Press and hold SELECT when choosing a course to race it in reverse.
Unlock Hidden Movies :
RR4 Intro - Clear EX tour 33.
RR5 Intro - Clear EX tour 34.
RR 2004 E3 Intro - Clear EX tour 35.
RR Arcade Intro - Clear EX tour 36.
Gallery Set 1 - Clear EX tour 37.
Gallery Set 2 - Clear EX tour 38.
Gallery Set 3 - Clear EX tour 39.
Rally-X Car :
Achieve a score of 50,000 points or greater in the Rally-X mini-game and complete race PRO-18, then go to World Tour mode and you will receive a message and movie unlocking the Rally-X special class car.
Unlock MAX World Tours :
To unlock MAX on world tours, complete all BASIC,PRO and EX world tours (tours 1-39).
Unlimited Nitro :
Hold select when choosing "OK" at the car and track confirmation screen (final screen before the race begins) in single race or time attack mode.