IMO, I think the best route would be as a pokemon on your party on a new playthrough of X/Y. Since it's going to be missing a lot with the spDef and it can't run chlorophyll nor harvest.
True. Guess I could always keep it for ORAS once those games are released.
I guess if anything, it makes a nice trophy Poke, since you can't really SR for it in XD (forced save before you can view its summary.)