I was reading the topic requesting a translation of an article and one of the responses was that Eevee would need to be holding an item (pink bow) and defeat a Pokémon to evolve into Sylveon. I hope Sylveons are female only seeing how feminine it is. It would give another female exclusive evolution more specialty and power.
Also, someone pointed out that the Eeveelution across from each other are strong against/weak to the other complimenting Eevee much like the color wheel has colors opposite of each other directly across.
Yeah get used to it. If you've got a problem with Mickey Mouse you're in the wrong series.-Drizzy_Drizake