Pass through all the gates on a course to enter the bonus Cash Course, which consists of $5 and $10 Gates.
Go to the TV marked with a "1" in the equipment room and press X to deactivate the CPU opponent. Highlight the equipment selections and deactivate them all by pressing X. Choose a course and begin the race. Because there are no opponents, you will always finish in first place. Repeat this process to collect an unlimited amount of money.
Extra first race money:
Enter 229, 013, 066, 016, 000, 000, 000, 000, 031 as a password. Use Paul Dillon to complete the Utah race. You will have $1,110 after the race.
Final race of the season:
Enter 254, 071, 216, 094, 085, 177, 113, 104 as a password to go to the final race in San Francisco.
End of Extreme level:
Enter 190, 069, 254, 049, 105, 048, 001, 016, 146 as a password.
Race in Italy and watch for the a section that dips downhill past some columns about = to > through the course. Go through the purple gate that is in the extreme left side of the screen. A hidden passageway through a crypt with skeletons and extra gates will appear.
Go to "Exhibition", and enter "Continue Season" mode. Select "No" when prompted to load from the memory card. Then, enter 237 190 190 080 000 000 176 113 219 as a password. A super athlete, $5030, all the possible vehicles, and a record of first place of the season (first two races) will be loaded.
Race in reverse:
Come to a complete stop and hold Triangle.
Highlight the "Help" option at the play/help screen and press Triangle(5). Jump during game play to fly.