Dawn is trapped in the Solaceon Ruins surrounded by Unown, which was angered by the work of Team Galactic. When Dawn is in trouble, Aipom attempted to help her, but to no avail. Then Aipom started to evolve into an Ambipom and saved Dawn from the Unown.
Dawn uses Ambipom's Swift in contest by surrounding it with stars on the first round for the first time, but failed to enter the second round as Ambipom is completely hidden in the cluster of stars.
Dawn uses Ambipom also for the game of Pokémon Ping Pong. In the game, Ambipom shows excellent skills by hitting the ball again and again, and making it to fire up by the ignited launch. Due to this talent, the O, the master of the game took her for training.
Its name is a cross between ambidextrous, meaning to have equal proficiency in both the left and right hand, and what could be the second word is palm.
The same reason can be of its pre-evolution, Aipom, but with "bi" meaning two, because it has two tail-hands as oppose to one.
Its Japanese name comprises te (手), meaning hand, and the transliteration of both implies that it is two handed.