Extraterrestrial Pokémon introduced in Pokémon Sun and Moon. They are from an alternate dimension called Ultra Space. Their designs are much more elaborate and alien compared to normal Pokémon.
List of Ultra Beasts
Introduced in Sun and Moon
Nihilego, Code named UB-01 Symbiont (English) / UB-01 Parasite (Japanese)
Buzzwole, Code named UB-02 Absorption (English) / UB-02 Expansion (Japanese)