Groudon ex is a Holofoil variant card from the Nintendo Black Star Promos set, designated as card #2. As a Promo rarity card, it holds a notable position among collectors, currently valued at approximately $150.00. The card's unique artwork and status within the Pokémon Trading Card Game contribute to its desirability, making it a significant piece for both players and collectors alike. Its market value reflects the ongoing interest in rare promotional cards.