Bucky's Caterpie is a normal-type Pokémon owned by Bucky.
Bucky searched for a Dunsparce, since the children in his town had one but him. He found one, but the Dunsparce quickly escaped, then was blasted off by Team Rocket. However, once the heroes found Team Rocket and defeated them, Dunsparce appeared once more, so Bucky had Caterpie fight it. Once Dunsparce was wrapped in String Shot, Bucky caught it and used it for a small tournament in the park.