The following are known Action Replay Codes for Knockout Kings 2001 on Sony Playstation 2 (PS2). These codes were also known as GameShark Codes and in most cases will work on both devices.

Device Compatibility: Action Replay & GameShark (Version 1 & 2)

Master Code – Must Be On
EC8EC840 1456E60A

Infinite Creation Points
3CB34C88 1456E733

Max Stats Created Character
1CB34CA0 61DFB00C
4CB34CA4 1456B00C

Max Power
3CB34CA0 1456E70C

Max Speed
3CB34CA1 1456E70C

Max Stamina
3CB34C9E 1456E70C

Max Chin
3CB34C9F 1456E70C

Max Heart
3CB34CA4 1456E70C

Max Cuts
3CB34CA5 1456E70C

8 Foot Created Character
4CB34C9C 1456E785

9 Foot Created Character
4CB34C9C 1456E779

300 Pound Created Character
4CB34C9A 1456E6B9

400 Pound Created Character
4CB34C9A 1456E635

P1 Infinite Health
1C8222B4 1456E7A5

P2 Infinite Health
1C822280 1456E7A5

Infinite Stamina
1C820F10 15F6E79D
1C820F14 1456E7A5

Lifeless A.I.
1C8266C0 15F6E79D
1C8266C4 1456E7A5