Hey there, it's THE SuperEgg here. Ok kiddos, let's talk a bit about Sonic 2 proto compressions. S2NA and S2B use the same layout compression and format, which is no compression, and a layout format the same as Sonic 1's. The background and foregrounds are separate files. As far as S2B is concerned, the level art files are compressed as such: Tiles - Nemesis Blocks - uncompressed Chunks - Kosinski I don't remember S2NA off the top of my head, as I haven't touched S2NA in about 2 years, but I assume it's the same. Collisions in S2B is uncompressed. SonLVL does support S2B by extension, but I never released a public LVl file, as I've abandoned the disasm to make a custom engine with it, so I haven't bothered to advance anywhere with it. I suppose I could release a disasm will the the LVL files for it later if there is a big enough call for it. Last note to make, the "improved" disasm doesn't change file type compression for the sake of "byte perfection." It's "improved" because I either reorganized the file names, locations, split more data from the disasm, ect.