GAME GENIE CODES: Sonic & Knuckles. |
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| No. | Code | Effect |
| 1 | AFKT-AAG0 | Start with 1 life instead of 3 |
| 2 | AKKT-AAG0 | Start with 2 lives |
| 3 | AVKT-AAG0 | Start with 4 lives |
| 4 | AZKT-AAG0 | Start with 5 lives |
| 5 | A7KT-AAG0 | Start with 7 lives |
| 6 | BFKT-AAG0 | Start with 9 lives |
| 7 | DFKT-AAG0 | Start with 25 lives |
| 8 | GKKT-AAG0 | Start with 50 lives |
| 9 | NPKT-AAG0 | Start with 99 lives |
| 10 | K2WA-CA4J | Infinite lives |
| 11 | AWXT-CA4C | Don't lose rings when hit |
| 12 | HXRT-AA6A | Infinite time |
| 13 | 96BA-CAG6 + 98MA-CAF0 | Keep shields (fire, water, lightning) when hit |
| 14 | AKVT-AA76 + AMNA-EA24 | Keep rings between levels |
| 15 | ATGT-CA3Y | Super shoes don't run out with time |
| 16 | RENT-C6YA | Sonic can always double jump (can't use water shield or become Super Sonic) |
| 17 | RENT-C6V6 | Sonic can always use Fireball Spin Dash (can't double jump, bounce, or become Super Sonic) |
| 18 | RGSA-A6YY | Only 1 blue sphere needed to get a chaos emerald |
| 19 | AANA-CNA0 | Sonic jumps as high as Knuckles (slightly lower than usual) |
| 20 | 4ANA-CRA0 | High jump for Sonic |
| 21 | 2ANA-CWA0 | Super jump for Sonic |
| 22 | AANA-C4A0 | Mega jump for Sonic |
| 23 | AANA-DYA0 | Orbital jump for Sonic |
| 24 | TB5T-CNCR | Knuckles jumps as high as Sonic (slightly higher than usual) |
| 25 | PV5T-CRCR | High jump for Knuckles |
| 26 | AB5T-CWCR | Super jump for Knuckles |
| 27 | AB5T-C2CR | Mega jump for Knuckles |
| 28 | AB5T-DTCR | Orbital jump for Knuckles |
| 29 | ALNA-AACR | Rings worth 2 in special stage |
| 30 | ARNA-AACR | Rings worth 3 in special stage |
| 31 | AWNA-AACR | Rings worth 4 in special stage |
| 32 | A0NA-AACR | Rings worth 5 in special stage |
| 33 | BLNA-AACR | Rings worth 10 in special stage |
| 34 | A2NT-CAG6 | Only 6 chaos emeralds needed to become Super Sonic |
| 35 | AYNT-CAG6 | Only 5 chaos emeralds needed to become Super Sonic |
| 36 | ATNT-CAG6 | Only 4 chaos emeralds needed to become Super Sonic |
| 37 | ANNT-CAG6 | Only 3 chaos emeralds needed to become Super Sonic |
| 38 | AJNT-CAG6 | Only 2 chaos emeralds needed to become Super Sonic |
| 39 | AENT-CAG6 | Only 1 chaos emerald needed to become Super Sonic |
| 40 | AANT-CAG6 | Become Super Sonic without any chaos emeralds |
| 41 | NTNT-CAHL | 100 rings needed to become Super Sonic instead of 50 |
| 42 | FANT-CAHL | 40 rings needed to become Super Sonic |
| 43 | DENT-CAHL | 25 rings needed to become Super Sonic |
| 44 | BJNT-CAHL | 10 rings needed to become Super Sonic |
| 45 | AENT-CAHL | 1 ring needed to become Super Sonic |
| 46 | AANT-CAGY+AAPA-CAB8 | Become Super-Duper Sonic without any emeralds (you still need 50 rings unless using one of the above codes) |
| 47 | NTPT-CA50 | Rings aren't used as Super (or Super-Duper) Sonic/Knuckles |
| 48 | RHJA-E60L | Bonus round always activated after every checkpoint |
| 49 | BXLA-EA5G | Bonus round is always Slot Machine |
| 50 | A5LA-EA5G | Bonus round is always Glowing Spheres |
| 51 | A36A-CACW | Only 6 chaos emeralds needed to become Super Knuckles |
| 52 | AZ6A-CACW | Only 5 chaos emeralds needed to become Super Knuckles |
| 53 | AV6A-CACW | Only 4 chaos emeralds needed to become Super Knuckles |
| 54 | AP6A-CACW | Only 3 chaos emeralds needed to become Super Knuckles |
| 55 | AK6A-CACW | Only 2 chaos emeralds needed to become Super Knuckles |
| 56 | AF6A-CACW | Only 1 chaos emerald needed to become Super Knuckles |
| 57 | AB6A-CACW | Become Super Knuckles without any chaos emeralds |
| 58 | NV6A-CADA | 100 rings needed to become Super Knuckles instead of 50 |
| 59 | FB6A-CADA | 40 rings needed to become Super Knuckles |
| 60 | DF6A-CADA | 25 rings needed to become Super Knuckles |
| 61 | BK6A-CADA | 10 rings needed to become Super Knuckles |
| 62 | AF6A-CADA | 1 ring needed to become Super Knuckles |
| 63 | AB6A-CACL + AB6A-CAHR | Become Super-Duper Knuckles without any emeralds (you still need 50 rings unless using one of the above codes) |
| 64 | ACCT-CA2R | Can't drown |