Waluigi (ワルイージ, Waruīji?) is a fictional character in the Mario series of video games. He accompanies Wario in spin-offs from the main Mario series, oftentimes for the sake of causing mischief. He was created by Camelot employee Fumihide Aoki and is voiced by Charles Martinet, who describes Waluigi as being someone who has a lot of self-pity, feeling everything is going right for everyone but himself. He stated in a later interview that he would enjoy a Waluigi game if one were ever created, commenting that the objective would be having to have Waluigi "cheat to win".
Since his first appearance in Mario Tennis, he has been largely criticized as being a poor knock-off compared to Wario created for the purpose of giving Wario a doubles partner. GamesRadar commented that Waluigi, as a character, is likely seen as being less legitimate than other characters, explaining why he has not appeared in primary Mario or Wario titles. In spite of the negative reception, some positive reception exists. IGN described him as being both a humorous character as well as a fan-favourite, while GameDaily listed him as one of the best anti-heroes, commenting that it was too bad that he didn't get his own game.