I was looking over Xerneas' profile the other day, when I saw something odd. It didn't have resistance to Death Manipulation, despite tanking it at point blank , and even nullifying it in a small area in the movie (sadly, can't find any scans for this)
Alternatively, in addition for Xerneas performing life hax by glowing its horns, and Yveltal performing death hax by spreading its wings, they also seem to have it passively on contact, according to thesethreepages. Not sure if that's worth notifying of on their profiles, though. But if not, just see it as a sort of a heads-up.