Poochyena

Poochyena (ポチエナ Pochiena) is a -type Pokémon introduced in Generation III. It can evolve into Mightyena starting at level 18.

Physical Appearance
Poochyena is a dog Pokémon. It has grayish-blackish fur and, if it is Team Aqua's Poochyena, has a robotic appearance and sharp fangs. Shiny Poochyenas are brown in color.

Trainers with a Poochyena
The most famous owner of the Poochyena is Team Aqua. Team Aqua's mission is to flood the lands to make room for -type Pokémon. Their arch-rival, Team Magma, wants to dry up the oceans to make way for more land-based Pokémon.

Trivia

 * Poochyena is one of only five pure dark types. The others are Umbreon, Mightyena, and Absol and Darkrai.

Evolution
Poochyena evolves into Mightyena at level 18 and Mightyena doesn't have any evolved forms.