Mike Tyson Boxing cheats and cheat codes for Playstation

Unlock John L. Sullivan and Docks stadium
Select world mode, choose the "New career" option and select any boxer, then
enter "OLD MAN" as a name and finally push Triangle.

Unlock Jimmy Flex and Disco stadium
Select world mode, choose the "New career" option and select any boxer, then 
enter "CLUBFUD" as a name and finally push Triangle.

Invisible boxer
Select world mode, choose the "New career" option and select any boxer, then
enter "GONE" as a name and finally push Triangle.

Tiny heads
Select world mode, choose the "New career" option and select any boxer, then
enter "BINGY" as a name and finally push Triangle.

Giant heads
Select world mode, choose the "New career" option and select any boxer, then
enter "BONGY" as a name and finally push Triangle.

Giant hands and feet
Select world mode, choose the "New career" option and select any boxer, then
enter "STUPID" as a name and finally push Triangle.

Deactivate all cheat effect
Select world mode, choose the "New career" option and select any boxer, then
enter "NORMAL" as a name and finally push Triangle.

Heads grow when punched
Select world mode, choose the "New career" option and select any boxer, then
enter "OUCH" as a name and finally push Triangle.

Heads spin when punched
Select world mode, choose the "New career" option and select any boxer, then
enter "HURTS" as a name and finally push Triangle.

Necks stretch when punched
Select world mode, choose the "New career" option and select any boxer, then
enter "NECK" as a name and finally push Triangle.