Gulpin

Gulpin is an Poison-type Pokémon that first appeared in Pokémon Ruby and Sapphire. Starting from level 36, it evolves into Swalot. In Super Smash Bros. Brawl, it can be spawned from a Poké Ball and attacks by swallowing opponents; anyone that comes in range of Gulpin gets swallowed into its mouth, dealing damage over time to them. Others can damage whoever is swallowed, and after a short time, they will be spat out.