Noi Way Out
Noivern@Life Orb
Timid nature
Infiltrator
252 Sp. Atk/252 Speed/4 HP
~Dragon Pulse/Draco Meteor
~Hurricane
~Fire Blast/Flamethrower/Heat Wave
~Boomburst
Noivern's pretty damn impressive. Respectable Special Attack, and really, really nice Speed. Now, Dragon Pulse is for STAB, as is Hurricane. Draco Meteor can replace Dragon Pulse, but if you intend on keeping Noivern out and dealing damage, it'd kinda be nice to not lower Special Attack every time you want dat Dragon STAB. Fire Blast is for coverage, and can be replaced with Flamethrower if you prefer accuracy over power, or even Heat Wave if you want it somewhere in between (though given that you already got Hurricane, you're already taking that risk with accuracy in the first place). And then we come to Boomburst. Ahh, Boomburst. It's like a Normal-type Overheat without any drawbacks. That one's there for the raw power.
Item is for boosting Noivern's already nice Special Attack. Ability is for bypassing those pesky Substitutes, as well as Light Screen. Well, OK, Boomburst already bypasses Substitute, but you probably prefer all your moves to bypass it if possible, right?
Bat Of Choice
Noivern@Choice Specs
Timid nature
Infiltrator
252 Sp. Atk/252 Speed/4 HP
~Draco Meteor/Dragon Pulse
~Hurricane
~Fire Blast/U-Turn
~Boomburst/U-Turn
A Specs set allowing for potentially even more destruction. This time, Draco Meteor is the STAB Dragon move of choice, since sets of this sort generally involve a ton of switching (though Dragon Pulse is an acceptable substitute if the idea still doesn't appeal to you. Hurricane, Fire Blast, and Boomburst have already been explained previously, though either of the non-STAB moves can be replaced with U-Turn if you like.
Item is for boosting Noivern's already nice Special Attack. Ability I already covered.
A Noi-ing
Noivern@Sitrus Berry
Jolly nature
Infiltrator
252 Attack/252 Speed/4 HP
~Hone Claws
~Dragon Claw
~Acrobatics
~Wild Charge/Shadow Claw/Iron Tail
Noivern's Attack isn't too shabby, so a Hone Claws set could easily take opponents by surprise and still do fairly well. Dragon Claw and Acrobatics are your STAB moves of choice here, the latter becoming especially useful once Noivern takes enough damage to consume that Sitrus Berry. The last move's your call. Wild Charge and Shadow Claw both have potential to be nice coverage moves, and Iron Tail can be especially useful against those pesky Fairy-types. It even benefits from Hone Claws's accuracy buff.
Item is for powering up Acrobatics and possibly healing up some Wild Charge recoil. Ability I already covered.
Other options:
*If Hurricane's accuracy bothers you, it learns Air Slash, but... it just isn't the same.
*Shadow Ball and Focus Blast have unresisted coverage together, but good luck finding room to squeeze both moves in a single moveset.
*Switcheroo is an interesting option for the Specs set.
Abilities:
*Frisk: When Noivern is sent out, its Trainer is alerted to the opposing Pokémon's held item. It's not a bad Ability by any means- knowing exactly what item the opponent holds can give you an advantage- but it still pales in comparison to...
*Infiltrator: Noivern's attacks bypass opposing Reflects, Light Screens, Mists, Safeguards, and Substitutes, the latter of which was first discovered by yours truly, and with a Noibat, no less! Wha- I said that last week? Oh, yeah. Anyway, the best Ability for Noivern, hands down. Bypassing them Substitutes is always a big plus.
*Telepathy: Noivern's Hidden Ability. Noivern is immune to attacks used by allies in double, triple, and horde battles. Kinda underwhelming, IMO. Even with my lack of talent for doubles and triples, one doesn't need to be an expert in those formats to know that Noivern is already immune to Earthquake, probably the biggest offender in that regard. And that leaves what? Boomburst? What the hell else besides Noivern even gets Boomburst that you're likely to use, especially on the same team as a Noivern? Discharge? The only reason to use that move is to activate an ally's Motor Drive or Lightning Rod! OK, maybe in Triples it'd be useful for that, but still! My point still stands- Telepathy is exceptionally situational for Noivern. Smart thing to do would be to just stick with Infiltrator.
Partners:
Noivern appreciates Rapid Spin/Defog support, particularly the Specs set.
Counters:
Ice. Awesome though Noivern is, it suffers from a common ailment of Dragon-types known as a big-*** weakness to Ice. An Ice Shard from something with the Attack to back it up will put a serious dent in Noivern. And Fairy-types are also something to watch out for. Not so much Mawile or Klefki, as any Fire move can deal with those, but Mega Gardevoir, between the high Special Defense and the STAB Pixilate Hyper Voice, it's... not something a Noivern likes to go up against. Unless it's the Hone Claws set with Iron Tail, in which case, bring on the Fairy-types!
Opinion:
Noivern is... well, it's awesome. I would've used one in my in-game team in Y, only I learned just how late in the game Noibat becomes available.
Prediction for next week:
Swoobat. Noivern makes two bats in a row, they might as well make it three.