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Guest B, an example of a Mii.

A Mii is a digital avatar used in the Wii, the Nintendo 3DS, Wii U, and Nintendo Switch gaming consoles.

After creating one with a dedicated console application (if any), they can be used as playable characters in Wii-labelled games such as Wii Sports, Wii Fit, Wii Play, Wii Music, and Wii Party.

Storage

Wii consoles can store up to 100+ Miis, up to 10 that can be favorites. The Wii Remote itself can hold up to 10 Miis on its internal memory, which can later be transferred to another Wii console. However, they can only be edited on the console on which they were created. In addition, Miis could also be exchanged via the WiiConnect24 service, thereby allowing a player's Miis to "mingle" will enable such Miis to appear on other people's Wii consoles. Users can also transfer Miis to supported Nintendo DS games. The Miis can also be arranged in different orders.

Wii U consoles can store up to 3,000+ Miis, up to 50 that can be favorites. It's possible to import Miis from the console's Wii mode. It's not possible to store read Miis from Wii remotes. However, players can store the Miis in your remote on Wii mode, but only if they bought a Wii Remote before you had a Wii U and had a Wii in the past.

Miis can be transferred from Wii to 3DS and between 3DS and Wii U. 3DS and Wii U can import/export Miis as QR codes. An amiibo figurine or card can each have a Mii stored as its "owner". A linked Nintendo Network ID can store the Mii used for its console account online.

The Nintendo Account allows creation and cloud storage of up to 8 Miis, with one being used as an avatar. It's possible to import the Mii from a linked Nintendo ID.

The smartphone app Miitomo could also import/export via QR codes and use its main Mii for the Nintendo Account being used, including the current outfit worn in the app, for a time.

The Switch can use the Nintendo-Account Mii, though it can only read/write Miis via amiibo in games like Super Smash Bros. Ultimate, Mario Kart 8 Deluxe, etc.

Miitopia's Nintendo Switch Remake (and its available demo) allows creation of up to 500 Miis, and you can recieve other people's Miis via Access Keys, if you have Nintendo Switch Online.

Gallery

References

Mii-Making Websites

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