Replace .ogg with .m4a for iOS support

src/data/pokemon-species.ts

@@ -306,7 +306,7 @@ export abstract class PokemonSpeciesForm {
   loadAssets(scene: BattleScene, female: boolean, formIndex?: integer, shiny?: boolean, startLoad?: boolean): Promise<void> {
     return new Promise(resolve => {
       const spriteKey = this.getSpriteKey(female, formIndex, shiny);
-      scene.load.audio(this.getCryKey(formIndex), `audio/cry/${this.getCryKey(formIndex)}.ogg`);
+      scene.load.audio(this.getCryKey(formIndex), `audio/cry/${this.getCryKey(formIndex)}.m4a`);
       scene.loadPokemonAtlas(spriteKey, this.getSpriteAtlasPath(female, formIndex, shiny));
       scene.load.once(Phaser.Loader.Events.COMPLETE, () => {
         const originalWarn = console.warn;