Every boxer
At the "Setup" menu select the "Cheat" option. Then, press Start, X, Circle, Square(2x's), R1(2x's), Square, Circle, X, Start.

Constant power-ups
At the "Setup" menu select the "Cheat" option. Then, press Start, X, Circle, X, Circle, X, Circle, Square(3x's), Start.

Conversation mode
At the "Setup" menu select the "Cheat" option. Then, press Start, R1, X, Circle, Square, R1(3x's), Start.

Intercontinental Tournament
At the "Setup" menu select the "Cheat" option. Then, press Start, X(3x's), Circle(3x's), Square(3x's), Start. Or just win all five default tournaments to access the Intercontinental Tournament.

Invincibility
At the "Setup" menu select the "Cheat" option. Then, press Start, X(2x's), Circle(2x's), R1(2x's), Square(2x's), Start. Note: This code can be enabled on controller one for player one or controller two for player two.

Turbo mode
At the "Setup" menu select the "Cheat" option. Then, press Start, R1(10x's), Start.

Alternate costumes
At the "Setup" menu select the "Cheat" option. Then, press Start, X, R1, Circle, Square, Start. Alternately, successfully complete Life mode with a boxer to unlock a new costume for that character.

All boxers' Life mode
At the "Setup" menu select the "Cheat" option. Then, press Start, X, Square, Circle, R1, X, Square, Circle, R1, Start.

Fight as Odiva
Be the victor in the Pro Tournament.

Fight as Old Master
Be the victor in the World Championship Tournament.

Fight as Training Robot
Finish training mode.

Scrap Yard arena
At the "Setup" menu select the "Cheat" option. Then, press Start, Circle, R1, Circle, R1, X(2x's), Start. Or just win all survival modes to access the Scrapyard arena.

Fight as King Khan
Be the victor in the Top Contender Tournament.

Fight as Matador
Be the victor in the Intercontinental Tournament.

Hints & Tips

Restore energy
Swiftly press X repeatedly after getting knocked down to restore a small amount of energy and help prevent a knockout.