Axew is a bipedal, greenish-colored Pokémon with noticeable nostrils and pale tusks protruding from the sides of its mouth. The back of its head, tipped with dark grayish-green coloration, has a horn- or spike-like, pointed and tall protrusion. Axew also has dark grayish-green coloration rimming its eyes, which have red irises. A collar-like, forest-green patterning encircles its neck; most of its body is a dull grayish green. Axew's limbs and tail are small, with its forelimbs having three digits and its feet having two digits.
An Axew's tusks can easily regenerate at a rapid rate when broken, and will regrow if they fall out. Repeated regrowth makes their tusks sharp and strong. As shown in The Dragon Master's Path!, Axew are skilled at climbing walls.