This Ultra Beast is well enough liked to be chosen as a first partner in its own world.
– Pokémon Ultra Sun Pokédex
Poipole is one of the new Ultra Beasts introduced in Ultra Sun/Moon. In fact, it’s the first one you see. You get it as a gift from the Ultra Recon Squad. Its code name is UB Adhesive. It’s the only Ultra Beast that can evolve, and as such, has the lowest stats of the Ultra Beasts.
In the anime, a Poipole wandered into Ash’s world and was caught by Ash. It stuck around for an whole arc, but eventually left. It liked to draw with the nozzle thing on top of its head.
Stat-wise, its stats alternate between 73 (Attack, Sp Attack, Speed) and 67 (HP, Defense, Sp Defense).