Once in the ROMs folder, look for a folder named "gamecube." That's the folder you want to copy your games in. The Dolphin emulator supports the following GameCube file types: CISO, DOL, ELF, GCM, GCZ, ISO, NKIT.ISO, RVZ, WAD, WIA, and WBFS. Becausedownloading games you don't o...