GAME GENIE CODES: Bart's Nightmare.

 No.  Code  Effect
   1  AEBT-AADG  Start with 1 life
   2  ATBT-AADG  Start with 4 lives
   3  AYBT-AADG  Start with 5 lives
   4  A2BT-AADG  Start with 6 lives
   5  A6BT-AADG  Start with 7 lives
   6  BABT-AADG  Start with 8 lives
   7  BEBT-AADG  Start with 9 lives
   8  AJBT-AADW  Start on level 2
   9  ANBT-AADW  Start on level 3
 10  ATBT-AADW  Start on level 4
 11  AYBT-AADW  Start on level 5
 12  AJRT-AA4N  Invincible against hits and time-not against falling in quicksand or pits
 13  A2RT-AA6N  Infinite lives
 14  AAXA-BJ5L  Infinite cherry bombs after you buy one
 15  AAXA-BJ6J  Infinite rockets after you buy one
 16  FJ0A-AA2G  Infinite spray paint once you get it
 17  E3AT-AA68  Stop timer on door puzzle (level 3)
 18  AH0A-CAGE  Need 1 goal-level 1
 19  A10A-CAGE  Need 5 goals-level 1
 20  CD0A-CAGE  Need 10 goals-level 1
 21  C10A-CAGE  Need 15 goals-level 1
 22  ED0A-CAGE  Need 20 goals-level 1
 23  AECT-EAA6  Need 1 goals-level 2
 24  AYCT-EAA6  Need 5 goals-level 2
 25  CACT-EAA6  Need 10 goals-level 2
 26  CYCT-EAA6  Need 15 goals-level 2
 27  EACT-EAA6  Need 20 goals-level 2
 28  AERT-EACG  Need 1 goal-level 3
 29  AYRT-EACG  Need 5 goals-level 3
 30  CYRT-EACG  Need 15 goals-level 3
 31  EART-EACG  Need 20 goals-level 3
 32  FART-EACG  Need 28 goals-level 3
 33  GART-EACG  Need 30 goals-level 3
 34  AE4A-EAD0  Need 1 goal-level 4
 35  AJ4A-EAD0  Need 2 goals-level 4
 36  AN4A-EAD0  Need 3 goals-level 4
 37  AT4A-EAD0  Need 4 goals-level 4
 38  AY4A-EAD0  Need 5 goals-level 4

Download The Big Book of Game Genie Codes.