Aron has a round body, four stubby legs, and a large, round head. Its body is dark grey and its eyes are a pale blue. Portions of steel armour cover its head, legs, and back, which has a single spike on it. Throughout Aron's body are small openings in the armor, three on its head, one, the largest, being the opening for its eye, and one on its back below its spike. A new suit of armour is made when it evolves. The old, discarded armour is salvaged as metal for making iron products.