If you connect Wario World to the GBA, you'll get some extra goodies...

Wario World allows players to download samples of WarioWare,Inc.: Mega Microgame$ onto the Game Boy Advance via the Nintendo GameCube Game Boy Advance cable. This bonus provides a taste of the more than 200 lightning-fast microgames found in the Game Boy Advance title.

In the game, released this Friday, Wario must learn moves such as the "Piledriver" and the "Wild Swing-Ding" to help him fight an endless tide of weird and wild enemies. His arsenal of new moves includes picking up and swinging defeated foes to thrash hoards of oncoming monsters. This fast-paced game will have players chuckling at the comical injuries Wario sustains and laughing even harder at the damage he doles out to his foes!