Take a sec and go to the part where Yveltal is using his attack. I watched it a couple of times, and I'm pretty sure its a draining attack. As the beam hits, you see something draining from the opponent and then Yveltal getting little 'recovery' sparks you'd see from Giga Drain or something. Whatever that giant red beam of death is, I think it allows him to drain health!
† I am a Christian, and not ashamed to admit it! Copy and paste this if you are too.†
What's better than a Malamar?
A Shiny Malamar!
Vivillion (evolved into Modern pattern...thought Shiny turned into High Plains pattern, but whatever)
Nintendo 3DS FC: 0447 5404 6118
Safari Zone Element: Electric
Emolga, Electabuzz, Zebstrika