Soareon is the Flying- and Steel- type Eeveelution. There are no known pictures taken. Soar is to fly.
Evolution is quite complicated for Soareon. Take an Eevee to Johto, Hoenn, or Sinnoh, holding any type of Shimmerstone, and have another one of your Pokemon use Flash Cannon on it. Then it should evolve.
Kanto, Hoenn, Fiore, or Sinnoh, usually found on mountaintops. Soareon is very rare. For every 116 Delibird, there are 4 Soareon. This is shocking, since Delibird is rare. The famous trainer Alex owns one.