Aipom is a monkey-like Pokémon with a three-fingered hand at the end of its tail. Its fur is purple, while the skin of its face, inner ears, belly, feet, and the tip of its tail is beige. On its face are a usually cheeky smile and round, blue eyes. Supplemented by its round ears, Aipom's head is disproportionately large compared to its body. Atop its head is a cowlick that is longer on females than males. Unlike its feet, Aipom's arms are simple, purple stubs.
Aipom uses its powerful tail freely and cleverly for many purposes. The tail is strong enough to anchor Aipom to a branch and suspend the rest of its body in the air, but also delicate enough to pick fruit and manipulate objects. Aipom has been known to wrap its tail around tree branches as it sleeps so it does not fall. Since Aipom uses its tail so much, its actual arms are not as dexterous. Aipom lives high in the treetops, using its tail for balance as it swings from branch to branch.
In Pokémon Adventures, Gold has an Aipom named Aibo which first appeared in Murkrow Row, one of the Pokémon he grew up with at his house in New Bark Town. Because it was not very powerful, it was typically used in situations that needed its dexterity or for distracting opponents with Double Team. In the battle against the Masked Man, it showed its worth by having Sudobo inherit the speed boost of its Agility to restrain the villain. It was also very skilled with pulling fast ones or using Gold's equipment to send out multiple Pokémon at once, as displayed when it spun Gold's billiard cue around to power up Exbo's Blast Burn attack.
Clemont uses a gadget based on Aipom's tail, called the Aipom arm.
Aipom appears to be based on a monkey and the exaggerated concept of a prehensile tail. It may be specifically based on the squirrel monkey, which is similar in appearance. Aipom also shares its large smile with a cymbal-banging monkey toy. It is also similar to an ahuizotl, a creature of Aztec mythology with monkey hands and a fifth human hand on its tail.
Aipom and Eipam may be a combination of ape and palm (referring to the hand on its tail). It may also refer to a pom-pom.