Which characters are available in Mario Kart Tour?

As of the knowledge cutoff in early 2023, Mario Kart Tour features a large roster of characters which includes mainstays from the Mario franchise such as Mario, Luigi, Peach, and Bowser. Over time, Nintendo has expanded this lineup significantly through regular updates and seasonal events to include various iterations of these classic characters, like Musician Mario or Halloween Rosalina. The game also introduces original characters that are exclusive to the mobile title. Additionally, characters from outside of the Mario universe have made appearances in special crossover events. The precise lineup continuously evolves with new additions through tour updates, themed events, and special promotions. For an up-to-date list, one would typically refer to the official Mario Kart Tour website or the in-game character selection screen.