Thunder Fox.
 No.  Code  Effect
   1  AATA-ACBE  Normal-game clock starts at 100
   2  AATA-AEBE  Normal-game clock starts at 200
   3  LATA-AEBE  Normal-game clock starts at 250
   4  AATA-AJB2  Long-game clock starts at 400
   5  AATA-ALB2  Long-game clock starts at 500
   6  LATA-ARB2  Long-game clock starts at 750
   7  XETA-AWB2  Long-game clock starts at 999
   8  AJTA-AA6A  Infinite time--most of game
   9  AANT-AADW  Start with 1 life
 10  AENT-AADW  Start with 2 lives
 11  ANNT-AADW  Start with 4 lives
 12  AJNT-AABT  Start at stage 2
 13  ANNT-AABT  Start at stage 3
 14  ATNT-AABT  Start at stage 4
 15  AYNT-AABT  Start at stage 5
 16  A2NT-AABT  Start in stage 5 against giant robot
 17  JZWA-AAGC  Flame throwers have less fuel
 18  AKWA-AAGG  Each bazooka holds 2 rounds
 19  AZWA-AAGG + AZXA-AAAG + AZXA-AAAR    Each bazooka holds 5 rounds
 20  BFWA-AAGG + BFXA-AAAG + BFXA-AAAR  Each bazooka holds 9 rounds
 21  CBWA-AAF8  Each machine gun holds 10 rounds
 22  EZWA-AAF8  Each machine gun holds 25 rounds
 23  LBWA-AAF8 + LBXA-AAAC + LBXA-AAAL  Each machine gun holds 50 rounds
 24  XFWA-AAF8 + XFXA-AAAC + XFXA-AAAL  Each machine gun holds 99 rounds
 25  BBFA-AA46  No loss of life if sucked into space
 26  AAZT-AADN + ABCT-AAD0  All weapons have unlimited capacity  
 27  A2VT-AA3R  Invincibility
 28  AENT-AAB0 + AENT-AACG  Start with 2 credits
 29  ANNT-AAB0 + ANNT-AACG  Start with 4 credits
 30  A6NT-AAB0 + A6NT-AACG  Start with 8 credits
 31  BENT-AAB0 + BENT-AACG  Start with 10 credits
 32  AC6T-AAEW  Infinite credits