There\’s no debate that Super Smash Bros. Melee on the Game Cube was the best Smash Bros. game in town. It was preferred by competitive gamers for having less random elements that made it difficult to demonstrate skill. Super Smash Bros. for the 3DS seems to be a return to that design philosophy. But for those who have still been playing on the GameCube until now, the controls on the 3DS my seem a little out of place.
YouTube user dekuNukem has put together a comprehensive tutorial on how to play any game (including Smash Bros.) on your 3DS using a Gamecube controller. For those of you with the technical know-how and the constant urge to dismantle your electronics, the modification is about $12 as long as you already have the controller. Just loosen a few screws, solder some wires in, put it all back together, and voilà, your very own GameCube controller adaptor for the 3DS!
The tutorial can be found in a Google Documents file here.