Freeze timer:
800B0A94 0000

Endless Boost / Special Move:
800C3532 01A4

Always first on race:
D10C3572 0000
800C3572 0001

All cars:
800E02BC FFFF
800E02BE FFFF

Tracks:
Studio:
 800E0256 0161
Arches:
 800E025E 0161
Fraggle:
 800E0266 0161
Disco:
 800E026E 0161

Mega Jump (press and hold jump-button to jump higher):
800C3588 0040