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.
