I just got a wii and want to be able to download the old nintendo games. Right now I have 2 sets of the Wii remote and nunchuk controllers? Do I need to buy the standard controller to play the older games? Will that work with Gamecube games? Can I buy gamecube controllers and use those with the NES/SNES/N64 games? Or can I use the controllers I already have for those games? Thanks for helping me out.