Crobat for B Rank.
It's a fast de-fogger with a good stab in BB.I could talk more about it but it justifys itself.
Please, do talk more about it.
Having good stab in BB doesn't mean anything when your two stabs have horrible coverage together. Hitting four types overall for SE damage from STAB isn't good when you're as weak as Crobat. Just because it's a "fast defogger" doesn't mean it gets its job done. It's far too frail to defog more than once, so you have to guarantee the opponent's hazard setters are all dead and that's never a guarantee. What else does it do besides spam Taunt and U-Turn, use Defog? It's a waste of a defogger when it's so frail that almost anything with neutral coverage that's against it can KO it when it's defogging. It's almost like playing with 5 mons. Almost.
Crobat packs Brave Bird and has a higher attack than Talonflame. Taunt + BB threatens a lot of things, his typing and stats grant him acceptable bulk despite the SR weakness and he's even graced with Roost. Frankly he's far, far better than Noivern, Flying is a better offensive type than Dragon in this meta and unlike Noviern Crobat can spam him STAB without having to worry about it losing power. There is very little that Noivern can do better than Crobat aside from small niches like Trick and revenge killing Dragons. Crobat's STAB also hits most notable Sub users out there right now (baring Kyurem, which I'll admit Noivern is far better against), and those that it doesn't hit SE tend to be specially oriented like Gengar so he'll do more damage anyways. Crobat>Noivern. I'd say B-/B is a solid rank for Crobat, C is FAR too low.
4 Atk Crobat Brave Bird vs. 252 HP / 252+ Def Politoed: 103-123 (26.8 - 32%) -- guaranteed 4HKO
252 Atk Choice Band Talonflame Brave Bird vs. 252 HP / 252+ Def Politoed: 186-219 (48.4 - 57%) -- 90.2% chance to 2HKO
No, you aren't hitting harder when you have to forego a Choice Band and have to give up atk EV's because you're that frail. Show you a calc without a Choice Band? Sure.
252 Atk Life Orb Talonflame Brave Bird vs. 252 HP / 252+ Def Politoed: 161-191 (41.9 - 49.7%) -- guaranteed 3HKO
You aren't hitting harder, and you're frail to the point you're giving up attacking stats as a scout. He doesn't have Roost, you have to use Defog/Taunt/Brave Bird/U-Turn if you want him to do what you're all saying he can do. If he gives up U-turn, he literally is a sitting duck and not this defogging scout he's supposed to be.
Did you just say Dragon is worse than flying
Noivern can spam DM at will. Crobat can't spam BB. There's only two fairies to reasonably worry about and there's a plethora of Steel types for Crobat to worry about (and Noivern to an extent). There's also Gengar, Noivern, just like Talonflame, can also use a Stat-boosting item to hit harder than Crobat. They're also two different types of attackers, and the whole point of Noivern is that he does the role of Infiltrator attacker much better.
Most notable Sub users? Can you give some examples? Most Sub users are Dragons and offensive mons that don't care if you're trying to taunt them because you'll be dead by the end of the turn. I can't even tell what you're saying by telling us Gengar is specially oriented, Gengar doesn't invest anything in bulk besides its last 4 EVs.
252 SpA Choice Specs Noivern Draco Meteor vs. 4 HP / 0 SpD Gengar: 330-388 (125.9 - 148%) -- guaranteed OHKO
252 SpA Life Orb Noivern Draco Meteor vs. 4 HP / 0 SpD Gengar: 286-339 (109.1 - 129.3%) -- guaranteed OHKO
252 SpA Noivern Draco Meteor vs. 4 HP / 0 SpD Gengar: 220-261 (83.9 - 99.6%) -- 75% chance to OHKO after Stealth Rock
4 Atk Crobat Brave Bird vs. 4 HP / 0 Def Gengar: 180-213 (68.7 - 81.2%) -- guaranteed 2HKO after Stealth Rock and Black Sludge recovery
252 Atk Crobat Brave Bird vs. 4 HP / 0 Def Gengar: 231-273 (88.1 - 104.1%) -- guaranteed OHKO after Stealth Rock
That point made no sense when all of Noivern's realistic sets OHKO and Crobat's most common set doesn't. Noivern also has the same natural bulk as Crobat.
If you want to say Crobat is so high, you should probably decide what niche you want him to have (Fast Defogger, Attacker, or Scout) before you shoot out arguments for him.