Cheat Codes:Sonic & Knuckles

Cheat Codes

These are cheat codes which can be accessed by inputting button sequences or by various other methods.

Cheat Codes, Sonic & Knuckles Alone

• Zone Select: While in Mushroom Hill Zone, jump on to one of the hanging platforms, then press L, L, L, R, R, R, U, U, U, A+Start. After being taken back to the title screen, select a character and press A+Start. Keep in mind that Sonic 3 levels are not available and that your character isn't able to go to levels it doesn't normally go to in the run of the game.
• Debug mode: Contrary to popular belief, there IS a debug mode available for this game. However, you need the Sonic 3 cartridge or ROM to do this. Simply start up Sonic 3 and Knuckles, unlock the level select and debug mode codes for that game and then highlight any level in the Sound Test, hold A, press Start, and release A when Sonic appears. Turn into a monitor, and paste a lot of monitors until you see things start to disappear. Then revert back to Sonic, and spindash into the monitors. The game will crash, and be buggy, if you're lucky. Press start, and then press A if necessary. If you are lucky, the game will redirect the the Sonic & Knuckles title screen. Choose any character, hold A then press start. You will be in the level select screen. Highlight any level, hold A, then press start. Note that if you choose any level before Mushroom Hill Zone, you will go into Mushroom Hill Zone instead.

In-level Functions, all versions:

Debug

Press B to toggle normal and debug mode.
Press A to advance forward through the debug object list.
Press A+C to advance backwards through the debug object list.
Press C to reverse gravity in normal mode, in debug it places the selected object at the current coordinates.
Current coordinates are designated by the top line of hex digits in the HUD.
Viewport coordinates are designated by the bottom line of hex digits in the HUD.

Slow-motion/Restart

During pause press A to fade to black and restart from the "SONIC TEAM PRESENTS" screen.
During pause press and hold B to enable slow-motion (this proceeds at half-speed, or 15fps, for as long as you hold the B button).
During pause press C to advance one frame.

Game Enhancer Codes

These are cheat codes that can only be used with game enhancer devices. Support for these codes is available in most emulators.

Game Genie

Official Codes, Sonic & Knuckles Alone

Code	Description
AFKT-AAG0	Start with 1 life.
AKKT-AAG0	Start with 2 lives.
AVKT-AAG0	Start with 4 lives.
AZKT-AAG0	Start with 5 lives.
A7KT-AAG0	Start with 7 lives.
BFKT-AAG0	Start with 9 lives.
DFKT-AAG0	Start with 25 lives.
GKKT-AAG0	Start with 50 lives.
NPKT-AAG0	Start with 99 lives.
K2WA-CA4J	Infinite lives.

Unofficial Codes, Sonic & Knuckles Alone

Code	Description
RFLA-A6W4	Enable Level Select (A+Start at Title Screen).
RFTT-A6XW	Enable Debug Mode (A+Start at Title Screen).
BCTT-LA3Y + BA8T-NA24	Knuckles can fight Knuckles.
REBA-C6V6	Invincible against dynamic objects (bullets, enemies, for example), except Knuckles.
RZBA-E6YA	Invincible against static objects (spikes, for example).
ABTA-NA7Y	Invincible against Knuckles.
PJAA-CA8C	Touch an enemy, and you will destroy it (except Knuckles).
ABTT-NA3G	Touch Knuckles, and you will damage him.
AANT-CAHL	Become Super/Hyper Sonic with 0 rings.
AB6A-CADA	Become Super/Hyper Knuckles with 0 rings.
AAPT-CAB8	Don't use up rings to maintain the transformation of any Super/Hyper character.
AANT-CAG6	Become Super Sonic without collecting Emeralds first.
AANT-CAGY + AAPA-CAB8	Become Hyper Sonic without collecting Emeralds first.
AB6A-CACW	Become Super Knuckles without collecting Emeralds first.
AB6A-CACL + AB6A-CAHR	Become Hyper Knuckles without collecting Emeralds first.
CLRA-BA0Y	Get One Emerald To Get Them All.
9WSA-BCET	Only One Blue Sphere Needed To Win Emerald.

Pro Action Replay

Unofficial Codes, Sonic & Knuckles Alone

The RAM seems to be the same between Sonic 3 & Knuckles and this version so the codes are the same.

Code	Description
FFFE12:0009	Infinite Lives.
FFFE20:0062	Infinite Rings (Turn off before end of level or the score tally continues forever).
FFFE24:0005	Infinite Time.
FFB038:??	Have Level Layout of (00=Sonic, 01=Tails, 02=Knuckles).
FFFF0B:??	Character Modifier (00=Sonic, 02=Knuckles).
FFFFE0:0001	Level Select Enabled (Press A + Start).
FFF711:??	HUD Display Modifier (00=Off, 01=On).
FFFF95:00	Special Ring Always Available.

Resources

• GameFAQ's - Regular cheat codes.
• The GSHI - Official Game Enhancer codes sepearated from User made codes.