So, I'm getting really far with Sonic 2 DX! I have been releasing a few closed betas now, and I'm pretty satisfied with what has been done. Mr. Cat even helped with the data overflow issue with editing Aqua Lake since it shared a bank with Crysyal Egg. Now, we have a few new issues. In Crystal Egg, if the fish Badnik (a flying Chopper) is edited, it causes the entirety of Act 1 & 2 to vanish from existence. All are gone, and said levels don't load. I presume it's some kinda memory overflow the compiler didn't catch. Here are the sprites in question: The older sprite for Bubbler's Mother, however, does not cause this issue: The new one must take up too much data by being too detailed, but how can it be fixed so I can use the better one? Also, this thread will double as a way to track progress and get community input on various stuff.