Gulpin is a round, green, amorphous Pokmon. It has a black diamond marking on its back and a yellow feather-like adornment on its head. A female has a shorter feather than a male. Its face consists of puckered lips and slanted eyes that are usually closed. It has two stubby appendages that are the same shape as its lips. It swallows anything of its own size whole, since its stomach comprises most of its body. Its heart and brain are very small in comparison to its stomach. The unique stomach acid it has allows it to digest almost anything. When it is digesting, vile, overpowering gases are expelled. It lives in grassy areas.