"I was trying to get in the mind of an ancient pokemon." Bill explained." Hearing his Bill's voice, a swarm of quadrupedal pokemon came running. He said these were all of the members of Eevee's family, including the newly discovered form, Sylveon.

[i]Eevee, the Evolution Pokemon.Thanks to its unstable genetic makeup, this special Pokémon conceals many different possible evolutions.

Vaporeon, the Bubble Jet Pokemon and an evolved form of Eevee.It has evolved to be suitable for an aquatic life. It can invisibly melt away into water.It prefers beautiful shores.

Flareon, the Flame Pokemon and an evolved form of Eevee. It has a flame bag inside its body. After inhaling deeply, it blows out flames of nearly 3,000 degrees Fahrenheit.

Jolteon, the Lightning Pokemon and an evolved form of Eevee. Every hair on its body starts to stand sharply on end if it becomes charged with electricity.It accumulates negative ions in the atmosphere to blast out 10,000-volt lightning bolts.

Espeon, the Sun Pokemon and an evolved form of Eevee. Its fur is so sensitive, it can feel minute shifts in the air and predict the weather...and its foes' thoughts.

Umbreon, the Moonlight Pokemon and an evolved form of Eevee. The light of the moon changed Eevee's genetic structure. It lurks in darkness for prey.When exposed to the moon's aura, the rings on its body glow faintly and it's filled with a mysterious power.

Glaceon, Fresh Snow Pokemon and an evolved form of Eevee. By controlling its body heat, it can freeze the atmosphere around it to make a diamond-dust flurry. It lowers its body heat to freeze its fur. The hairs then become like needles it can fire. 

Leafeon, the Verdant Pokemon and an evolved form, of Eevee. When you see Leafeon asleep in a patch of sunshine, you'll know it is using photosynthesis to produce clean air. As a result, it is always enveloped in clear air.

Sylveon, the Intertwining Pokemon and Eevee's final possible evolution. It sends a soothing aura from its ribbonlike feelers to calm fights.It will also wrap its ribbonlike feelers around the arm of its beloved Trainer and walks with them.[/i] 

He mentioned that a friend of his named Cassius sent him Sylveon from the far off Kalos region, knowing he would like it.