GAME GENIE CODES: Bart's Nightmare. |
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| 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 |