F-Zero X Cheats (Wii)

Unlock ALL Difficulties, Tracks and Vehicles: Press 'Start' at the 'Title' screen to
access 'Mode Select' and then enter L-Shoulder, Z, R Shoulder, Up-C, Down-C, Left-C,
Right-C, Start. If you have entered the code correctly you will hear a sound as
confirmation.

Unlockables 

Unlock Joker Cup: On Expert difficulty setting clear the Jack, King and Queen Cups.

Unlock X Cup: Clear the Joker Cup on Expert difficulty setting. 

Unlock Master Difficulty: Win the Jack, Queen, King and Joker Cups on ALL 3 difficulty
settings.