Ash-Greninja-EX is a Holofoil variant card from the XY Black Star Promos set, designated as #XY133. With a Promo rarity, it features the popular Water/Dark-type Pokémon, which gained prominence in the competitive scene following its debut in the anime. Currently valued at $58.79, this card appeals to both collectors and players alike, reflecting its significance in the Pokémon trading card market. Grading can influence its price, making well-preserved copies particularly sought after.