Beat these record times to unlock a staff ghost racer for each track.
Baby Park: 1:14.000
Bowser's Castle: 2:47.000
Daisy Cruiser: 1:55.000
Dino Dino Jungle: 2:03.000
DK Mountain: 2:15.000
Dry Dry Desert: 1:53.000
Luigi Circuit: 1:29.000
Mario Circuit: 1:44.000
Mushroom Bridge: 1:34.000
Mushroom City: 1:53.000
Peach Beach: 1:15.000
Rainbow Road: 3:19.000
Sherbet Land: 1:28.000
Waluigi Stadium: 2:02.000
Wario Colloseum: 2:24.000
Yoshi's Circuit: 2:02.000