at the title screen, press:up, down, left, right+A+B+C, a, b and then up. You'll get a
ring sound to confirm the code. Get the level cheat and go to Final Zone. Sonic will then
have a cape and will fly. Press and hold a to fly, and throw fire balls. He will NEVER die
with this code. If you hear the chime, just proceed on. The chime is key. But if you hear
it, theat's fine. ENJOY!!!

Enter the debug code and start the game. Start debugging. Sonic should be invinsible.
However, he could get crushed by a crusher in the final zone and in deep pits anywhere.

fist do the debug mode go to green hill zone and turn into a ring after that create 50
rings then on the last glith is a giant ring then create one. NOTE:you must first finish
the level before touching the ring becuase if you touch it you will be traped there
forever!

debug do control mode then press puase and then a then hold a untill you are in green hill
zone
control mode up c down c left c rhite c at title screen


star lhite zone 3 short way when you see the wooly place where the spiky thing is spin
dash and you will go far
final zone cheat do debug and when egg man trys puting you down go in
 the line
looks like you are floating in debug mode keep doing crazy things and in like a min drop
down you will be runing air
level select up down left rhite a+start
easy way to do green hill zone with no cheat keep doing long jumps

There is another way of doing control mode. This cheat is REALLY simple because when you
do some other cheats (not all of them) you can do control mode. If you do the level select
cheat or the debug mode you actually get control and you won't notice!

Scrap Brain is a not so easy level. However, if you find act 3 really hard there's a
shortcut you can use. When you start SCrap Brain act 3, you'll see a switch. Press it and
you'll see a platform going down. Quickly get off it and you'll arrive somewhere. Then you
can carry on normally and you'll see how quick you were!

Level Select: UP, Down, Left, Right
Debug Mode: Up, C, Down, C, Left, C, Right
2P Mode: X, X, Mode, UP, C, B, A, Down
Play As Knuckles: A, B, X, UP, B
Play As Tails A, B, X, Down, B
Enable Spindash: A, UP, Down, Left, C, Right, X, Z
Spats Replaces Motobug : Z, Z, up, Z, Up, Down, A, B, B, B, Up
Gages Disabled: Up, C, Down, B, Left, A, UP, X
Sega Logos Disabled: A, ,B, C, X, Y, Z, A, Up, Down, A, B, C, X, Y, Z

First you need to activate debug mode.Press start+A. then activate level select.Pick your
level but don't press A!!! press start+A you should be in debug mode.

how I Get it? I'VE TRIED SEVERAL TIMES, BUT I CANT PLAY IN DEBUG MODE, MAYBE ITS A ERROR
WITH THE KEYBOARD. THANKS

If you hold a+b+c during the credits, Sonic will lose his place just like the demo. It
even played the Scrap Brain Zone twice instead of playing the Spring Yard Zone.

level select: up, down, left, right, then hold a an press star and you should be at level
select. 
[NOTE if you here the chine 'the kind you here when you pick up a ring," and then pres
start and hold a, you can use level select.

At the main menu press up, down, left and then right. You should then hear a chime. Hold
'A' (your jump button) and then press 'Start'. You will find yourself in a new menu where
you can access any level and hear the music and sound effects (use enter to play them). I
don't recommend going into the special stage because once you are out you'll end up on the
first level.

At the Title Screen, press the ff. buttons in order:

Up, Down, Left, Right, A+Start

The Level Select screen should show up.

Note: This also works with Sonic the Hedgehog Megamix for the Sega CD