Use Any Region Changer ModMii Edition
- Launch "Any Region Changer ModMii Edition" via the Homebrew Channel
- After reading the warning, press A to continue.
- You will see this error at the top of the screen: "WARNING: AREA/SysMenu MISMATCH!"
- Press ↓ until "Auto Fix Settings" is selected and press A.
- Press any key to continue, and the "WARNING: AREA/SysMenu MISMATCH!" error should disappear.
- Now return to the HBC by pressing the Home button or by navigating to "Exit to the Homebrew Channel" and pressing A.