To get a Sylveon, you must max out all three stats (Affection, Fullness, and Enjoyment) for an Eevee to evolve it into a Sylveon. To max out all stats for an Eevee, keep petting it and playing the mini-games. It should take approximately one hour to max out all the stats for the Eevee using this method. Note: Make sure to teach the Eevee a Fairy move before leveling it into the Sylveon.