Question: how to evolve eevee into umbreon bulbapedia?
Answer: Umbreon (Japanese: ブラッキー Blacky) is a Dark-type Pokémon introduced in Generation II.
It evolves from Eevee when leveled up with high friendship during the night (in the main series games), or when leveled up with high friendship with a Moon Shard in the Bag (in Pokémon XD: Gale of Darkness).