Entry location: Crazy gadget
Go in crazy gadget. After you hit the checkpoint with a chao box behind it, don't touch another checkpoint. When you get to he gravity switch puzzle, make sure you're on a purple platform (do a super bounce jump glitch up the purple wall. To do this do a spindash and do a bounce right when you hit the wall at great speed.) then you should be able to jump under the platform with the goal ring. Go to the back edge under the platform and jump off from there and homing Attack bAck so you hear sonic dying sound. Quickly jump off again and die, and you should touch the ring at the same time. Now here is where you have to time your grab right. When you die and touch the goal ring. Make sure you still have the checkpoint with the chao box. NoW the results screen will pop up while you can move around. Break the chao box and grab the chao key as the level fades out. If done right you will immediately appear in the test level with sonic. No Action replay needed.
Submitted by Sonic heroes guy