Quit and Win

Race as the Extreme Team

Shoot Fergus

Quit and Win
Enter "RA50" as your name. If you quit a race, the game will count it as if you finished the race in the place you were in when you quit.

Race as the Extreme Team
Enter "XGTEAM" as your name. You should here a sound. Now, go back and enter in one of the programer's name. (Example: Ash, Greg, Shawn, Justin...) You can find more by looking at the credits. The programer's head will be placed atop your bike when you race.

Shoot Fergus
Enter "FERGUS" as your name and select the Shoot 'Em Up Mode. The game's director's head will replace the probes. Beware if you shoot Fergus though!

THANKS TO corinne FOR SENDING US THESE CODES!
If you enter "nitroid" as a name you will have infinite nitros.
If you enter 61GGB5 as a password you will have every track and 2 new bikes.

Thanks to splinter for sending in these codes!
Go To Multi Player Go to Cup and Add Player then you Enter your name to enter these codes:(Same with all these codes)
Code #1: FISHEYE
Example: Makes You Inside car Magnified.
Code #2: DS5GG1
Example: Gives you a mettalic purple colored car can reach up to 527 M.P.H.
Code #3: WIRED
Example: Makes The Picture in Steel Beams.
Code #4: GHOSTLY
Example: Makes it so that you can see through everything.
And here are some that you can figure out.
AntiGrav
Arsenal
banana
magnify
roller
stealth
uglymod
xtreme

Thanks to RCreviston for this code!
Go to the Password and punch in 81GGD5 for all bikes all tracks plus a secret track.