This software is standardly included after using the “Express” option on the WiiLink Patcher. To figure out how to use it, click here.
Start up the Homebrew Channel and enter yawmME (YAWM ModMii Edition).
Highlight the WAD Check Mii Out Channel or Mii Contest Channel as its name and press + to select it. When it is selected, press A twice to install the WADs.
If you happen to get Error -1022/Error -1029 when installing Check Mii Out Channel, uninstall the channel by selecting the WAD with - and pressing A. Then, re-install the WAD.
After it is successfully installed, press the HOME Button to exit back to the Homebrew Channel. Press the HOME Button again and select "Exit to System Menu".
Congrats! You’ve installed the Check Mii Out Channel on your Console! Enjoy the Channel to your hearts content once again!