What is a Mii
A Mii is a customizable avatar used on several Nintendo video game console and mobile apps. Miis were first introduced on the Wii and later appeared on the Nintendo 3DS, Wii U, Nintendo Switch, and various Nintendo apps for smart devices.
Wii Mii editor
Miis can be used as characters within games on the consoles, either as an avatar of a specific player (such as in the Wii series) or in the case of certain games (such as Tomodachi Life and Miitopia ).