Sonic & Knuckles
Cheat Codes/Hints
Blue Spheres Passwords
Lock-On Sonic 1 or Sonic Classics, at the No Way! screen press A + B + C. The screen will now say ''Get Blue Spheres!''. At the bottom of the screen is a Code Number Password, change it to any of the fallowing passwords and press Start to activate it.
Final Level
4002 9900 9983
Level 123,457,207
2786 3464 9338
Level 123,457,210
3743 9899 8266
Level 123,457,215
2931 3016 3962
Bonus game trick
Put a game other than Sonic 2 or 3 in the top of the Sonic & Knuckles cartridge. Then, when it shows the picture of the trio and the message at the top, press A, B, and C simultaneously to play Bonus Games.
Debug Mode (Locked-On to Sonic 3)
1. Enter the level select code by pressing Left, Left, Left, Right, Right, Right, Up, Up, Up on the swinging vines in Angel Island. Press Start then A to restart the game.2. Enter the Level Select area (Sound Test) and select Mushroom Hill Zone Act 13. From here, grab on to the pully levers and press Left, Left, Left, Right, Right, Right, Up, Up, Up. Press Start then A. From this point forward, push and hold down buttons A, B, and C4. Enter Sound Test again.5. Select a stage of your choice. Once the Zone and Act title dissapear, you may release A, B, and C. There are a few differences in button layout now.A: (Normal Mode)Makes Sonic jump normally. (Debug Mode)Duplicates the selected item.B: Toggles between Normal Mode and Debug ModeC: (Normal Mode)Reverses Gravity. (Debug Mode)Toggles through the level\\\'s templates.
Debug mode and all Emeralds (locked-on to Sonic 2)
First activate and go to the Stage Select. Play the tracks in Sound Test with button B in this order:
01 09 09 04 01 00 01 08
This enables the Debug code, you should hear a ring chime if the code is entered correctly. start the selected level with A+start.
To get all 7 Chaos Emeralds, input this code the same way:
01 06 07 07 07 02 01 06
You should hear the Emerald chime. note: this code may not work without the Debug code
Debug mode in Sonic 3 and Knuckles
While playing sonic 3 and knuckles press Left, Left, Left, Right, Right, Right, Up, Up, Up in the mushroom hill zone, while on one of the pully things. (Just like level select in normal Sonic and Knuckles.) I think you have to do the level select code first.
Debug mode
Left, Left, Left, Right, Right, Right, Up, Up, Up
Level Select (When Locked-On to Sonic 3)
Start a game and go to Angel Island Zone Act 1. Go to one of the swings that you hang from and grab on. While Sonic is swinging, press Left, Left, Left, Right, Right, Right, Up, Up, Up. You will hear a ring if you entered the code correctly. Pause the game and press A to take you back to the title screen. Press Down twice to find the newly unlocked Sound Test menu. Enter it, where you can play all of the sounds/music in the game and warp to any level.
Level Select (when not Locked-On to anything else)
In Mushroom Hill Zone, while hanging off one of the pulling machines, press left three times, right three times, and up three times. You should hear the ring sound. Pause and press A to be taken to the title screen. Highlight either Sonic or knuckles as your character, and press start while holding A. The menu shows all levels in the game, but some are specific to a certain character, so you can't play those if you picked an incompatible character. Any time you want to exit and select a different level, just repeat the code from right after the pulling machine part.
Walk through walls
On levels that allow you to travel upwards or downwards greatly as you progress as Sonic, go to an area where Knuckles' path starts. Hold down and wait for the screen to drop, then jump (do not spindash). If done correctly at a area that will cause this, the screen will shift and scroll in a loop back to you. During this time, you are free to walk through walls. This can also be done in select areas of levels where there is no path for Knuckles.