Action Replay Codes [US]

The following are known Action Replay Codes for Sonic & Knuckles on SEGA Genesis / Mega Drive (Genesis).

The codes should work with the region specified but may work for other regions as well.

Device Compatibility: Action Replay

• Infinite Rings
  FFFE20:00C8
• Infinite Lives
  FFFE12:0009
• Infinite Continues
  FFFE18:0009
• Only Need 1 Blue Sphere For Chaos Emerald
  FFE438:0001
• Only Need 1 Blue Sphere For Chaos Emerald (On An Actual System)
  FFE439:0001
• Stage/Act Modifier
  FFFE10:XXYY

  Quantity Digits for “XX” (Stage):

  04 – Flying Battery
  07 – Mushroom Hill
  08 – Sandopolis
  09 – Lava Reef
  0A – Sky Sanctuary
  0B – Death Egg
  0C – The Doomsday
  14 – Bonus Stage(?)
  15 – Bonus Stage
  16 – Lava Reef [2]
  17 – Death Egg [2]

  Quantity Digits for “YY”(Act):

  00 – Act 1
  01 – Act 2
  02 – Act 3

  Not all stages have acts 2 or 3.

• Invincible (Only Tested On Sonic & Knuckles With Sonic 2)
  FFB02A:0002
• Stage Select (Press A + Start)
  FFFFE0:0001
• Infinite Time
  FFFE24:0005
• Have All Emeralds
  FFFFB1:0007
• Switch Effects On For Levitate Jump For Sonic Or Knuckles
  FFB01A:FE
• Play As Knuckles
  FFFF0B:03
• Play As Tails
  FFFF0B:02
• Play As Sonic
  FFFF0B:01
• Knuckles Level Layout
  FFB038:02
• Tails Level Layout
  FFB038:01
• Sonic Level Layout
  FFB038:00

Game Genie Codes

The following are known Game Genie Codes for Sonic & Knuckles on SEGA Genesis.

• Start With 1 Life
  AFKT-AAG0
• Start With 2 Lives
  AKKT-AAG0
• Start With 4 Lives
  AVKT-AAG0
• Start With 5 Lives
  AZKT-AAG0
• Start With 7 Lives
  A7KT-AAG0
• Start With 9 Lives
  BFKT-AAG0
• Start With 25 Lives
  DFKT-AAG0
• Start With 50 Lives
  GKKT-AAG0
• Start With 99 Lives
  NPKT-AAG0
• Infinite Lives
  K2WA-CA4J
• Rings Stay In Special Stage
  RCSA ACA6
• Make Rings And All Red Spheres Turn Into Rings
  RCST ACAJ
• Enable Level Select
  RFLA-A6W4
  Note: Press and hold A and Start on the Title Screen to activate.
• Enable Debugger 2
  RFTT-A6XW

Note: Press and hold A and Start on the Title Screen to activate.

• Knuckles Can Fight Knuckles
  BCTT-LA3Y
  BA8T-NA24
• Invincible Against Dynamic Objects (Bullets, Enemies, Etc.), Except Knuckles
  REBA-C6V6
• Invincible Against Static Objects (Spikes)
  RZBA-E6YA
• Invincible Against Knuckles
  ABTA-NA7Y
• Touch An Enemy, And You Will Destroy It (Except Knuckles)
  PJAA-CA8C
• Touch Knuckles, And You Will Damage Him
  ABTT-NA3G
• Become Super/Hyper Sonic With 0 Rings
  AANT-CAHL
• Become Super/Hyper Knuckles With 0 Rings
  AB6A-CADA
• Don’t Use Up Rings To Maintain The Transformation of Any Super/Hyper Character
  AAPT-CAB8
• Become Super Sonic Without Collecting Emeralds First
  AANT-CAG6
• Become Hyper Sonic Without Collecting Emeralds First
  AANT-CAGY
  AAPA-CAB8
• Become Super Knuckles Without Collecting Emeralds First
  AB6A-CACW
• Become Hyper Knuckles Without Collecting Emeralds First
  AB6A-CACL
  AB6A-CAHR
• Blue Knuckles In Level Select
  AV8A-AAE6
• Tails Through Level Select
  AK8A-AAE6
• Each Ring Is Worth 3
  SCWT-DNZR
• Each Ring Is Worth 8
  SCWT-DAZR
• Rings Worth 51
  SCWT-DDZR
• Rings Worth 16
  SCWT-DXZR
• Rings Worth 22
  SCWT-D1ZR
• Rings Worth 12
  SCWT-D5ZR
• Rings Worth 109
  SCWT-D9ZR
• Whenever You Get Hit, Your Ring Count Goes To 99
  NRXT-CACE