What Is a Mii? Creating and Using Nintendo Avatars
A Mii is a customizable avatar that represents you (or anyone you invent) across many Nintendo games and system menus. You build one by choosing a face, hair, body, and often a personality and voice, then reuse it in games that support Mii data. It's the right tool when you want a consistent character across titles like Tomodachi Life, Mario Kart, or a console's own profile screen — and it's not something you need for games that use their own fixed characters.
Where Miis show up
Miis appear in two broad places:
- System-level: the console's own Mii menu or profile area, where you store and edit your avatars.
- In-game: titles that read Mii data to populate characters, racers, or residents.
Across Nintendo's history this spans Wii, 3DS/Wii U, and Switch, plus some mobile apps. The exact features differ by system, which is the main thing to watch for when moving a Mii around.
Creating a Mii
The creation flow is consistent in spirit even when menus differ:
- Start a new Mii from the system's Mii menu (or from inside a game that offers creation).
- Choose a base or starting point — many systems let you begin from a default face, a random Mii, or a photo-based starting point.
- Shape the face: skin tone, face shape, eyes, eyebrows, nose, mouth, facial hair, glasses, and makeup options.
- Set hair: style and color.
- Adjust the body: height and build.
- Add personality and voice where the system supports it — this matters most in games that use Mii personalities, like Tomodachi Life.
- Save and name the Mii.
The expected result is a saved avatar that appears in your Mii list and becomes selectable in compatible games.
Common snags
- Feature limits: not every system exposes every slider. Older hardware tends to have fewer options than newer hardware.
- Photo-based creation: results vary a lot; treat it as a starting point and refine manually.
- Personality/voice: if a game ignores these, it's usually because that title doesn't read those fields.
Editing an existing Mii
Editing is normally non-destructive to the Mii's identity: you open the Mii in the system's Mii menu, change the features you want, and save. Games that already imported that Mii may or may not pick up the change depending on how they store the data — some read live from the system, others copy it at creation time. If a game shows the old look, re-select or re-import the Mii inside that game.
Sharing and transferring Miis
There are a few general routes, and which ones work depends on your hardware generation:
- Same-system sharing: send or receive Miis between consoles of the same family where the feature exists.
- QR codes: some systems generate and scan QR codes to move a Mii between devices.
- In-game import: many games let you pull in Miis from the system's Mii list rather than transferring files.
- Community collections: sites like TomodachiShare exist to discover and share Mii residents for Tomodachi Life, which is a practical way to populate an island without building every resident by hand.
If a transfer fails, the usual causes are mismatched system generations, a feature that isn't supported on your model, or a game that only accepts Miis created within it.
Differences between Mii versions
The important distinction is that "a Mii" isn't one fixed format across all Nintendo hardware. Newer systems generally offer more detailed customization, and some features (like certain personality or voice options) only exist on specific platforms or in specific games. Practically:
| Concern | What to check |
|---|---|
| Will my Mii look the same everywhere? | Not always — feature sets differ by system. |
| Will personality/voice carry over? | Only in games that read those fields. |
| Can I move it between generations? | Depends on the transfer method your systems support. |
Common uses
- Tomodachi Life residents: Miis become the islanders, so personality and voice choices actually affect gameplay.
- Mii collections: building a library of characters — real people, original characters, or themed sets — and reusing them across titles.
- Profile avatars: representing yourself in system menus and compatible multiplayer games.
If your goal is a specific game, check that game's Mii support first; if your goal is a reusable avatar across many titles, build it at the system level and import it where allowed.