After bashing my head and having several drinks, I have a decent-ish split of the level code, and got R11B (Palmtree Panic Act 1 Past) disassembled and buildable, with SonLVL support. It has been pushed into the repository.
Honestly, don't be expecting this to be the most "hack friendly" thing, due to the nature of how the original source code was assembled (tl;dr they copy and pasted a bunch of files per level, and there are weird minute differences between each copy). I am trying my best to make it manageable, and even incorporating things like SonLVL support, but I have my limitations.
It calls a function in the main level V-INT routine that's located towards where the chunks and PLC list is at. You should recognize it from the DMA commands being sent. MMZ2 Present in the USA version has it located at 0x20F8B2.
hey so this an md port of mettalic madness from the proto 712 (only issue it has is the layer swappers because collsion remains the same ) https://github.com/lavagaming1/LavaCdWork-TTZ-Mostly- and this is a link that has tidal tempest in there aswell (its the 2 levels i disasmbilled)