I've barely bothered much with Sonic Chaos in the past. I remember hiring it when it first came out, managed to finish it with all chaos emeralds and both characters in a matter of hours, and being very disappointed in the short and easy levels and boss fights. I bought the game on Master System for completeness and never really played it again.
I played it again last night, this time on the Game Gear. I was nearing the end and just before I hit the sign post for Electric Egg 2, I decided to hold a Super Peel out / Strike dash just before the signpost, so I could hear the theme song loop through at least once (I was getting through each level in about 30 seconds, without even remembering the level layouts).
After I had held up for 30 seconds while running on the spot, a chime sounded and stars began circling sonic - I had gained invincibility! Charging the Super Peel Out / Strike Dash for 30 seconds makes Sonic invincible. It only last for as long as you keep running after you release the up button, and is a pretty useless manoeuvre as it takes far too long to charge up, but still, I didn't know about this before. I think I found something new.


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