Waluigi

History:

Waluigi is one of the more vile humans in the Mushroom Kingdom. He abhors adventuring and so for many years while other graduates of the Mushroom Plumbing College like Wario and the Mario Bros. were out in the wilds unclogging the many Giant Warp Pipes throughout the land, Waluigi engaged many other pursuits. He founded a Motor Oil Company as well as an independent construction firm. Throughout the 90s he dabbled in Nazism until he met Princess Daisy, who he became obsessed with. His unrequited love of the Princess has both salvaged Waluigi's soul and separated him from his partner, Wario, who is obsessed with his own greed. It has also fueled much of his rage towards his nemesis and current Daisy beau Luigi. Since then he has still avoided adventures, but excelled in many Mushroom Sports Competitions 

I've looked into his eyes...he's pure evil.

Waluigi is much more rational than his only real friend in the Mushroom Kingdom, Wario. He was always fiercely independent and isn't motivated by greed or jealousy. Instead he gets his drive from lust, ambition and a distinct pleasure from causing harm in others. He's one to laugh at misery and exploit it using his own cunning mind. In addition to his Motor Oil Company he attemped and failed at the Waluigi Grand Prix, although the remnants remain on many courses throughout the Kingdom. Finally he has pioneered Waluigi Pinball, which began as a small string of Arcades and has now blossomed into enormous, dangerous Amusement Parks.

Double Dash:

Waluigi first appeared as a playable racer in Double Dash where he pairs with Wario. Double Dash placed emphasis on different Karts more than Characters, the Drivers only determined what Weight Class they could use and what Special Items became available. Individual Karts determined Racing Stats, and each Character has his or her own signature Vehicle.

Waluigi drives the Waluigi Racer, which he cannot use with his default partner, Wario because while Waluigi is a Middleweight, Wario is Heavy. The Waluigi Racer is a Kart of some extremes in some cases. It's on the faster end of Middle Karts, only slower than Luigi's Green Fire and also has the best Offroad Speed by far of any Middle Kart, in fact, it has the best in the game at 37 mph. Its turn speed isn't great among Middle Karts but pretty decent overall and it's smack int he middle of Acceleration (13th) and Weight (9th). All in all this seems great so far, but it also has the worst shocks in the game, making it the single bounciest Kart and most likely to lose speed on big hills. Therefore it's a great choice for maybe something generally flat but with lots of Offroad portions like Sherbert Land, Yoshi Circuit or Dino Dino Jungle.

The Wario/Waluigi partnership is the only Heavy/Middle partnership in the game, otherwise their Special Items are identical. Waluigi uses the Bob-omb, which is a better defensive than offensive weapon. When thrown behind it can be devastating for those on your tail, although be sure to be careful of it going off right behind you from a Red Shell or what not.The only problem is that it won't stay on the Track for long, exploding pretty soon after you drop it, so if you're very far ahead it's basically useless. When thrown ahead it is awful dangerous. There is a slim chance that you won't be involved in the explosion but it's difficult.

There are Secret Staff Ghosts to unlock in Time Trials here. Waluigi's personal course is Waluigi Stadium where he partners with Wario in the Wario Car at 1:59:658. For the later Wario Colosseum he rides behind his partner in the same Ride, this time pulling in at 2:21:106.

DS:

Only Waluigi and Daisy appear only in Double Dash, DS and Wii. Waluigi is still a Medium Weight Driver here, although by adding 2 to the weight of each Vehicle he is a bit heavier than Mario or Luigi. DS gave each Character three distinct Karts, each with specialized stats. Eventually every Character can use any Kart, with the only morphing stat being Weight. Generally Waluigi is one of the heavier Middleweights. Of the Three Karts initially available, there is basically a Standard, one with poorer stats but a better Item Rating and one with better stats but a poorer Item Rating. Here are Waluigi's Vehicles:

Waluigi generally has very good vehicles. The Zipper is clearly the precursor to the Bikes in Wii. None of his Rides have subpar stats. at worst his handling and drift are average with above average acceleration and pretty good speed. Waluigi also has a pair of Staff Ghosts in Time Trials. On his own Waluigi Pinball he goes 2:23:288 in the Gold Mantis. He also appears on the Retro Choco Island 2 from SMK. He uses the Zipper in 1:01:620. He's probably here as a reference to his Stadium Tracks as the Choco Islands are full of dirt.

Wii:

It's only a matter of time really.

In Wii Waluigi makes the upgrade to a Large Size Racer. Wii took its three different Size Classes and gave each Six Bikes and Six Karts to choose from, each with varying stats. In addition to this, each Character adds his or her own Bonuses to each Stat, making an incredible array of possible combinations. Waluigi is again a decent choice. His +6 Acceleration and +5 Drift are both at the Top among Large Racers and he adds a +3 Offroad as well. All of this makes him a good choice for those seeking Offroad Shortcuts or courses with tricky turns. Both is high acceleration and ability to use bigger vehicles also make him a nice choice for beginners. Here are Waluigi's Specific Stats, the maximum in any Category is 80:

Waluigi is most associated with the Offroader, it having comparable stats to the Wario Bike. It's also the Kart that best takes advantage of Waluigi's Stat Bonuses, likewise with the Wario Bike. These two Vehicles don't act much like typical Heavy Rides and since Waluigi doesn't really have typical Heavy Bonuses, he makes them work. It's also interesting that the default colour scheme on many of the Heavy Vehicles is Waluig's blue and gold, such as the Phantom and the Spear.

Waluigi only has one Staff Ghosts in this game. He drives on the Retro Waluigi Stadium with the Standard Bike L in 02:32.882. The Expert version, once unlocked, uses the very heavy Piranha Prowler in 02:12.367.