I decided to make my first post on Retro about a glitch I found in S3&K years ago, I haven't found anybody talking about and it's quite an interesting one. (Least for me.)
I have confirmed the glitch to work on consoles/emulators even compilations such as Mega Collection + etc.
To do the glitch, Grab S3&K, Doesn't matter if it's on real hardware or not.
Go to Angel Island Act 1 and enter the level select code, Upon hearing the chime proceed to the Sound Test like normal, Open Mushroom Hill Act 1 and enter Debug Mode.
Once you have done the above go back to the Sound Test, Load up Launch Base Act 2 with Debug Mode enabled, Select the S monitor and keep putting them up and down until the time reaches "1:80" now proceed to bounce on them all so you catch all the boxes at once and the game will glitch up, The music will continue to play but hitting Start resets the game and that's when the odd thing happens, Instead of S3&K you will now have S&K and none of the S3 levels will work.
I have recorded a video of the glitch in action, Please excuse the poor quality I am currently stuck on a 3G connection and haven't played emulators for years haha.
EDIT: I know "Debug" glitches/issues don't count but felt this should come to light and if staff wish to remove feel free, Thanks.