Get an Eevee with a Fairy type move and go to Pokemon Amie. For it to evolve into Sylveon, it must level up while having 2 hearts in Amie affection. You can get them by STUFFING THE LITTLE CATFOX THING WITH PUFFS until it won't eat any more. Then play a minigame so it can "digest". Then you can stuff it with more puffs. Three cycles of this in I had two hearts, I leveled up, and boom, level 2 Sylveon. (:
Good luck yall!