Gastrodon East Sea is a holographic Stage 1 Water-type Pokémon trading card from the 2007 Pokémon TCG Diamond & Pearl – Secret Wonders expansion. The card’s artwork by Kazuyuki Kano portrays Gastrodon’s unique blue-and-yellow East Sea form in a starry underwater scene, enhanced by shimmering holo foil. Gastrodon East Sea also features the Osmotic Pressure Poké-Power and Dwindling Wave attack, reflecting its role as a resilient water slug from Sinnoh. As a Secret Wonders rare, this card appeals to players and collectors for its nostalgic Gen IV era art and alternate-form design.