I've heard somewhere that Xerneas could have been based on the Deers of Yggdrasil. But always when I think about it, I see Xerneas more as Yggdrasil itself, and these Stantlers are the deers.
Personally I like Xerneas more than Yveltal... and in some time it can become my second favourite legendary.
Pokemon belong to Nintendo/Game Freak
This art belongs to Me!