Lairon (Japanese: コドラ Kodora) is a dual-type Steel/Rock Pokémon. It evolves from Aron starting at level 32 and evolves into Aggron starting at level 42.
Lairon has a stocky, armored, quadruped build. Its body is a dark gray and its eyes are sky blue. Its back is covered with segments of iron armor, each with a high ridge and round dark holes on the sides. The sides of Lairon’s lower jaw have several flat protrusions and two teeth are visible in its mouth. There are two pronged metal bands on Lairon's legs. The upper is gray, and the lower is iron-colored.