D.J. Boy.

 No.  Code  Effect
   1  BCZA-JA94  Almost infinite life
   2  AGMT-JADR  Start with life meter at length of 1
   3  ARMT-JADR  Start with life meter at length of 3
   4  A0MT-JADR  Start with life meter at length of 5
   5  A4MT-JADR  Start with life meter at length of 6
   6  A8MT-JADR  Start with life meter at length of 7
   7  BCMT-JADR  Start with life meter at length of 8
   8  BGMT-JADR  Start with life meter at length of 9
   9  BLMT-JADR  Start with life meter at length of 10
 10  AGMT-JADG  Start with 1 life point in life meter
 11  ALMT-JADG  Start with 2 life points in life meter
 12  ARMT-JADG  Start with 3 life points in life meter
 13  A0MT-JADG  Start with 5 life points in life meter
 14  A4MT-JADG  Start with 6 life points in life meter
 15  A8MT-JADG  Start with 7 life points in life meter
 16  BCMT-JADG  Start with 8 life points in life meter
 17  BGMT-JADG  Start with 9 life points in life meter
 18  BLMT-JADG  Start with 10 life points in life meter
 19  AT6T-JA6A  Life meter not extended at end of each round
 20  SE6T-KEYA  Life meter extended by 1 at end of each round
 21  SE6T-KNYA  Life meter extended by 3 at end of each round
 22  CKBA-JA8N  All items in the item shop are free
 23  AVBA-JA84  All items in the item shop that you can afford are free  
 24  SHFA-MJWY  All coins worth 40
 25  SHFA-MNWY  All coins worth 60
 26  SHFA-MYWY  All coins worth 100
 27  SHFA-MAWY    All coins worth 160