The 2021 Pokemon Celebrations Greninja Gold Star SWSH144 Black Star Promo is a special edition collectible card featuring an amphibian species called Greninja. This English-language card is part of the Pokémon franchise and is manufactured by The Pokémon Company in the United States. The card is from the Set Celebrations and is a Basic stage Pokémon card with a holo finish, making it a sought-after item for collectors and fans of the Pokémon Trading Card Game.