go to this page and you will know about debug mode http://www.youtube.com/watch?v=JnupnRq0Wq8 or How to get Debug Mode and Hyper Sonic in Sonic 3 & Knuckles! -note:just go to angel island, you do not need to start a new one, and you can do the debug in 1 player too. and if you cannot do it again...