* {{g|Sun and Moon}}: [[Nebby]], the {{p|Cosmog}} that travels with [[Lillie]], eventually evolves into Cosmoem after being forced to open an [[Ultra Wormhole]] by [[Lusamine]]. At the [[Altar of the Sunne]]{{sup/7|S}}{{sup/7|US}}/[[Altar of the Moone]]{{sup/7|M}}{{sup/7|UM}}, the {{player}} and Lillie play the {{key|VII|Sun Flute|Sun}} and {{key|VII|Moon Flute}}s, causing Nebby to evolve into {{p|Solgaleo}}{{sup/7|S}}{{sup/7|US}}/{{p|Lunala}}{{sup/7|M}}{{sup/7|UM}}, where it eventually officially joins the player{{sup/7|S}}{{sup/7|M}}/its absorbed by {{p|Necrozma}} in order to become its Dusk Mane{{sup/7|US}}/Dawn Wings{{sup/7|UM}} form.
* {{g|Sun and Moon}}: [[Nebby]], the {{p|Cosmog}} that travels with [[Lillie]], eventually evolves into Cosmoem after being forced to open an [[Ultra Wormhole]] by [[Lusamine]]. At the [[Altar of the Sunne]]{{sup/7|S}}{{sup/7|US}}/[[Altar of the Moone]]{{sup/7|M}}{{sup/7|UM}}, the {{player}} and Lillie play the {{key|VII|Sun Flute|Sun}} and {{key|VII|Moon Flute}}s, causing Nebby to evolve into {{p|Solgaleo}}{{sup/7|S}}{{sup/7|US}}/{{p|Lunala}}{{sup/7|M}}{{sup/7|UM}}, where it eventually officially joins the player{{sup/7|S}}{{sup/7|M}}/is absorbed by {{p|Necrozma}} in order to become its Dusk Mane{{sup/7|US}}/Dawn Wings{{sup/7|UM}} form.
Cosmoem is a Pokémon in the shape of a translucent, dark blue orb with a starscape pattern set in a solid golden shell structure, which is made up of four ellipses intersecting each other in an asterisk shape and another intersecting the former four along the middle.
At the center of the main body is a much smaller black core with a blue and a pink marking on the front and an orange semicircle on both sides, giving it the appearance of a sleeping face. The shape also looks like an eye.
It does not, and cannot, move. In Pokémon Refresh, it cannot eat. It grows as it absorbs light. Its body is warm. In ancient times, it was worshiped by the people of Alola.
Requiring 43 levels to evolve from Cosmog and just 10 more to evolve into either Solgaleo or Lunala, Cosmeom has the lowest relative second-stage evolution requirement, at around 23%.
Origin
Cosmoem has characteristics of both a stylized sun and a stylized moon, having rays and a pair of crescents, respectively. Given its description, it seems to be an embodiment of star formation in general. It may also be based on the idea of the world egg. When viewed from the front, its shape resembles an eye.
This Pokémon article is part of Project Pokédex, a Bulbapedia project that aims to write comprehensive articles on each Pokémon species, as well as Pokémon groups and forms.