First, enter the screen to add a Mii using any of the following methods.
■ Method 1
1. Tap the Mii icon in the Menu.
2. Tap the Add a Mii button on the Manage Mii Characters screen.
■ Method 2
1. Open the details screen of a Mii Racing Suit.
2. Tap the Mii icon in the top right corner of the Mii Racing Suit.
3. Tap Add Mii displayed in the bottom left corner of the Choose a Mii screen.
Second, add the Mii using the method you wish on the Add a Mii screen.
There are two ways to add Mii characters:
Add them via a Nintendo Account (you will need to log in on the Nintendo Account website):
1. On the Add a Mii screen, tap Choose / Create a Mii.
2. Select a Mii character you've already created, or create a new one.
Add Mii characters using Mii numbers:
1. On the Add a Mii screen, input a Mii number that someone has shared with you into the Mario Kart Tour Mii number box.