Knuckles in Sonic 2 - Game Genie Codes:

1. AX6D-AA3W - Knuckles doesn't lose rings when hit 2. HWLX-GA2Y - Infinite time 3. SD5X-BJT2 - Rings worth 2 4. SD5X-BNT2 - Rings worth 3 5. SD5X-BTT2 - Rings worth 4 6. SD5X-BYT2 - Rings worth 5 7. SD5X-B2T2 - Rings worth 6 8. SD5X-B6T2 - Rings worth 7 9. SD5X-BAT2 - Rings worth 8 10. AE5X-AAFY - Knuckles starts with 1 life instead of 3 11. AY5X-AAFY - Knuckles starts with 5 lives 12. A65X-AAFY - Knuckles starts with 7 lives 13. BE5X-AAFY - Knuckles starts with 9 lives 14. DE5X-AAFY - Knuckles starts with 25 lives 15. GJ5X-AAFY - Knuckles starts with 50 lives 16. KN5X-AAFY - Knuckles starts with 75 lives 17. NN5X-AAFY - Knuckles starts with 99 lives 18. JV1D-CA6W - Infinite lives 19. PVWD-CRDC - High jump for Knuckles 20. ABWD-CWDC - Super jump for Knuckles 21. ABWD-C2DC - Mega jump for Knuckles 22. ABWD-DTDC - Orbital jump for Knuckles