Game Shark Codes:

Always Place First 300D64E5 0000
Infinite Max Special 800D6554 0006
Max Championship Points 300C21DC 00FF
Unlock All Cups & Tracks 800986E8 FFFF
800986F4 FFFF
800986F8 FFFF
Unlock All Characters 800986F0 FFFF
800986F2 FFFF
Unlock All Movies 800986FC FFFF
All Challenges Completed 800986EC FFFF
800986EE FFFF