From Bulbapedia, the community-driven Pokémon encyclopedia.
Oshawott has been featured on 8 different cards since it debuted as one of the BW Black Star Promos of the Pokémon Trading Card Game. Oshawott cards are normally Water-type Basic Pokémon. In Japan, Oshawott was featured in the Oshawott Collection Sheet of the Journey Partners collection released in September 2010.
List of Pokémon cards featuring Oshawott