No, it does not. I MAY have found it (In Ruvas forest of all places), but I am going to need to check a bit to make sure. I'm also going to try the other boss fights to see what pops up. In the meantime, I'll probably do some of the demons and giant skeletons as I pass them by.
EDIT: I have found and confirmed the palette. Organizing sprites and confirming that I have them all (some of his animations are in a different set of files).
EDIT: I have found and confirmed the palette. Organizing sprites and confirming that I have them all (some of his animations are in a different set of files).