Start the game in two player mode. Have player one hold L2 + R1 and press Up, Down, Left, Right, Triangle. Then, have player two hold L2 + R2 + Triangle + X.
To unlock the option to choose between 125cc and 250cc, go through the game in career mode until the last level. Once there, acquire first place to unlock the option to change your cc's on your dirtbikes in any mode.
Get some air, then hold the Trick button and press the indicated button(s) to do the corresponding move:
| Master Code (Must Be On) | EC8522A0 144025B4 |
| 999 Race Points | 4CA3ADB4 1456E404 |
| High Stunt Score | 0CD6A770 1456E7A5 1CD6A770 17E9C70C |
