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Sonic 3 & Knuckles

Codes

Level Select for Sonic 3 and Knuckles

In the first Zone first Act (Angel Island). When hanging on one of the swinging vines at the beginning, hit: Left, Left, Left, Right, Right, Right, Up, Up, Up. You will hear a ring notice. Pause and hit "A" to rest, at the title choose Sound Test.

EffectCode
Left, Left, Left, Right, Right, Right, Up, Up, UpLevel Select

Contributed By: askg7.

Sonic & Knuckles Cheats

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.

EffectCode
Left, Left, Left, Right, Right, Right, Up, Up, UpDebug mode

Contributed By: askg7.

Level select when locked onto Sonic 2

EffectCode
At 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 StartLevel select when locked onto Sonic 2

Contributed By: Mysterious_Bob.

Glitches

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.

Contributed By: Flame060.

Sonic the Hedgehog 3 Cheats

Codes

Level Select

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.

Contributed By: Houston_dude.

Sprite Show

Enter the following code in any stage while Debug Mode is entered

EffectCode
Hold B and press CYour character will show you all of his sprite animations
Hold B and press C againYour character will stop the sprite show if it is activated

Contributed By: Numbuh 128bit.

Glitches

Sonic and Knuckles Mini-Boss Music

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).

Contributed By: GregHead.

Walk Thru Walls

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.

Contributed By: havac.

Secrets

100000 Points

Manage to beat a stage at with your time at exactly 9:59 and you'll net yourself an easy 100000 points.

Contributed By: Juggling Joker.

All 7 Chaos Emeralds &amp; Super Sonic

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.

Contributed By: Shy Ranger.

Frame by frame

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.

Contributed By: Flame060.

Hidden Special Stage

On the level select menu, play sounds 01, 03, 05, 07. Highlight Special Stage 2 and press A + Start.

Contributed By: hivebrain.

Infinite Lives

Get up to Launch Base Zone. Sound any of the alarms, so that the Kamikaze birds come after you. Charge up a Super Sonic Dash in between the alarm, but do not let go of the button. The birds will continually crash into you. After about 30 seconds, you will have gained enough points to get an extra life. Continue the process for as many lives as you want.

Contributed By: stonedwal.

Play as Knuckles

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.

Contributed By: Wario_man.

Slow motion mode.

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.

Contributed By: CalmG.