Just as an FYI, beginning to look into this:
It's ironic that "Wish" comes from the other game-exclusive (Swirlix), at least as far as non-Safari goes, though it could also be from Togetic apparently (but not Togekiss? Hmm).
What I do not know is if both the Everstone and the Destiny Knot can be in effect at the same time. Even then, if I get the 6IV, I'll need it cloned if I don't have my new toy by then. LOL Worst case scenario, she might have a choice between Relaxed 5IV or the 6IV, but let's see if I can hit lucky sevens here (or is that lucky 31s?).
See what Shinies she's offering if I can hit the jackpot. :)
I've begun by finding a Relaxed male Swirlix. My goal now is to get a Spritzee (any female HA will do, obviously, with better odds than a male) from the Safari and breed it with my Ditto. I'll pop a few Eggs, find a winner for number of IVs and hidden ability, level it up a few levels (maybe Lv.20 is high enough), and repeat. Eventually I'll find a female 5IV to work with. I'll do the same with the Swirlix but including the Everstone instead of the ability (so maybe male wasn't a prerequisite yet) and try to get a 5IV Relaxed male. I'll level the results very high (since Lv.45 is Wish anyway for Swirlix, but Lv.49 is Play Rough so that's a good breed point with Lv.58 far away for the next move) then breed them all night and into morning and afternoon. Gotta see how that goes, but getting a hidden ability, 6IVs, AND a specific nature might very well be the death of me. We'll see. :)