7 +622,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   }
 
   getSpriteId(ignoreOverride?: boolean): string {
-    const formIndex: integer = this.battleData.illusion.active ?  this.battleData.illusion.formIndex! : this.formIndex;
+    const formIndex: integer = this.battleData?.illusion.active ?  this.battleData?.illusion.formIndex! : this.formIndex;
     return this.getSpeciesForm(ignoreOverride, true).getSpriteId(this.getGender(ignoreOverride, true) === Gender.FEMALE, formIndex, this.shiny, this.variant);
   }
 
@@ -631,7 +631,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       back = this.isPlayer();
     }
 
-    const formIndex: integer = this.battleData.illusion.active ?  this.battleData.illusion.formIndex! : this.formIndex;
+    const formIndex: integer = this.battleData?.illusion.active ?  this.battleData?.illusion.formIndex! : this.formIndex;
 
     return this.getSpeciesForm(ignoreOverride, true).getSpriteId(this.getGender(ignoreOverride, true) === Gender.FEMALE, formIndex, this.shiny, this.variant, back);
   }
@@ -640,8 +640,8 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     return this.getSpeciesForm(ignoreOverride, false).getSpriteKey(
       this.getGender(ignoreOverride) === Gender.FEMALE,
       this.formIndex,
-      this.battleData.illusion.shiny ?? this.shiny,
-      this.battleData.illusion.variant ?? this.variant
+      this.battleData?.illusion.shiny ?? this.shiny,
+      this.battleData?.illusion.variant ?? this.variant
     );
   }
 
@@ -650,7 +650,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   }
 
   getFusionSpriteId(ignoreOverride?: boolean): string {
-    const fusionFormIndex: integer = this.battleData.illusion.active ?  this.battleData.illusion.fusionFormIndex! : this.fusionFormIndex;
+    const fusionFormIndex: integer = this.battleData?.illusion.active ?  this.battleData?.illusion.fusionFormIndex! : this.fusionFormIndex;
     return this.getFusionSpeciesForm(ignoreOverride, true).getSpriteId(this.getFusionGender(ignoreOverride, true) === Gender.FEMALE, fusionFormIndex, this.fusionShiny, this.fusionVariant);
   }
 
@@ -659,7 +659,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       back = this.isPlayer();
     }
 
-    const fusionFormIndex: integer = this.battleData.illusion.active ?  this.battleData.illusion.fusionFormIndex! : this.fusionFormIndex;
+    const fusionFormIndex: integer = this.battleData?.illusion.active ?  this.battleData?.illusion.fusionFormIndex! : this.fusionFormIndex;
 
     return this.getFusionSpeciesForm(ignoreOverride, true).getSpriteId(this.getFusionGender(ignoreOverride, true) === Gender.FEMALE, fusionFormIndex, this.fusionShiny, this.fusionVariant, back);
   }
@@ -673,7 +673,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   }
 
   getIconAtlasKey(ignoreOverride?: boolean): string {
-    const formIndex: integer = this.battleData.illusion.active ?  this.battleData.illusion.formIndex! : this.formIndex;
+    const formIndex: integer = this.battleData?.illusion.active ?  this.battleData?.illusion.formIndex! : this.formIndex;
     return this.getSpeciesForm(ignoreOverride, true).getIconAtlasKey(formIndex, this.shiny, this.variant);
   }
 
@@ -682,12 +682,12 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   }
 
   getIconId(ignoreOverride?: boolean): string {
-    const formIndex: integer = this.battleData.illusion.active ?  this.battleData.illusion.formIndex! : this.formIndex;
+    const formIndex: integer = this.battleData?.illusion.active ?  this.battleData?.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 {
-    const fusionFormIndex: integer = this.battleData.illusion.active ?  this.battleData.illusion.fusionFormIndex! : this.fusionFormIndex;
+    const fusionFormIndex: integer = this.battleData?.illusion.active ?  this.battleData?.illusion.fusionFormIndex! : this.fusionFormIndex;
     return this.getFusionSpeciesForm(ignoreOverride, true).getIconId(this.getFusionGender(ignoreOverride, true) === Gender.FEMALE, fusionFormIndex, this.fusionShiny, this.fusionVariant);
   }
 
@@ -695,9 +695,9 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
    * @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.battleData.illusion.active ? this.battleData.illusion.species! : this.species;
+    const species: PokemonSpecies = useIllusion && this.battleData?.illusion.active ? this.battleData?.illusion.species! : this.species;
 
