The following are known Game Genie Codes for James “Buster” Douglas Knockout Boxing on SEGA Genesis.

• PPGA-AEDL
  Rounds last 30 seconds instead of 1 minute and 30 seconds
• 2PGA-AJDL
  Rounds last 1 minute instead of 1 minute and 30 seconds
• RPGA-AWDL
  Rounds last 2 minutes instead of 1 minute and 30 seconds
• EPGA-A6DL
  Rounds last 3 minutes instead of 1 minute and 30 seconds
• TPGA-BRDL
  Rounds last 5 minutes instead of 1 minute and 30 seconds
• 6PGA-AAML
  Rounds last 7 minutes instead of 1 minute and 30 seconds
• 57GA-A6ML
  Rounds last 9 minutes and 59 seconds instead of 1 minute and 30 seconds
• APDA-AADJ + APHT-AAEN + APHT-AAC6
  Knockout count is 3 instead of 10
• AZDA-AADJ + AZHT-AAEN + AZHT-AAC6
  Knockout count is 5 instead of 10
• A7DA-AADJ + A7HT-AAEN + A7HT-AAC6
  Knockout count is 7 instead of 10
• BFDA-AADJ + BFHT-AAEN + BFHT-AAC6
  Knockout count is 9 instead of 10
• P3WT-BFXR + 0BWT-B25T + AEAT-AACE + AJAT-AAGE
  Player 1’s damage meter recovers more slowly
• P3WT-BFXR + 0BWT-B25T + CAAT-AACE + AJAT-AAGE
  Player 1’s damage meter recovers faster
• P3WT-BFXR + 0BWT-B25T + JAAT-AACE + AJAT-AAGE
  Player 1’s damage meter recovers much faster
• P3WT-BFXR + 0BWT-B25T + AJAT-AACE + AEAT-AAGE
  Player 2’s damage meter recovers more slowly
• P3WT-BFXR + 0BWT-B25T + AJAT-AACE + CAAT-AAGE
  Player 2’s damage meter recovers faster
• P3WT-BFXR + 0BWT-B25T + AJAT-AACE + JAAT-AAGE
  Player 2’s damage meter recovers much faster
• 734T-ABYG + YB4T-B26J + ATAT-AABY + BJAT-AAFY
  Player 1 scores fewer points
• 734T-ABYG + YB4T-B26J + EAAT-AABY + BJAT-AAFY
  Player 1 scores more points
• 734T-ABYG + YB4T-B26J + BJAT-AABY + ATAT-AAFY
  Player 2 scores fewer points
• 734T-ABYG + YB4T-B26J + BJAT-AABY + EAAT-AAFY
  Player 2 scores more points
• CTLT-AAC0 + CNLT-AAFE
  Choose 1 to 19 rounds instead of 1 to 12 on the Options Screen