Yellow Goomba has stolen six of the Mushroom Kingdom's Power Stars to power a machine that will replace all the weird hats the citizens of mushroom kingdom wear with top hats. He says that he will only give them back if everybody... races… around… several… racing tracks… and beats him. Everybody decides to work together to get the Power Stars back!
Doritos are found on the track, and fill up a gauge if they are collected. Gathering certain numbers of Doritos allows modes to be entered:
- Lightly Salted mode - collect 10 Doritos. The player's maximum speed will increase slightly.
- Tangy Cheese mode - collect 30 Doritos. A trail of melted cheese will be spread behind the player's kart for five seconds, slowing down any racers who drive into it.
- Spicy Doritos Mode - collect 50 Doritos. The player will become completely invincible to all hazards, and glide and swoop up in midair, for ten seconds.