All right then, how about these 8 Pokemon: Staryu (female in a Dive or Heal Ball if possible), Lileep, Anorith (or their respective fossils), Pinsir (female in a Dusk Ball, if possible), any of the Aron family (female in Luxury ball, if possible. The higher evolved, the better.), Mightyena, Clauncher, and Slurpuff (if it can be a male nicknamed Quina, and in a heal ball that'd be awesome. Quiet or any other nature that boosts Special Attack would be greatly appreciated, if you are able to do so. I'm happy to provide a whipped dream to evolve it, if necessary.), + a tradeback for the Xerneas dex entry
for:
the 9 Pokemon you asked for (Vivillion, Noibat, Dedenne, Pancham, Spritzee, Swirlix, Phantump, Barbaracle, and Ivysaur) in Luxury balls with their hidden abilities. I can get females (since I'm guessing you'd like to be able to pass that luxury ball down if you breed them) on all but the Ivysaur. If you want nicknames on any of them, just let me know. Does that sound fair?
And no worries about taking your time, it'll take me some time to get those guys together. ^^