Cosmog

Cosmog (コスモッグ) is a -type Pokémon introduced in Sun and Moon. Go here to see stats and other pokemon -

☀http://www.polygon.com/2016/11/8/13568048/pokemon-sun-and-moon-spoilers-pokemon-stats-moves-story

Physiology
Cosmog resembles a floating cloud colored in dark blue and purple. Two light-blue cloud-like formations stem upward from Cosmog's body.

Behavior
Cosmog evolves into a different form depending on the version of the game. If it evolves in Pokémon Sun, it will become Solgaleo; whereas if it evolves in Pokémon Moon, it will become Lunala, but the cocoon form is the same.

Evolution
Cosmog is the first evolutionary form of Solgaleo or Lunala. Cosmog can evolve into Cosmeom which evolves into Solgaleo or Lunala, depending on the version of game.

Etymology
Cosmog comes from cosmos and fog.