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 Mii is a digital avatar used in Nintendo's Wii, WII U and
300px-Mii channel

The MII Plaza on the MII Chanel

 gaming consoles. They allow users to capture a likeness of themselves, other people, or invented characters. After creating one using the Mii Channel on a Wii or the Mii Maker application on a Nintendo 3DS or Wii U, Miis can be used as playable characters in various titles for each of the named consoles. The word "Mii" is often thought to be a mixture of the words "Wii" and "Me."