- BJ6A-ACD6
Rounds are 1 minute - BJ6A-AED6
Rounds are 2 minutes - BJ6A-AJD6
Rounds are 4 minutes - BJ6A-AND6
Rounds are 6 minutes - BJ6A-AWD6
Rounds are 9 minutes - CTXT-AA46
Rounds are infinitely long so you must win by knockout - AJ4T-AA2A
Infinite rounds and you must win by knockout - RH7A-A6YA
Set attributes to whatever you want when creating a new boxer - RH9A-A6TE
Attributes are not reduced after a fight - RH9T-A6VN + BM9T-AA9W
Pick as many training items as you want
Greatest Heavyweights - Game Genie Codes
The following are known Game Genie Codes for Greatest Heavyweights on SEGA Genesis.
- Prv:Sonic the Hedgehog
- Next:RoboCop 3
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