Cosmoem

Cosmoem (コスモウム) is a -type Legendary Pokémon introduced in Generation VII. It is the evolved form of Cosmog and the pre-evolved form of Solgaleo (in Sun) and Lunala (in Moon).

Evolution
Cosmoem is the evolved form of Cosmog. It evolves into Solgaleo (Sun) or Lunala (Moon) at level 53.

By TM
This Pokémon learns no moves via TM/HM.

By breeding
This Pokémon learns no moves via breeding.

By tutoring
This Pokémon learns no moves via tutoring.

Trivia

 * This is both the smallest and the heaviest of all Pokémon, being only as tall as Joltik but weighing as much as Primal Groudon.
 * Even though its evolved forms (both Solgaleo and Lunala) are much bigger than Cosmoem, they weight much less.
 * Cosmoem has a distinctive metallic hum in its cry. This also happened on all other Ultra Beast, Solgaleo, Lunala and Necrozma.

Origin
Cosmoem is based on a protostar. Its immense weight despite its miniscule size may be a reference to incredibly dense neutron stars. Its appearance may also be inspired by an eye, as well as an egg.

Etymology
Cosmoem may be a combination of "cosmic", "embryo" and "maelstrom".