The codes should work with the region specified but may work for other regions as well.
Device Compatibility: Action Replay, CodeBreaker & GameShark
Season – Always First
800e7b1c000f
Support – Always First
800e7a8c000f
Support – Max Points
800db9680fff
Unlock Forty Lap Race Cheat
3001016c0001
Unlock All Tracks
3001016d0001
Unlock All Cars
3001016e0001
Disable Champ Disqual Cheat
3001016f0001
Unlock Mini Car Mode Cheat
300101700001
Enable Battle Mode
3001017100ff
Unlock Bonus Track Cheat
300101720001
Padded Barriers Cheat
300101730001
Bouncing Collisions Cheat
300101740001
Quicker Damage Cheat
300101750001
Higher Elevated Tracks Cheat
300101760001
Low Gravity Cheat
300101770001
Blurred Background Cheat
300101780001
Invisible Car Cheat
300101790001
Turbo Mode Cheat
3001017a0001
Oulton Park Isle Circuit Cheat
3001017b0001
Unlock All Difficulty Settings
3001017c0001
Unlock Ford Mondeo Cheat
3001017d0001