projectmgame.com
its a free game. it's a hack of brawl. you can launch it through the brawl stage builder, but make sure you have deleted all custom stages you have made, even the ones that came with the game.
you need a 2gb sd card and a copy of brawl. you play it on your wii. go to the downloads page on the website, and download Hackless Fullset. it might need to be extracted, i dont remember. when you have the files, copy all of them to an empty 2gb sd card, put that in your wii, launch brawl, go to stage builder, and it should start up. if the wii freezes, just hold down the power button.