The following are known Action Replay Codes for BMX XXX on Nintendo GameCube (GCN).

These codes are for the European version of the game.

Master Code – Must Be On
RGGN-U20T-UYAYZ
HVE5-C0JQ-ME8P9

Infinite Health
P85U-6QTK-BYCKE
6PNU-G33D-JG9V5
HT72-JX0V-H78Z3

Amish boy open
R8YE-E3TH-RTZXC
48YQ-306V-XRK68

All levels open
GWXC-16KV-UB31K
AU29-8DF1-F8EHE

All movies open
G25G-N6QZ-U95K2
2Y4M-17HM-Q6K5B