Yveltal

Yveltal fills a unique offensive support role unlike any other restricted Pokemon in the format. Its offensive power is hard to check, as there are not many popular Pokemon that resist Dark-type moves, and it can OHKO bulky Trick Room setters such as Bronzong and Cresselia. Yveltal supports its teammates with just its presence through Dark Aura, which boosts the power of Dark-type moves such as Sucker Punch, or through moves like Snarl. Its typing gives it two immunities, making it easy to fit onto teams. Unfortunately this typing is also Yveltal's biggest weakness, as it makes Yveltal weak to some of the most popular offensive types in VGC16 such as Fairy and Ice, and outside of obscure moves, Yveltal can't hit their users back super effectively. Yveltal is also weak to common spread moves like Dazzling Gleam and doesn't resist Eruption or Water Spout. Occasionally Yveltal's ability can backfire onto its own teammates, since it boosts the foe's Dark-type moves as well. Base 99 is an awkward Speed tier—while it's useful against many of the other slower restricted Pokemon, it isn't good enough to prevent Yveltal from being outsped by other crucial threats.