Fix crash with certain animated variant sprites

src/field/pokemon.ts

@@ -312,12 +312,13 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
                   const battleSpritePath = this.getBattleSpriteAtlasPath(back, ignoreOverride).replace('variant/', '').replace(/_[1-3]$/, '');
                   let variantSet: VariantSet;
                   let config = variantData;
+                  const useExpSprite = this.scene.experimentalSprites && this.scene.hasExpSprite(this.getBattleSpriteKey(back, ignoreOverride));
                   battleSpritePath.split('/').map(p => config ? config = config[p] : null);
                   variantSet = config as VariantSet;
                   if (variantSet && variantSet[this.variant] === 1) {
                     if (variantColorCache.hasOwnProperty(key))
                       return resolve();
-                    this.scene.cachedFetch(`./images/pokemon/variant/${battleSpritePath}.json`).then(res => res.json()).then(c => {
+                    this.scene.cachedFetch(`./images/pokemon/variant/${useExpSprite ? 'exp/' : ''}${battleSpritePath}.json`).then(res => res.json()).then(c => {
                       variantColorCache[key] = c;
                       resolve();
                     });