The top-half of Registeel's body is spherical and gray with a black stripe running down its "face". Its face consists of seven red dots in a hexagonal formation. It has black arms with three fingers each and cylindrical legs. While Registeel has been classified as a Steel-type Pokémon, its body is actually made of a material that is harder than any known metal. However, this material stretches and shrinks despite its hardness. Its body was tempered by pressure underground over thousands of years.