Black And Bruised
At the "Setup" menu, select the "Cheat" option, then press Start, A, Y, X(2), Z(2), X, Y, A, Start to unlock all boxers.
At the "Setup" menu, select the "Cheat" option, then press Start, A(2), Y(2), Z(2), X(2), Start. Note: This code can be enabled on controller one for player one or controller two for player two.
At the "Setup" menu, select the "Cheat" option, then press Start, Z(10), Start.
At the "Setup" menu, select the "Cheat" option, then press Start, A, Y, A, Y, A, Y, X(3), Start. Note: This code can be enabled on controller one for player one or controller two for player two.
At the "Setup" menu, select the "Cheat" option, then press Start, Z, A, Y, X, Z(3), Start.
At the "Setup" menu, select the "Cheat" option, then press Start, A(3), Y(3), X(3), Start. Alternately, win all five default tournaments to unlock the Intercontinental Tournament.
At the "Setup" menu, select the "Cheat" option, then press Start, A, Z, Y, X, Start. Alternately, successfully complete Life mode with a boxer to unlock a new costume for that character.
At the "Setup" menu, select the "Cheat" option, then press Start, A, X, Y, Z, A, X, Y, Z, Start.
At the "Setup" menu, select the "Cheat" option, then press Start, Y, Z, Y, Z, A(2), Start. Alternately, win all survival modes to unlock the Scrapyard arena.
Win the Top Contender Tournament to unlock King Khan.
Win the Intercontinental Tournament to unlock Matador.
Win the Pro Tournament to unlock Odive.
Win the World Championship Tournament to unlock Old Master.
Successfully complete training mode to unlock the Training Robot.
Rapidly press A repeatedly after getting knocked down to restore a small amount of energy and help prevent a knockout.