.MII File Extension
Wii Virtual Avatar File
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What is a MII file?
Virtual avatar used by the Nintendo Wii gaming console system; stores properties for the avatar, such as the gender, hair color, skin color, facial features, and eye type; used to store customized characters that are controlled and animated during Wii gameplay.
Wii avatars can be created using the Mii Channel program for the Wii platform. Additionally, some MII file editors exist for PCs, but Nintendo does not support manual creation and modification of MII files.
NOTE: The My Avatar Editor desktop version requires an installation of Adobe AIR.