Can you use Sparkling Cubes on guaranteed eggs?

The item will not stack with innate guarantees, burning its bonuses for no return.

Sparkling cubes cannot be used on guaranteed sparkling eggs. Applying one to an egg that already carries a sparkling guarantee simply consumes the item without improving the outcome. The same loss applies to stats: targeting an egg that already guarantees perfect potential wastes the cube's potential upgrade completely.

This restriction extends across similar consumable items. Using an Ultra Pod or Ultra Cube on Umbral eggs, Alpha Aniimo, or eggs that already guarantee Elite rarity or Perfect potential provides no additional benefit. Applying an Ultra Anipod to an egg that already guarantees Elite potential merely duplicates that guarantee and wastes the pod.

Where to spend Sparkling Cubes

Save Sparkling Cubes for Prismana eggs or established meta picks instead of spending them on routine hatches. Because cubes do not stack bonus potential or duplicate special traits, reserve them strictly for standard eggs where every guaranteed roll provides full value.