In Pokemon, at what level does Poochyena evolve?

Poochyena, a dark Pokémon, evolves into Mightyena at level 18. Known as the "Bite Pokémon," it was introduced in the Generation Three series of games: Pokémon Ruby, Sapphire, Fire Red, Leaf Green and Emerald.

The name for Poochyena is a combination of the words "pooch" and "hyena." The in-game Pokédex, which assigns Poochyena number 261, suggests that the Pokémon is an omnivore with a tenacious nature. The Pokémon is described as chasing its prey until exhaustion. The basic move for a level one Poochyena is "Tackle." It has three abilities: "Quick Feet," "Run Away" and, as a hidden ability unlocked under special circumstances, "Rattled."