The following are known Action Replay Codes for South Park Rally on Sony Playstation (PS1).

The codes should work with the region specified but may work for other regions as well.

Device Compatibility: Action Replay, CodeBreaker & GameShark

All Char & Extra Cheats
800a338cffff
800a338effff

Unlock All Races
800a3390ffff

Unlock All Tracks
800a3394ffff

Infinite Credits
8009c33c0005