lol that's a bit too muchChespin/Quilladin, to complete my shiny Kalos starter trio. It can be any gender, either ability, any nature that doesn't reduce Attack, and any IVs that are not 0 value. And nameable!
But there are other shiny Pokemon I have in mind, like Honedge, Goomy, female Espurr, Spritzee and Noibat. Similar rules apply to these guys: any nature that doesn't hurt their best stats, any ability, no 0 IVs, any gender and nameable.
But don't be afraid to make an offer of your own.