Although I really like all this, it's either fake or incomplete seeing as Froakie gets Bounce, Quick Attack, and Extrasensory, as well as the fact that Chespin gets Pin Missile, Vine Whip(Not Bullet Seed), and Headbutt.
It's possible they may have been referencing the move lists of the final forms at the move relearner, which do differ from that of their pre-evos at times.
I'm more inclined to believe it's fake because of how OP the abilities on Delphox and Chestnaught are, though. Those two would be far too good at soaking hits if they actually had abilities like that.