"When agitated, this Pokémon protects itself by spraying poisonous sweat from its pores."
While Espeon was a classic Pokemon type turned Eeveelution, Umbreon was something else. The Dark-Type Pokemon class didn't exist until Johto, and so many were surprised that Game Freak focused on a new type for the evolution. What's more, they made sure that this one stood out in many ways, not the least of which was that this Eeveelution was the choice for Gary (Ash's rival) in the anime. And even in Alola via Pokemon Sun/Moon, Gladio has an Umbreon
Umbreon's Basic Attacks are Faint Attack and Snarl, while its Special Attacks are Foul Play and Dark Pulse.