Drive the Porsche
Highlight car "F" in the car select menu. Hold [L] + [R] + [Y] and press [Right]. The "G" car (Porsche) will appear.
Drive the truck
Highlight car "G" (Porsche) in the car select menu. Hold [L] + [R] + [Y] and press [Right]. The "H" car (truck) will appear.
Secret rooftop track
Enter the mode select screen, highlight each option, and press [B]. The screen will display each mode and flash to confirm correct code entry. Choose the "Time Trial" option. Highlight any track on the course selection menu, hold [X] and press [A]. A rooftop track will appear, with the background from the track that was originally highlighted. Press [Y] during the race for an over-head view.
Replay pause
Press [Z] during the replay to pause the sequence.