From a Facebook page about Pokemon
I'm gonna look into the dragon, maybe come up with some info for the 3rd of the trio
So I was right about Yvetal being the Death Pokemon and Xerneas being the Life Pokemon...In Norse Mythology there is an Eagle, a Stag and a Dragon. We have yet to see the dragon, but with the way these trio's play out, it's likely there will be one. The eagle represents death, the stag represents life, and the dragon...well ...I have no idea ..
I'm gonna look into the dragon, maybe come up with some info for the 3rd of the trio