These are the characters of Mario Kart: Ultimate Challenge. Some characters also have unlockable Pallete Swaps (these Pallete Swaps are not considered different characters). Each character have their own weight class (Light, Medium, Heavy) and different stats.
All the characters from past installments appear in this game, excluding the crossover characters: Link, Villager, Isabelle, R.O.B., Don-chan, Mametchi, Pac-Man, Ms. Pac-Man and Binky. Some characters, like Fire Mario, Ice Luigi, Cat Peach and Tannoki Mario appears as Pallete Swaps, altough Dry Bowser, who appeared in MKAGPDX as a Pallete Swap appears as an normal character.
There is one stamp for each driver. The palyer can collect a Stamp of one character if it wins one Grand Prix with this character.
The game begins with 16 racers (relative to the number of the racers' position, from 1st to 16th) and with the Mii racer (that can't be chosen in the player's first GP race)