Activate the following cheats by entering the corresponding codes:
CHEAT FUNCTION - CHEAT CODE
Race at high speed - L1 + RIGHT, R1 + DOWN, SQUARE, L1 + TRIANGLE, R1 + DOWN, L1 + LEFT, Select
TV camera - CIRCLE, L1 + TRIANGLE, L1 + X, TRIANGLE, R1 + UP
To unlock Granny, finish first in circuit mode at "Pro" difficulty. This will also unlock Planet X and the ramp park
Unlock Stunt Mode:
To unlock stunt mode, collect all 10 track coins in circuit mode.
Turn off fixed camera option:
Finish first in novice circuit. Then, when you go to trophies and look at the novice pin, you can toggle fixed camera on or off.