Bagon are small, blue, reptilian Pokémon vaguely resembling Pachycephalosaurus. They are bipedal and lack tails. Their heads are as hard as steel, and possess a large, round snout and triangular eyes. The head also sports a crest-like formation of three thick grey ridges that continue as a slope down their back, iguana-like, yellow-colored circular reptilian ears, a yellow jaw and teeth protruding from the mouth. Bagon have stubby arms, a triangular patch of yellow on their underside, and legs which have two toes.