GAME GENIE CODES: James Buster Douglas Knockout Boxing.
 No.  Code  Effect
   1  PPGA-AEDL  Rounds last 30 seconds instead of 1:30
   2  2PGA-AJDL  Rounds last 1 minute
   3  RPGA-AWDL  Rounds last 2 minutes
   4  EPGA-A6DL  Rounds last 3 minutes
   5  TPGA-BRDL  Rounds last 5 minutes
   6  6PGA-AAML  Rounds last 7 minutes
   7  57GA-A6ML  Rounds last 9 minues, 59 seconds
For Codes 8 thru 11, the referee still signals 10 on the last count,
but the count will be shortened according to the code.
   8  APDA-AADJ + APHT-AAEN
 + APHT-AAC6
 Knockout count is 3 instead of 10
   9  AZDA-AADJ + AZHT-AAEN
 + AZHT-AAC6
 Knockout count is 5
 10  A7DA-AADJ + A7HT-AAEN
 + A7HT-AAC6
 Knockout count is 7
 11  BFDA-AADJ + BFHT-AAEN
 + BFHT-AAC6
 Knockout count is 9
 12  P3WT-BFXR + 0BWT-B25T
 + AEAT-AACE + AJAT-AAGE
 Player 1's damage meter recovers more slowly
 13  P3WT-BFXR + 0BWT-B25T
 + CAAT-AACE + AJAT-AAGE
 Player 1's damage meter recovers faster
 14  P3WT-BFXR + 0BWT-B25T
 + JAAT-AACE + AJAT-AAGE
 Player 1's damage meter recovers much faster
 15  P3WT-BFXR + 0BWT-B25T
 + AJAT-AACE + AEAT-AAGE
 Player 2's damage meter recovers more slowly
 16  P3WT-BFXR + 0BWT-B25T
 + AJAT-AACE + CAAT-AAGE  
 Player 2's damage meter recovers faster
 17  P3WT-BFXR + 0BWT-B25T
 + AJAT-AACE + JAAT-AAGE
 Player 2's damage meter recovers much faster
 18  734T-ABYG + YB4T-B26J
 + ATAT-AABY + BJAT-AAFY
 Player 1 scores fewer points
 19  734T-ABYG + YB4T-B26J
 + EAAT-AABY + BJAT-AAFY
 Player 1 scores more points
 20  734T-ABYG + YB4T-B26J
 + BJAT-AABY + ATAT-AAFY
 Player 2 scores fewer points
 21  734T-ABYG + YB4T-B26J
 + BJAT-AABY + EAAT-AAFY
 Player 2 scores more points
 22  CTLT-AAC0 + CNLT-AAFE  Choose 1 to 19 rounds instead of 1-12 on options screen

Download The Big Book of Game Genie Codes.