Even though Nihilego will be the first Ultra Beast you will encounter in the wild, Poipole is actually the first Ultra Beast you can obtain. Actually, Poipole is the first Ultra Beast you will obtain, as it will be given to you from the Ultra Recon Squad after Ultra Necrozma has been defeat in Ultra Megalopolis. Poipole is a pure Poison Type Pokemon, being given to you at Level 40 and knowing the moves Charm, Venom Drench, Nasty Plot, and Poison Jab. What makes Poipole so intriguing is the fact that it's the only known Ultra Beast that can evolve.