The following are known Action Replay Codes for Knockout Kings 2000 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

Infinite Creation Points
800c56980064

Infinite Health P1
8001dabc082b
8001dabe0277
8001dac61420

Infinite Health P2
8001dabc082b
8001dabe0277
8001dac61020

Infinite Stamina P1
8002184c1000
8002184e3221
800218521020

Infinite Stamina P2
8002184c1000
8002184e3221
800218521420