Gulpin

Gulpin (ゴクリン, Gokurin, Gokulin in original Japanese language versions) is a Pokémon that appears as a Poké Ball Pokémon in Super Smash Bros. Brawl. It eats a close opponent and inflicts major damage before spitting them out. If no opponents are around, it will remain sitting until one comes within its range.

Creature Description
Gulpin first became available in Pokémon Ruby and Sapphire. It is No#316 and is Poison-typd It is a green gas bag with pursed lips, slitted eyes and puffy hands. It also mounts a yellow 'feather' on its crest. Virtually, its whole body is its stomach. It can easily swallow anything its size, and more. It's stomach contains a special fluid and enzyme that dissolves anything, even scrap iron. Whilst digesting, vile, overpowering gases are expelled. It can evolve into Swallot, a bigger purple version of Gulpin, at level 26.

As a Poké Ball Pokémon
Gulpin appears as a Poké Ball Pokemon for the first time since the debut in Pokemon Ruby and Sapphire. When summoned, Gulpin will stay where summoned. If an opponent should come within range of Gulpin, it will open its mouth wide and swallow them. They will receive damage according to the amount they are contained in it. They will be abruptly spat out in a few seconds. The attack cannot harm the user.