Mii Fighters are playable characters in Super Smash Bros. for Wii U and Nintendo 3DS. They are based on a player's Mii character—so anyone can join in—and you can outfit them with fun costumes.

Miis are fading from Nintendo's forefront, but games like Mario Kart 8 Deluxe keep them relevant with added customization ...

series allow you to add any character to the roster in the form of a Mii Fighter. Miis were an essential part of Nintendo's unique appeal, but their popularity has waned in recent years.