buy the new official smash brothers gamecube controller and the mayflash usb adapter , i have them both and they work perfect for dolphin and wii u, dont buy second hand controllers they are old now and will be loose
cpu:i5 3470 @4ghz /ram:8gb ddr3 1600mhz corsair vengeance/ gfx: amd r9280x / psu:xfx pro 550 /windows 8.1 x64
