Umbreon (ブラッキー) is a Dark-type Pokémon introduced in Generation II, created by Atsuko Nishida. It has sleek black fur, glowing yellow rings, and crimson eyes, and evolves from Eevee through high friendship at night. A nocturnal Pokémon, Umbreon is known for its mysterious appearance and keen senses. When threatened, it can secrete poisonous sweat from the pores on its body, and its yellow rings glow in the darkness.