Re-implement mini black hole item

src/data/pokeball.ts

@@ -55,7 +55,7 @@ export function getPokeballCatchMultiplier(type: PokeballType): number {
     case PokeballType.ULTRA_BALL:
       return 2;
     case PokeballType.MASTER_BALL:
-      return -1;
+      return 10;
     case PokeballType.LUXURY_BALL:
       return 1;
   }