Pokemon #650 in the National PokéDex, a Grass-type Pokémon.
Chespin is a bipedal, mammalian Pokémon. It has a light brown front with dark brown arms and three triangular markings on its face. There is a tough, green shell covering its back, which extends from its head to halfway down its tail. There is a small, off-center hole in the shell on the back of Chespin's head. The shell can protect Chespin from powerful attacks. Around the face, the shell has four leaf-like spikes, and one split into three parts on the back of its head. Chespin's oval eyes are brown, and it has a triangular red nose and rodent-like incisors. Its arms have three fingers, while its feet have two long claws. The visible part of its tapered tail is orange.
Its Japanese name, Harimaron, suggests it is based, in part, on hedgehogs, making it the first mammalian Grass-type starter Pokémon.
Japanese Name: Harimaron