Waluigi

Waluigi is a fictional character in the Mario series of video games. As Wario is Mario's rival, Waluigi's rival is Luigi. His relationship to Wario is foggy, at best, it his highly likely that he is Wario's younger brother, and one of his few friends. Its also worth noting that he seems to have a thing for Piranha Plants, as seen in Mario Party 3.

Games

 * Mario Tennis
 * Mario Party (3, 4, 5, 6 and 7)
 * Dance Dance Revolution: Mario Mix
 * Mario Kart: Double Dash!!
 * Mario Golf: Toadstool Tour
 * Mario Superstar Baseball
 * Super Mario Strikers