Required:
Modded Wii/Wii U with Riivolution
SD Card
Disc with a mii in it
1. Download the XML here. Right-click the link and click "Save link as"
Download Mii Modifier v1.0 here!
2. Put the XML File in the riivolution folder on the root of the SD Card
3. Eject the SD from your computer and put it into the Wii/Wii U
4. Turn on the Console and insert the disc of your choice (Go to the Wii Menu on the Wii U)
5. Enter Riivolution either via the Homebrew Channel or the app
6. Enable any Hair or Skin Color option in Riivolution.
7. Congrats! You now have colored hair or skin on your miis.