A few previews to show off the fusion code I've been messing with (it will require this mod and doesn't have any references to other mods so hopefully it'll be bug free) I have fallbacks in place for palettes not yet complete, and ways to guarantee recoloring of the fused sprite based on the 2 forms used. I haven't yet figured out how to implement the sparkle regions properly still working on that.
https://youtu.be/MKFPg47Qnxw