Waluigi

Waluigi Wario is a character found in the Mario series who was made to rival Luigi. Waluigi mainly only appeared in spinoff games such as Mario Tennis and Mario Party 3. Waluigi is known to be Wario's partner ever since Waluigi made his first appearance in Mario Tennis for the Nintendo 64 and was voiced by Charles Martinet ever since. Waluigi also appeared along with Wario and Luigi in Super Mario Advance games as a palette swap of Mario.

Waluigi's hat has a letter Gamma on it, showing his rivalry with Luigi, similar to Wario who has a W on his cap, shown to be an upside down M. Waluigi wears black overalls and purple clothes.Likes causing trouble also he doesn't give credit to Mario for completing his adventures.

The details of Waluigi's past are unclear since he has no confirmed background, although he was evidently been antagonizing the Mario Bros., especially Luigi, for quite some time before his debut as seen in the opening of Mario Tennis, where he and Luigi confront each other.

Appearances
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.

Mario Kart series
Waluigi has appeared in Mario Kart: Double Dash!!, Mario Kart DS, and Mario Kart Wii. He will also appear in Mario Kart 8.

Mario Kart: Double Dash!!
Waluigi is one of the characters in Mario Kart: Double Dash!! The anti-version of Luigi, Waluigi is a Middleweight Class Character, have Bob-ombs as his Special Item, along with Waluigi Stadium being his course, and Waluigi Racer noticeably being his kart.

Staff Ghost Courses in Mario Kart Wii

 * Waluigi Stadium

Super Smash Bros. Brawl
While Waluigi is not in the roster of playable characters, he appears as an Assist Trophy, along with his tennis racket, in a nod to his first appearance.

Super Smash Bros. 3DS/Wii U
Waluigi has been confirmed to return as an Assist Trophy in this game.

Game Appearances

 * Mario Tennis series *GBC is only GB/GBC appearance
 * Mario Kart series (After Double Dash!!) *7 is appeared background in Waluigi Pinball.
 * Mario Party series (After 3, except Advance)
 * Mario Golf series (After Toadstool Tour)
 * Game & Watch Gallery 4 (Antagonist)
 * Mario Football series
 * Mario Baseball series
 * Mario Hoops 3-on-3
 * Mario Sports Mix
 * Dance Dance Revolution: Mario Mix (Antagonist)
 * Yakuman DS
 * Itadaki Street DS
 * Fortune Street
 * Super Smash Bros. Melee (as a trophy)
 * Super Smash Bros. Brawl (as a trophy)
 * Mario & Sonic at the Olympic Games
 * Mario & Sonic at the Olympic Winter Games
 * Mario & Sonic at the London 2012 Olympic Games
 * Mario Party: Island Tour
 * Super Smash Bros. 3DS/Wii U

Wario
Waluigi and Wario appear to be brothers, sometimes working together (as seen in Mario Super Sluggers) or competing. Waluigi's partner in ''Mario Kart: Double Dash!! ''is Wario, as well. '

Trivia

 * Mario Kart 7 is the only game where Waluigi Pinball appeared, but Waluigi himself didn't.
 * According to the official guide to Mario Party 5, Wario and Waluigi are not brothers.
 * Waluigi was rumored to be in Super Mario 64, but no one has a video of playing as him. Proof:
 * In Paper Mario: The Thousand Year Door, Mario is able to change his clothes into Waluigi's by wearing both the L Emblem and the W Emblem badges.