Lucario

Lucario as seen with Aaron in Pokémon: Lucario and the Mystery of Mew.

Lucario (Rukario in Japan) is a Steel/Fighting-type Pokémon that is only found in the Sinnoh (Shinou in Japan) region. Lucario is known as the Aura Pokemon, and most have the Aura within them. Though it is unknown that all Lucario can use the Aura, it is clear that Lucario in Lucario and the Mystery of Mew can.

Lucario has a starring role in the film Pokémon: Lucario and the Mystery of Mew. In the film, Lucario sees itself as a slave to Aaron, the person who caught him. In the movie, Lucario was going to try and help Sir Aaron save the castle, but Aaron trapped it in his Aura staff. Lucario stayed in there, not changing at all while the rest of the world progressed.

Lucario is also available as a player-character in the game Super Smash Bros. Brawl.

Lucario's attacks in Brawl are:

Standard Special - Aura Sphere
Side Special - Force Palm
Up Special - Extremespeed (called Agility in some cases)
Down Special - Double Team (called Counter in some cases)
Final Smash - Aura Storm