The following are known Gecko Codes for Champion Jockey: G1 Jockey & Gallop Racer on Nintendo Wii (Wii).

P1 Max Speed [Glitch]
C2180664 00000002
3D804280 919900D8
C01900D8 00000000

Max RP [Glitch]
42000000 90000000
0524EAD0 00001388
E0000000 80008000

Train as much as you want [Glitch]
0413B638 7C601B78