Gastrodon

Gastrodon is one of the fictional species of Pokémon from the "Pokémon" media franchise owned by Nintendo and Game Freak.
It is a Water/Ground Pokémon from the fifth generation of games; Diamond, Pearl and Platinum. It has two forms, named east sea and west sea. Whilst they are the same statistically, they have completely different designs. Their pre-evolution, Shellos, also has varying forms.