I think your having problems doing the SaveMiiFrii...
First, open your gamecube contoller... take it apart... now, plug it into the port closest to the memory cards (port 4)
on the D-Pad (the + next to the grey control stick) press all 4 buttons down. You'll have to keep the rubber inlay thing on it. after your absolutly sure that all 4 are held down (up, down, left, right) turn on the Wii. You should see a black screen with 3.4U on the bottom left.
If you don't see this, then your Wii is way too messed up for anyone on this board to help you with.
Try it a few times. Even with a region error, you should be able to SaveMii boot.
If it comes down to it, you might just have to pay for a service to reflash the NAND chip with the correct files.