[Bug] Fixing crash that happens when failing to load experimental spr…

…ites.

src/field/pokemon.ts

@@ -436,18 +436,33 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
                     if (variantColorCache.hasOwnProperty(key)) {
                       return resolve();
                     }
-                    this.scene.cachedFetch(`./images/pokemon/variant/${useExpSprite ? "exp/" : ""}${battleSpritePath}.json`).
-                      then(res => {
+                    const getSpritePath = (isExpSprite: boolean): string => {
+                      return `./images/pokemon/variant/${isExpSprite ? "exp/" : ""}${battleSpritePath}.json`;
+                    };
+                    const handleError = (spritePath: string, isExpSprite: boolean, ...optionalParams: any[]) => {
+                      console.warn(`Could not load ${spritePath}!`, ...optionalParams);
+                      if (isExpSprite) {
+                        // If failed to load experimental sprites, fall back on non-experimental before giving up
+                        attemptProcessVariant(false);
+                      }
+                      return;
+                    };
+                    const attemptProcessVariant = (isExpSprite: boolean) => {
+                      const spritePath = getSpritePath(useExpSprite);
+                      this.scene.cachedFetch(spritePath).then(res => {
                         // Prevent the JSON from processing if it failed to load
                         if (!res.ok) {
-                          console.error(`Could not load ${res.url}!`);
-                          return;
+                          handleError(res.url, isExpSprite);
                         }
                         return res.json();
+                      }).catch(error => {
+                        handleError(spritePath, isExpSprite, error);
                       }).then(c => {
                         variantColorCache[key] = c;
                         resolve();
                       });
+                    };
+                    attemptProcessVariant(useExpSprite);
                   } else {
                     resolve();
                   }