I started working on making a ROM hack called “Sesame Streets of Rage” over 6 months ago. Since then my focus shifted to being able to modify the SOR2 ROM as much as possible.
I’ve conversed with Eskayelle on how he made the modifications that created his ROM hacks. He lead me to a thread where someone by the alias of Sharpnull, wrote a python script with a compression algorithm that mimicked the one used to decrypt various tiles in the ROM. I converted the script into an EXE and built a GUI for it. I also added information on the locations of the compressed tiles. My goal with the tool is to make it easier to modify/replace tiles such as the title and story screens.
SOR2 Compression Utility: https://www.romhacking.net/utilities/1706/
1/27/2023 – I’ve written a ROM editor which allows you to not only replace multiple screens such as the title screen, but also allows ROM text editing and soon you will be able to replace the music!
SOR 2 ROM Editor: https://www.romhacking.net/utilities/1717/