Mii Maker

The Mii Maker is an application found on the Nintendo Wii, Wii U, Nintendo 3DS and Nintendo Switch systems, where Miis can be created. It is known as the Mii Channel on the Wii. There was also a Mii Maker for the discontinued iOS/Android game Miitomo.

On the official Nintendo.com website, there is also a feature known as Mii Studio; it allows the user to create and edit Miis online, including retrieving/copying them from a Nintendo Network ID.

Mii Channel
The Mii Channel on the Wii was the first Mii Maker. The menu is a large, empty plaza where a max of 100 Miis can be stored. There are a few options on the menu such as creating, editing, or erasing a Mii, with other options like linking a DS or 3DS or storing Miis to a Wii Remote.

Mii Parade
The Mii Parade is a section of the Mii Channel where you can drag a Mii into a parade. You can have up to 100 Miis in the parade and take them back into the main plaza at any time (if there is space).

Mii Maker (3DS)
The Mii Maker on 3DS has a lot of similarities to the Mii Channel, such as the plaza menu returning, but split into ten rooms with ten Miis at a time in each one. The 3DS Mii Maker also introduced the Personal Mii, a Mii that could not be removed from favorites and was the default Mii automatically selected in some games and apps. Also, the 3DS introduced more Mii parts to work with, such as more hair styles, eyes, and mouths. The 3DS also allows the player to scan a QR code to import a Mii.

Miitopia Mii Maker (3DS)
The Miitopia Mii maker added the ability to add non-natural colors to some Mii parts, like bright red and teal. If a Mii is imported from Miitopia to the Mii Maker, the colors would be revered to default colors.

Tomodachi Life Mii Maker
The Tomodachi Life Mii Maker didn't add any extra body parts but did add more personal features such as the ability to add a first and last name, birth year, voices, and a Personality.

Miitomo Mii Maker
A Mii Maker was a feature of the iOS and Android application Miitomo. Players could either create a Mii from scratch or import one from My Nintendo or a QR Code (from Nintendo 3DS or Wii U). A camera function also allowed users to auto-complete the Mii and optionally edit it later.

Mii Maker (DS/DSi)
The games Tomodachi Collection, Personal Trainer: Walking, Yosuke Ide no Kenkou Mahjong DSi and Kuruma de DS feature their own Mii Makers; which can be seen as precursors to the Nintendo 3DS version. During development before the Wii, the Mii Maker was originally going to debut on Nintendo DS.

Mii Maker (Wii U)
The Mii Maker on Wii U is fairly similar to the 3DS version, but with different menus. The Wii U also allows the player to scan a QR code to import a Mii.

Mii Maker (Switch)
The Nintendo Switch Mii Maker added the non-natural colors from Miitopia back in with even more extra parts to work with, but with simpler menu. It also allows the user to import a Mii from a amiibo.

Miitopia Mii Maker (Switch)
The Switch port of Miitopia allows the player to apply Makeup and a Wig to a Mii, allowing for greater customization. These are not retained when a Mii is imported from Miitopia to the system

Pants Colors
There are a few colors a Mii's pants can be, all having different meanings. Gray Pants indicate that the Mii was made by the player, red indicate that the Mii is marked as a favorite, blue pants indicate that it is an imported Mii, such as from a QR code or from another console, and special Miis are marked with gold pants. These can be taken into the StreetPass Mii Plaza for other people the player meets via StreetPass to obtain.