Cassie Muniz
Waluigi is Luigi's villainous counterpart (like how Wario is to Mario).

Waluigi - Wikipedia, the free encyclopedia

Waluigi is a fictional character in the Mario franchise. He plays the role of Luigi's arch-rival and accompanies Wario in spin-offs from the main Mario series, often for the sake of causing mischief and problems. He was created by Camelot employee Fumihide Aoki and is voiced by Charles Martinet, who described Waluigi as someone who has a lot of self-pity and would "cheat to win".

Waluigi in Mario Kart 8

Cassie Muniz
Waluigi has never starred in his own game and usually only appears in Mario spin-offs. He is one of the least liked characters in the Mario franchise.
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