Waluigi is Luigi's rival in the Mario series. He is related to Wario. Although he has never had a game about him, he still is an impact to series, because he has stared in some pretty successful games such as Super Smash Bros Brawl, and Mario Kart Wii. His first appearence was in Mario Tennis, where he first challenged Luigi, his main rival. One game he did have a big impact on was Dance Dance Revolution: Mario Mix. In the game, Waluigi is the main antagonist, as he steals the Music Keys. He entrusts them to Wario, and Bowser. In end however Mario collected all the Music keys, and deafeated Waluigi. In the Mario Kart series, Waluigi has a race course named after him called Waluigi Stadium, which appeared in Mario Kart: Double Dash, and reappeared in Mario Kart Wii. In Super Smash Bros Brawl, he appears as an assist trophy, but more effective then the others, because avoiding him can be rather diffulcult.