Lairon has a stocky, armored, quadruped build like Rhyhorn. Its body is a dark grey 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.