Cheat: 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.

Unlockable: Rally-X Car
In the Rally-X mini-game score 50,000 points and you will unlock the Rally-X special class car.

Unlock Mirror Mode
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.

Unlock Kamata Angelus
Beat Pro Tour 20 Angelus Duel.

Unlock Max Tour
Complete all EX Tours.

Unlock Pac-Man Car
Complete PRO 21 tour to unlock Pac-Man.

Unlock Soldat Crinale
Race four races against the Crinale in PRO 19 tour.