Umbreon (Pokémon)

Eevee, Vulpes mutata selene, is a subspecies of cat-like canids in Canidae. It is a subspecies of and evolves whenever it is exposed to substantial darkness, as well as moonlight.

Etymology
Genus, from Latin vulpes, meaning "fox"; species name from Latin mutata, meaning "changing"; subspecies name from Greek selene, meaning "the moon, the Moon goddess Selene", because of its love for moonlight.