Supercross 2000

To display the Cheat screen, press C-Up at the "Select Event" menu.

No crashes:
Enter N0CR4SH as a code at the cheat screen.

Big bikes:
Enter B1GB1K3S as a code at the cheat screen.

Giant riders:
Enter G14NTS as a code at the cheat screen.

Headless rider:
Enter H34DL3SS as a code at the cheat screen for a headless
rider in practice mode.

Lunar gravity:
Enter M00N as a code at the cheat screen.

Big dirt sprays:
Enter B1GSPR4Y as a code at the cheat screen.
(Information from Cheat Machine)