I've been looking for a Ditto like the ones you mentioned ever since I finished the game back last December. I still haven't obtained one because no one's been willing to trade me one (with good reason) and I don't have access to a Normal Type Safari Zone. I gave up on it, but I know I can breed many of my Kalos pokemon with the flawless-near Pokemon I transferred over from 5th Gen. I bred the Goomy fairly quickly with one of my Modest Kingdras, and my Noibat with my Staraptor. Now I'm on the lookout for a Super-Sized Pumpkaboo to breed with my Gengar, but for a super sized pumpkin those things sure are hard to find -_-...
Oh yeah, when you're finally done breeding the Honedge, could you give her the nickname Joan d'Arc? Kind of weird that I'd want to end up with a female Aegislash, but I like keeping a good ratio of male and female Pokemon. Besides, I don't see how the heck a sword and shield can even have a gender O_o...