Eevee's Eighth Evolution, Sylveon, Is the Newest Pokémon Announced for “Pokémon X” and “Pokémon Y”!, Game News

Pokémon X and Pokémon Y are planned to release simultaneously worldwide this October.

Sylveon, PokemonLove Wiki

Eeveelution, Pokémon Wiki

Are you ready for Pokémon X and Y? - The Diamondback

Pokémon X & Y Video Confirms Eevee's New Evolution - Interest - Anime News Network

Pokémon Go Gen 6 Pokémon list released so far, and every creature from X and Y's Kalos region listed

Pokémon X & Y Video Confirms Eevee's New Evolution - Interest - Anime News Network

Serebii.net - On this day in 2013, six years ago, Pokémon

A New Evolution of Eevee Announced for Pokémon X and Y - News - Nintendo World Report

Pokemon X Archives - Fuzzy Today

The Kalos Experience : r/pokemon