Mii
When the player makes a Mii, they can use it in many different video games. Some games use Miis for all the characters, such as Wii Sports, Tomodachi Life, and Miitopia. Many other games use Miis with other characters, such as Mario Kart Wii and Super Smash Bros. Ultimate. A lot of games on the Wii and 3DS use Miis as a profile picture, such as Rhythm Heaven Fever and Rhythm Heaven Megamix.