Wario-Man (Wario Man) is Wario's alter-ego in the WarioWare games. In the games he appears in, Wario-Man hosts the last set of microgames the player faces. There are no rules to his games and they all involve Wario to at least some degree. He's also Wario's Final Smash in Super Smash Bros. Brawl.
WarioWare: Twisted!
In WarioWare: Twisted!, while checking up on Dr. Crygor's production of WarioWare: Twisted! systems, Wario decides to sit down on the assembly line and play a game. The next thing he knows, he is tossed into Dr. Crygor's Gravitator. When he comes out, he has become Wario-Man! He goes back in the gravitator and turns it to a power suit, and flies up in space. Meanwhile, Orbulon, Mona, Kat, Ana, 18-Volt, and 9-Volt take a cruise on Orbulon's new ship, a yellow oinker. Orbulon sees Wario-Man and attacks him. Mona recognises Wario in the suit. After being attacked, he falls down in the water near Crygor's lab. Crygor is seen fishing at the end, and he reels in Wario.
WarioWare: Touched!
Wario-Man appears again in WarioWare: Touched!, though how Wario transforms into him is different. In this game, Wario starts to feel a little under the weather. He decides to eat some garlic to relieve himself, but the only garlic head left in the fridge is green and odd-looking. Since garlic is Wario's personal cure-all, he goes ahead and eats the thing anyway. The garlic infects Wario's stomach with viruses, and when Wario's immune system eats the viruses the reaction turns Wario into Wario-Man, and he ends up going on a rampage. Later on, Wario-Man is hit by a train and knocked into a sewer, wher he changes back to Wario, and is beaten up by the Sewer Guru. Oddly enough, Wario's moustache is not Red in this game, but rather Black, as usual.
Super Smash Bros. Brawl
Wario-Man also is Wario's Final Smash in the upcoming Wii game, Super Smash Bros. Brawl. Unlike most Final Smashes, Wario's Final Smash is more of a power-up than an attack. When Wario smashes open the Smash Ball, he eats a hunk of Garlic and gains a superhero suit, that boosts his power and speed by quite a bit and deflects some attacks. When using his normal attacks, he will hit with extra power, or gain added effects to the moves. His punches will act similarly to a Smash Attack, and his mid-air moves will allow him to float. In addition to boosted normal moves, his Special Moves will also gain extra strength and tactics, but his added speed will act as a downside when using the Wario Chopper, as he will ride it too fast.