Oshawott was a human, who, one day, woke up as a Pokémon. A portal was created and Oshawott fell from the sky. Pikachu found Oshawott, who woke up and accidentally bashed his head onto Pikachu's. Despite the odd meeting, Pikachu showed Oshawott a land where a new village could prosper, where they could return from adventures.
Eventually, Oshawott went into exploration of a cave with Pikachu and encountered a bunch of Pokémon, who proceeded to attack Oshawott. They survived and came back to the village, where Umbreon and Espeon opened a Magnet Gate. Along with Virizion, Dunsparce, Umbreon, Espeon and Pikachu, Oshawott went through the gate and found himself in an icy chamber. However, the temperature was too low for the team, as everyone but Oshawott fell down, unconscious. Oshawott, however, encountered Kyurem, the guardian of the chamber
None of Oshawott's moves are known.
- ^ Pokémon Mystery Dungeon Gates to Infinity Animated Trailer (Part 1), Oshawott has a male voice