Greatest Heavyweights
Quick knockouts:
Press C(2) during the introduction
sequence. Your first punch will knock your opponent out.
Although posted as a valid code
on other web sites, it does not function in the retail version
of the game.
Invincibility:
Press B(2) during the introduction.
Although posted as a valid code
on other web sites, it does not function in the retail version
of the game.