When playing any level which you have accesed using the cheat menu , pause the game and hold down B. Whilst B is held down , the game will play in slow motion mode.
When you have done the level select cheat go to the Stage Select screen and choose the special zone for playing Blue Sphere. Select Knuckles as your character and start, when you quit and go back to Stage Select and choose a stage, you'll be Knuckles without having to use the Sonic and Knuckles add on.
On the level select menu, play sounds 01, 03, 05, 07. Highlight Special Stage 2 and press A + Start.
When playing a level after enabling the level select cheat, pause the game, then press the C button to advance the game by one frame.
To get all 7 Chaos Emeralds without having to complete their Special Stages, first enter the level select and sound test code. Go to the Sound Test and play the following tunes in order: 02, 04, 05, 06. You will hear an emerald sound if the code is entered correctly. To get Super Sonic after entering the previous code, just select any level from the level select and start it. Once you acquire 50 Rings, do a double-jump to become Super Sonic.
Manage to beat a stage at with your time at exactly 9:59 and you'll net yourself an easy 100000 points.
In the Icecap Zone Act 1, when you come to a wall that only Knuckles can bust through, Hold the Down button until sonic or tails looks down, and the screen pans all the way down. Then Press up and jump at the same time. The screen will start to rotate, walk in the direction of the wall and you will walk right thru it. This only works on Act 1 of The Icecap Zone.
Make your way to the end of Act 1 of Hydrocity Zone (Zone 2). When facing the mini-boss, keep yourself underwater until the water warning music plays. Then jump out of the water.
The game should now be playing the mini-boss music from Sonic and Knuckles, which wasn't out at the time (the music was evidently included in Sonic 3 to make the backwards compatibility feature easier).
|Your character will show you all of his sprite animations||Hold B and press C|
|Your character will stop the sprite show if it is activated||Hold B and press C again|
When the "SEGA" screen fades, quickly press Up-up-down-down-up-up-up-up. If you have done this right, you should be able to scroll down to "Sound Test" below "Competition". The ups and downs are very difficult in the short amount of time provided, but with practice, it is pretty easy.
First, enable the level select cheat and the debug mode which are available here. For this to work, you must choose Sonic and Tails as the players.
After entering the codes, choose any stage from the level select menu(preferrably stage 1)
As soon as you can move Sonic, hold down, and press C(don't let go of down on the D-pad). This will activate Sonic's spin; Tails will copy the Sonic spin also.
Press the B button and Sonic will become the Debug cursor.(Tails will be locked in the sonic spin move).
Press A until you(the debug cursor), displays an enemy sprite, like the monkey or that bee robot. Now that the debug cursor displays an enemy sprite, move the debug cursor to where Tails is, and repeatedly tap C.
This will produce enemies where Tails is, and since Tails is locked in the sonic spin move, he will destroy the enemies. As Tails destroys enemies in this position, press C more until the score for destroying an enemy increases from 100 to 8000 to a 1up. Once you have enough 1ups, press B again to revert to Sonic.
First, you enter the stage select code, shown above. Then you go into the Special Stage in the stage select menu. Every time you finish the special stage press reset and go back to the special stage. Keep doing this until you get the sixth emerald. Then you don't press reset. It will just zap you with your six emeralds into emerald hill. Get the last emerald on Emerald Hill get 50 rings and jump to be super sonic. Be careful to not run out of rings or else you will change into Sonic again. The rings start dissapearing when you are Super sonic.
Go to the sound test (not the one on the level select) and put in 19, 65, 09, 17, 01, 01, 02, 04 (press A after each one). There won't be a confirmation sound. Start the game by pressing Start on the first option (character select) and you should have 14 continues.
Normally, when you turn into super sonic you lose tails behind you all the time.
Well, after you put in the debug cheat and have started a level (preferrably Emerald Hill), turn yourself into a box and place it somewhere on the floor WHILE you are super sonic. It should be a switch places box. Hit it and you will see tails will have a permanent invincible circle around him. He will stay like this through the whole level, he will keep up with super sonic or even out run him. A very fun glitch for 2 players.
In Oil Ocean Zone, if you manage to take a hit and end up landing in one of those green-and-gold checkered cannons, you'll fall right out, but you'll be moving at twice your normal speed as well as jumping twice your normal height(with twice as much gravity). A good place for doing this would be in Oil Ocean Zone, Act 2, near the first set of pop-tops and cannons. Just jump into the semi-hidden bed of spikes on the right and land in the cannon.
Note: Moving at twice normal velocity can often get you stuck in a wall. Also, this wears off if you Super Spin Dash or Spin Dash. It also only lasts for that Act.
|Causes the game to play in slow motion.||Level Select, Pause, hold B|
Press up, up, up, down, down, down, up at the title screen
|Different ending||Beat game with all chaos emeralds.|
When you ride the green block accross a sea of lave, there are a couple of big blocks in front of you with rings on. If you hold the D-PAD DOWN button, Sonic will crouch. The green block will go underneath the blocks, but sonic will remain on it, and pass through the walls. Note that this ONLY WORKS WHILE CROUCHING
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.
Level select when locked onto Sonic 2At the title screen hit: Up, Up, Up, Down, Down, Down, Left, Right, Left, Right<p />If entered correctly you should hear a ring sound. Then hold A and press Start
|Debug mode||Left, Left, Left, Right, Right, Right, Up, Up, Up|
This is for Knuckles in Sonic 3 and works on Sonic Classic Collection. Start a new game and play through the entire game. After you have beaten the game, you are able to to pick any level on that save file. Now start on Zone 1 (Angle Island), go to the first swinging rope anf hang on it and then press Left, Left, Left, Right, Right, Right, Up, up, and Up. If done correctly, you will here a ring sound. Now die over and over until you get a game over, if you have any continues, do not use them, wait for the counter to goes to zero. Now go back to the same save file and this time select act 7 (Mushroom Hill). Go to the first pulley the is right past the dude that throws mushrooms and the Speed shoes box. (Knuckles needs to back track on Sonic's path once you get to the point where they merge) While hanging on it, press Left, Left, Left, Right, Right, Right, Up, Up, and Up. If done correctly, you will here a ring sound. Now die, and hold Y until the level reloads. Press B to confirm that the entire code has been enabled successfully. Get another game over if you wish to change levels. Just make sure to hold down Y when ever a level is loading.
Press up up up down down down left right left right, then hold Y and press start.
At the title screen press up down left right. If done correctly you should hear a ring sound. Now hold Y and press start. You can now choose any stage you want
|level select||Left, Left, left, right right, right, up, up, up, chime, game over, hold Y and press start at title screen.|
Press these buttons at title screen:up+A down+A Left+A Right+A then hold y+b+a keep holding and press start wait till level starts then look at the score if its in hex text that means debug mode is activated press b to use it.Then y cycles different things in the level. And a is regular jump.