What you will need: Wii Backwards Compatible with GameCube GameCube Controller GameCube Memory Card SD Card (does not require USB stick unless you don't have a PC with the SD Card slot) Hacked with the Homebrew Channel (you can hack your Wii very easily just by using an SD Card) Now to the instructions on how to get NGC Backups working on Wii BC-NGC PC - Part 1/2 GCM Utility - Shrinks NGC games too a lower size (optional but sometimes makes them work properly). DM Toolbox - Installs the NGC games on the SD Card game folder. Wii - Part 2/2 Install Dios Mios Lite v2.10.wad through MMM App After installing DML exit MMM. Now you can freely use any GameCube Loader that is up to date. I personally recommend DML Booter it's quick to load, simple and straight to the game.
A slight warning: Please make sure to check out the list of compatibility because not all games are compatible, and as such if you need to remove DML then you could use cMIOS, RVL-mios-10.wad or others. Games such as Chaos Theory are red flag i.e, do not work absolutely with DML activated.
Something else you can do like this on your Wii is install QuadForce and play Triforce arcade games on your Wii. Triforce is basically an arcade version of the GameCube. The current playable games on the Wii are: F-Zero AX Mario Kart Arcade GP Mario Kart Arcade GP 2 Virtua Striker 4 Ver.2006 Note if you install QuadForce you will not be able to play GameCube games from the SD card / USB hard drive until reinstalling your regular MIOS, which will uninstal QuadForce. Mario Kart Arcade GP 2 is something you should experience as an Nintendo fan, its erm different lol but pretty interesting to play.