I ended up playing a sort of TF game with myself where I put every character I had in Mario Kart Tour on a wheel, with the number of slots each character gets on the wheel being determined by how high their level was. Then, I would play through an entire tour in MKT, starting out as Red Yoshi. Every time I lost a race, I would spin the wheel and have to play as whoever the wheel landed on until I lost again. And once I finished the last race of the tour, then I became whatever species and gender the character I was playing as was for a week.
As you can see, I ended the tour off as a Monty Mole.