NOTE The information below has not been tested, so please let us know if it works for you. Also, this is all the Contender info we currently have, if you have any other codes or hints please email us so we can get it posted. Thanks.

If you beat Beastman or Jackal then you will be able to play as them in the exibition mode. Also, after a while of title defenses you can access 2 secret characters named Goober and Rascal. To get these boxers go to the exhibition screen and load from the memory card. Then press square to go back to the load from cd characters. All the secret people will be there to play as