Umbreon is a Dark-type Pokémon introduced in Generation II of the Pokémon series. It evolves from Eevee when leveled up with high friendship during the night. Known for its sleek black fur and yellow rings, Umbreon is often associated with the moon and nighttime. As a defensive Pokémon, Umbreon has high special defense and can learn various moves to protect itself and counter opponents. Its abilities, such as Synchronize, allow it to inflict status conditions back to its attackers. Umbreon is popular among trainers for its unique design and strong battle capabilities.