As part of its ongoing efforts to promote every single Pokémon out there, The Pokémon Company has shared special content dedicated to Oshawott:
Oshawott: The scalchop on its stomach isn’t just used for battle—it can be used to break open hard berries as well. It fights using the scalchop on its stomach. In response to an attack, it retaliates immediately by slashing.
Source: The Pokémon Company