Noivern @ Life Orb
EVs: 252 Sp. Atk, 252 Speed, 4 HP
Nature: Timid/ Modest
-Air Slash/ Hurricane
-Dragon Pulse/ Draco Meteor
-Roost/ Focus Blast/ Psychic
Nice move pool, great speed and decent sp. atk. Lets roll.
Air Slash/ Hurricane depending on whether you're building a rain team. Dragon Pulse for reliable STAB or Draco Meteor for a the power but you'd be forced to switch out. I would personally go for Roost, but maybe Noivern is a bit too frail to be able to use it, so you might want a coverage move like Focus Blast or Psychic.
Infiltrator would be nice to bypass Screens & Substitute, but Frisk can be useful to no end; it'll give you a quick alert to a choice item, Orb, belt, lefties etc. without you having to take a hit, meaning you can use Noivern as a scout and switch out after the Frisk to something more suitable.