Shell Cup
The Shell Cup features four tracks that were originally available in previous versions of the "Mario Kart" series. The tracks are Peach Beach from "Mario Kart: Double Dash!!" on GameCube, Yoshi Falls from "Mario Kart DS," Ghost Valley from "Mario Kart" on Super Nintendo and Mario Raceway from "Mario Kart 64" on the Nintendo 64.
Banana Cup
Four retro race tracks are available in the Banana Cup series. Sherbet Land is from "Mario Kart 64," Delfino Square from "Mario Kart DS," Shy Guy Beach from "Mario Kart Super Circuit," and Waluigi Stadium from "Mario Kart: Double Dash!!"
Leaf Cup
The Leaf Cup series of races are not available until you place at least third in both the Banana and Shell Cups. The Leaf Cup contains Desert Hills from the "Mario Kart DS," Donkey Kong's Jungle Parkway from "Mario Kart 64," the Mario Circuit from "Mario Kart: Double Dash!!" and Bowser's Castle 3 from "Mario Kart Super Circuit."
Lightning Cup
Finishing in third or above in the Leaf Cup will unlock the Lightning Cup. The retro tracks here are Peach Gardens from "Mario Kart DS," the original Bowser's Castle racetrack from "Mario Kart 64," Donkey Kong Mountain from "Mario Kart: Double Dash!!" and Mario Circuit 3 from the original "Mario Kart."