It is one of the Ultra Beasts and is known by the code name UB Adhesive (Japanese: ＵＢ：ＳＴＩＣＫＹUB: Sticky).
Poipole is a small, purple Ultra Beast. It has a bipedal build with a large head and relatively small limbs with no visible digits. On its head are three spikes: one in the front and one on each side. A single gray needle protrudes from the top of its head and there are additional needles in the spikes on the sides of its head. It has oval eyes with a single eyelash-like spike above each; its mouth and eyes give off a cyan glow. It has a long, tapering tail with a single spine in the middle. While most of its body is dark purple, it has several fuchsia markings: at the tip of each head-spike, on its chest, on top of its head, and on its face.
Poipole originates from Ultra Megalopolis in Ultra Space, where it is popular as a starter Pokémon. It is capable of understanding human speech after spending enough time with humans. Its large head is filled with a glowing, adhesive poison, which it can fire from the needles on its head. While spraying opponents with this venom, it laughs wildly. The anime reveals that wild Poipole live in nests that resemble wasp or hornet nests alongside Naganadel.
Poipole is based on a bee larva. Like its evolution, its needle-like appendages resembles the plunger of a syringe, with the head representing the barrel or tube and the venom representing the liquid inside.
Poipole is a combination of poison and pole. It is also a play on purple. It may also incorporate tadpole, as it is the infantile stage of Naganadel.
Bevenom is a combination of baby or bébé (French for baby) and venom.