-    const formIndex: integer = useIllusion && this.battleData.illusion.active ? this.battleData.illusion.formIndex! : this.formIndex;
+    const formIndex: integer = useIllusion && this.battleData?.illusion.active ? this.battleData?.illusion.formIndex! : this.formIndex;
 
     if (!ignoreOverride && this.summonData?.speciesForm) {
       return this.summonData.speciesForm;
@@ -713,8 +713,8 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
    * @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.battleData.illusion.active ? this.battleData.illusion.fusionSpecies! : this.fusionSpecies!;
-    const fusionFormIndex: integer = useIllusion && this.battleData.illusion.active ? this.battleData.illusion.fusionFormIndex! : this.fusionFormIndex;
+    const fusionSpecies: PokemonSpecies = useIllusion && this.battleData?.illusion.active ? this.battleData?.illusion.fusionSpecies! : this.fusionSpecies!;
+    const fusionFormIndex: integer = useIllusion && this.battleData?.illusion.active ? this.battleData?.illusion.fusionFormIndex! : this.fusionFormIndex;
 
     if (!ignoreOverride && this.summonData?.speciesForm) {
       return this.summonData.fusionSpeciesForm;
@@ -1210,8 +1210,8 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
    * @param {boolean} useIllusion - Whether we want the gender of the illusion or not.
    */
   getGender(ignoreOverride?: boolean, useIllusion: boolean = false): Gender {
-    if (useIllusion && this.battleData.illusion.active) {
-      return this.battleData.illusion.gender!;
+    if (useIllusion && this.battleData?.illusion.active) {
+      return this.battleData?.illusion.gender!;
     } else if (!ignoreOverride && this.summonData?.gender !== undefined) {
       return this.summonData.gender;
     }
@@ -1222,8 +1222,8 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
    * @param {boolean} useIllusion - Whether we want the fusionGender of the illusion or not.
    */
   getFusionGender(ignoreOverride?: boolean, useIllusion: boolean = false): Gender {
-    if (useIllusion && this.battleData.illusion.active) {
-      return this.battleData.illusion.fusionGender!;
+    if (useIllusion && this.battleData?.illusion.active) {
+      return this.battleData?.illusion.fusionGender!;
     } else if (!ignoreOverride && this.summonData?.fusionGender !== undefined) {
       return this.summonData.fusionGender;
     }
@@ -1231,24 +1231,24 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   }
 
   isShiny(useIllusion: boolean = false): boolean {
-    if (!useIllusion && this.battleData.illusion.active) {
-      return this.battleData.illusion.shiny || (!!this.battleData.illusion.fusionSpecies && this.battleData.illusion.fusionShiny) || false;
+    if (!useIllusion && this.battleData?.illusion.active) {
+      return this.battleData?.illusion.shiny || (!!this.battleData?.illusion.fusionSpecies && this.battleData?.illusion.fusionShiny) || false;
     } else {
       return this.shiny || (this.isFusion(useIllusion) && this.fusionShiny);
     }
   }
 
   isDoubleShiny(useIllusion: boolean = false): boolean {
-    if (!useIllusion && this.battleData.illusion.active) {
-      return this.isFusion(false) && this.battleData.illusion.shiny! && this.battleData.illusion.fusionShiny!;
+    if (!useIllusion && this.battleData?.illusion.active) {
+      return this.isFusion(false) && this.battleData?.illusion.shiny! && this.battleData?.illusion.fusionShiny!;
     } else {
       return this.isFusion(useIllusion) && this.shiny && this.fusionShiny;
     }
   }
 
   getVariant(useIllusion: boolean = false): Variant {
-    if (!useIllusion && this.battleData.illusion.active) {
-      return !this.isFusion(false) ? this.battleData.illusion.variant! : Math.max(this.variant, this.fusionVariant) as Variant;
+    if (!useIllusion && this.battleData?.illusion.active) {
+      return !this.isFusion(false) ? this.battleData?.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;
     }
@@ -1257,7 +1257,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
 
   getBaseVariant(doubleShiny: boolean): Variant {
     if (doubleShiny) {
-      return this.battleData.illusion.active ? this.battleData.illusion.variant! : this.variant;
+      return this.battleData?.illusion.active ? this.battleData?.illusion.variant! : this.variant;
     } else {
       return this.getVariant();
     }
@@ -1268,15 +1268,15 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   }
 
   isFusion(useIllusion: boolean = false): boolean {
-    if (useIllusion && this.battleData.illusion.active) {
-      return !!this.battleData.illusion.fusionSpecies;
+    if (useIllusion && this.battleData?.illusion.active) {
+      return !!this.battleData?.illusion.fusionSpecies;
     } else {
       return !!this.fusionSpecies;
     }
   }
 
   getName(illusion: boolean = false): string {
-    return (!illusion && this.battleData.illusion.active && this.battleData.illusion.name) ? this.battleData.illusion.name : this.name;
+    return (!illusion && this.battleData?.illusion.active && this.battleData?.illusion.name) ? this.battleData?.illusion.name : this.name;
   }
 
   /**
@@ -1380,7 +1380,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       if (this.mysteryEncounterPokemonData.types && this.mysteryEncounterPokemonData.types.length > 0) {
         // "Permanent" override for a Pokemon's normal types, currently only used by Mystery Encounters
         this.mysteryEncounterPokemonData.types.forEach(t => types.push(t));
-      } else if (!ignoreOverride && this.summonData?.types && this.summonData.types.length > 0 && (!this.battleData.illusion.active || !doIllusion)) {
+      } else if (!ignoreOverride && this.summonData?.types && this.summonData.types.length > 0 && (!this.battleData?.illusion.active || !doIllusion)) {
         this.summonData.types.forEach(t => types.push(t));
       } else if (this.mysteryEncounterPokemonData.types && this.mysteryEncounterPokemonData.types.length > 0) {
         // "Permanent" override for a Pokemon's normal types, currently only used by Mystery Encounters