The Groudon EX Pokemon card is a rare collectible from the XY Black Star Promos series, featuring a special EX design and half art illustration. This card, numbered XY42, is highly sought after by Pokémon TCG collectors for its unique rarity and tie-in to the popular XY set. With its iconic Pokémon design and special abilities, the Groudon EX card is a valuable addition to any collection.