Umbreon

Umbreon is a Dark type Pokemon and the Dark type Eevee.

Along with Espeon, Jolteon, Vaporeon, Eevee, Flareon, Glaceon, Leafeon and Sylveon, Umbreon is one of the Eevee evolutions.

Trivia

 * Heracross does a lot of damage against an Umbreon in battle since both fighting and bug types are strong against dark types.