Mario and Knuckles are enjoying an afternoon snack of grapes with Sonic and Peach. Toads are playing outside, Shy Guys are taking their pet Mousers for a walk, Goombas are... um... taking showers?!? Just then, the Koopa Clown Car and the Egg Pod come. Bowser and Eggman are here! An army of Egg Pawns and Hammer Bros. take Sonic and Peach captive. Bowser and Eggman laugh evilly, and Mario and Knuckles chase after them. But they are long gone. Now what?
There are no new power-ups. The only power-ups are Super Mario Galaxy power-ups.