"Main info about this glitch can be find here: https://www.youtube.com/watch?v=hQAVbDfBT4U
I decided to split Spyro 3 into 2 parts so you can watch them separate.
Flight and supercharge works quite differently here. Some dialogs and interact with something/someone disable both of them or flight, but mostly they are pretty fine here and can keep good enough.
Don't ever try to finish inactive section of levels (like defeating thief in Molter Crater) cause you'll softlock yourself and you'll have to either wait 10 minutes or relaunch the game and reactivate the glitch itself. Be careful when you exploring the levels. Note here: you can finish the levels or their subs normally if glitch deactivated during a level (timer IS present) - just lose a life during a section/level and you'll return to your state."