I'm no expert, but I guess an answer is better than nothing, right?
If Pit's graphics are in his FitEntry.pac, I suppose you could get them and replace one of ZSS's graphics. That counts for the lights, at least. As for the feathers, I believe that those are an external graphic effect and are called in PSA (Like the darkness in Ganondorf's entry.) As far as I know, you can't move external graphic effects. You could probably attempt to Port ZSS over Pit (Or wait until BJ finishes THEN import over Pit), but I don't know how well that would go down.
As for the hair, I don't have a clue.
Good luck with that.