Aipom appear to be similar to purple monkeys, with beige colour on their faces, ear insides, belly, feet and tails. Their faces have round eyes and a constantly cheeky smile. Along their heads are large, oval-shaped ears and a cowlick. An Aipom's arms are completely purple with no actual paws nor fingers present, while they do have visible feet instead.

The most famous feature of this arboreal Pokémon is the three-fingered hand on the end of its tail. It uses its tail for many purposes, such as grappling onto tree branches, picking fruit and manipulating objects. It even uses its tail in most of its attacks. It uses its tail so much that its real arms aren't as dexterous as a result.