Waluigi

Waluigi (ワルイージ, Waruīji?) has so far only appeared in spin-off and party, as opposed to the main platformer titles. He is the same age as Luigi and is his darker rival, in the same way that Wario is Mario's darker rival. He is believed to be Wario's younger brother (although this is unconfirmed) as well as one of his many friends. The name Waluigi is derived from the Japanese adjective for evil- "warui" (悪い) and Luigi, which is pronounced like "ruiji" in Japanese. Waluigi has a short tempered attitude and is a huge sore loser, getting angry even if his opponent makes even a small amount of progress. He also will never cheer or become saddened even if an opponent wins, much like the other characters, instead he will get disgusted about it. Waluigi has a hat and gloves with an inverted L (Γ), which is similar to Wario's "W", an inverted "M". Waluigi was created by Camelot's Fumihide Aoki and is voiced by Charles Martinet.

Waluigi's first appearance was in the Mario Tennis for the Game Boy Color and Nintendo 64, as Wario's doubles partner. Later, along with Princess Daisy, he joined the Mario Party series' roster in Mario Party 3 where he played an antagonistic role, in which he owned an island full of traps; he has been a playable character in many entries in the series since, as well as various Mario sports and kart. He and Wario were also the main characters of the intro movies to Mario Golf: Toadstool Tour and Mario Power Tennis. He acts as an antagonist in Dance Dance Revolution: Mario Mix, in which he wreaks havoc in the Mushroom Kingdom by stealing special objects called the Music Keys in order to hypnotize the world with his dancing, thus enabling him to conquer it.

There has been a rumor that Waluigi can be unlocked in Super Mario 64 DS if a player finds the 2-d black box on the castle's left side. The player must then open it with Wario and then must go through a level with Wario and face the Bunny King. This rumor is easily proven false, as the block in question only exists on the file select screen.