Unlock Master Class
Finish the game on Expert Class, win first place in all 5 courses (any league)
All Tracks, Vehicles and Difficulties unlocked
At the title screen press: Up on D-pad, L, R, up on the right control stick, X, Y, ZR, + (start)
Shrinking cars
At the screen where you select your racer, hold L + R and press C-left and C-down.
Stop vehicle rotating
To stop the vehicle rotating, in the color and acceleration/speed change menu, simply press all 4 ''c'' buttons at once.
Larger Racers
At the ship selection screen: Hold L + R + Z + C-Up + C-Down + C-Left + C-Right
Change Car Colors
To adjust the color of your craft, press the R button while selecting you car to scroll through the available paint jobs.
Unlock more vehicles
To unlock more rows of vehicles, you must obtain a number of X marks on the cups. You get an X mark for each difficulty you clear a cup on (If you clear a higher difficulty before clearing a lower one, you will receive an X for all difficulties up to the one you cleared).
2nd row of vehicles
3 X marks
3rd row of vehicles
6 X marks
4th row of vehicles
9 X marks
5th row of vehicles
12 X marks
Joker Cup
Clear the Jack, King, and Queen Cups on Expert Difficulty.
Master Difficulty
Win the Jack, Queen, King, and Joker Cups on all three difficulties.
X Cup
Clear the Joker Cup on Expert Difficulty.
"Comic" Menu Screens
Complete Jack, Queen and King Cups on all difficulty levels
"Mechanical Cutaway" Menu Screens
Complete Jack, Queen, King, and Joker Cups on all difficulty levels