Jet Moto 2

All Tracks
Set the skill to Master difficulty, and set 5 laps per race. Then, press X on Lil' Dave, and return to the title screen. Press Up, Down, Left, Right, R2, R1, L2, L1, within 4 seconds. Set the game to 3 laps per race and press X on Wild Ride, and return to the title screen. Press Up, Left, Down, Right, Square, R2, Circle, L2, with 4 seconds. You will hear a tone if done correctly. Set the skill to Amateur with Turbo Off. Press X on Bomber and return to the title screen. Press Up, Down, Left, Right, Up, Down, Left, Right, within 4 seconds. Go back to Options and set the difficulty to Professional with turbos on. Finally, press R2, R1, L1, L2, R2, R1, L1, L2.

Race as Enigma
Go to the Options Menu, set the difficulty to Master and set laps per race to 6. Now go back to the Main Menu and press Left, Square, Down, Triangle, Right, Circle, L1, R1