Avalugg is a large quadrupedal Pokémon resembling a tortoise made of ice. Its triangular head is small, with yellow eyes and tusk-like growths on the sides of its mouth, while its broad flat shell is diamond-shaped and lined with purple horizontal gouges. Its four stubby feet have three claws each and are lined with purple markings too.
A slow but immensely powerful Pokémon Avalugg is capable of crushing any obstacle that stands in its way. It is often seen carrying groups of Bergmite on its back in a manner similar to an aircraft carrier.