Waluigi

Waluigi (ワルイージ, Waruīji) is a character from the Mario series who has so far only appeared in spin-off and party games, as opposed to the main platformer titles. He is Luigi's evil rival, in the same way that Wario is Mario's evil rival. He is Wario's younger brother as well as one of his few friends. He first appeared in Mario Tennis on the Nintendo 64. Waluigi was created by Camelot's Fumihide Aoki and is voiced by Charles Martinet. The name "Waluigi" is a portmanteau of "Luigi" and the Japanese adjective warui (悪い, warui?) meaning "bad"; hence, "bad Luigi".

Waluigi's first appearance was in the Mario Tennis games for the Game Boy Color and Nintendo 64, as Wario's doubles partner, and then in 2005 on Mario Tennis: Power Tour for the Game Boy Advance. Later, along with ppPrincess Daisy, he joined the [[Mario Party series's roster in Mario Party 3 and has been a playable character in every main entry in the series since. He's since also appeared various other sports games.  He has only played a significant role in the plot of two games. In Mario Party 3, after clearing all other boards, Waluigi will steal the mischief star stamp and take it to Waluigi's Island, where the player must complete another round to get it back. In Mario Power Tennis, he, along with Wario and Bowser, participate in a scheme in order to wreck the Tennis Tournament and get rid of the Mario Brothers, which in the end, fails.  This would also mark the very first, and only time at the moment, that Wario, Waluigi, and Bowser have teamed up to take on the Mario Brothers.  In Dance Dance Revolution: Mario Mix, he is one of the villains, along with Bowser, attempting to wreak havoc with the Mushroom Kingdom's music.  Additionally, the opening cutscene reveals Waluigi to be the one who scattered the Music Keys in the first place.

Waluigi has a hat and gloves with a "Γ" symbol, which is similar to Wario's "W", which is also an upside-down "M". Unlike Luigi's green hat and shirt, Waluigi has a purple shirt and hat with black overalls, while his Γ symbol is yellow. Along with his boomerang-like mustache, Waluigi is taller and skinnier than Luigi, intending to highly exaggerate Luigi's physical characteristics, much in the same way that Wario exaggerates Mario's physical characteristics.