Question: is nihilego in ultra beast?
Answer: Nihilego (Japanese: ウツロイド Uturoid) is a dual-type Rock/Poison Pokémon introduced in Generation VII. It is not known to evolve into or from any other Pokémon. It is one of the Ultra Beasts and is known by the code name UB-01 Symbiont (Japanese: ＵＢ０１ Ｐａｒａｓｉｔｅ).