Pupitar are somewhat large Pokémon that are encased inside a thick shell made of grayish-blue rock. They have several spikes and holes for eyes and what appears to be eyebrows, but are actually triangular openings. They appear much like other pupa Pokémon like Metapod and Kakuna, but are far from helpless, as they possess enough power to topple mountains. Since its arms and legs are developing inside the shell, Pupitar are capable of venting gas to propel themselves around.