@Cesterp CB Crobat 2HKO's standard 252HP Porygon2 after Stealth Rock. If that's not power, I don't know what is. Weaker bulky waters like Milotic are also 2HKO'd, and if your max defense Suicune is even slightly weakened, it will be as well. If you are listing Scarf Pokemon as stops to a sweep, you might as well say Heracross or Raikou suck because they lose to the very scarfers mentioned. If a team is even slightly weakened, Crobat will sweep thanks to it's immense speed, and that speed means that it is very difficult to switch into, because things like Zapdos, which would be able to counter if it were faster, are 2HKO'd after SR. Things that do outspeed it or have priority, like Scarf Flygon, Darmanitan, Ice Shard Weaville, etc. cannot switch in because they get decimated by BB- 82% chance to OHKO Flygon after SR. Crobat, like any other, does have its counters, and it cannot outright sweep a lot of the time, except the fact that it checks a lot of the tier more than makes up for that. Crobat is solid both defensively and offensively at the same time, and I don't think much else in the tier can boast that. Definitely S-tier.
I don't like Cofagrius in S-tier, simply because it requires so much time to set up, is vulnerable to Taunt and status, is easily worn down, and lacks a lot of power even at +2, but it is the best Ghost in the tier (well depends on what you're looking for), so I don't really mind. I'm just saying it doesn't really match the definition of an S-tier pokemon imo.
Zapdos- S-tier. It's defensive sets have been placed under question, and since they are the reason why Zapdos has been called versatile and therefore S-tier, I will give my experiences of using defensive Zapdos. Zapdos has been absolutely solid, if there was anything I was not sure about, Zapdos would come in, and would be able to deal with the threat without many problems thanks to Roar and reasonably powerful Thunderbolts. These Thunderbolts have a 100% chance of OHKO'ing Tornadus (a big threat that Zapdos counters like crazy) without SR, and when combined with Heat Wave or a HP of your choice, mean that Zapdos can be a resilient attacker that is capable of checking various pokemon with ease. It is like a catch-all pokemon on my stall team, and its natural offensive power and speed make it very valuable. On a stall team without Roserade, its ability to force out bulky waters make it very valuable-especially when combating Blastoise, and with HP Flying, you can do the same with Hitmontop, Roserade, Shaymin, and Heracross. Having something that can take on the 2 most common spinners and the most common spiker both offensively and defensively is rather valuable for a stall team no? Other threats it takes on are Cobalion (with Iron Head), Yanmega, Togekiss, Virizion, Xatu, and Earthquake users. Now these all apply to a stall team, but it is actually better for balanced teams. It can check a wide variety of threats previously mentioned, but its greatest boon is the ability to take hits, hit back hard, and recover any health lost. Rather than look at what Zapdos can't do, look at what it can do. Zapdos isn't supposed to be countering Ambipom or Flygon, and if you are staying in on Heracross's Stone Edge I don't know what to say. Being immune to Spikes and resisting Fighting, Bug, and Grass makes up for an SR weakness. Zapdos is not a wall - think of Crobat, just that it checks different things and has different typing and stats. Offensively, Zapdos CAN sweep without much support. Its stats, coverage, and typing are all extremely solid, and the amount of Swampert and Rhyperior I have killed with HP Grass is unbelievable. The ability to lure them out is not only great for Zapdos's sweeping ability, but it also means Zapdos can support Raikou. The only thing Zapdos needs help with is with special walls, and any attacker needs help with walls, so that doesn't really apply.
Slowking and Esca are B-tier. Reasoning- they are *insert definition of a B-tier pokemon*. Don't know how else to put it lol. Ditto should fall under C-tier, since it cannot consistently execute its strategy, and even when it does, it is easily stopped in turn, and is just not very threatening. Porygon2 and Weaville are definitely A-tier. Porygon2 is a powerful defensive threat thanks to Eviolite and Trace, and if you don't have a way to break through it, you just lost the game. Offensively, it has great coverage and is rarely set up bait. If you aren't sure about something, switch in Porygon2 and it will do its job. Porygon2 isn't the only true counter to Chandelure, and actually isn't a true counter-it only is if Chandelure is running Flash Fire. I've used and faced Weaville before, and nothing stops this guy other than scarfers and priority. Not even SR is good enough because Weaville isn't supposed to be taking hits anyway. What it does is check sweepers with Ice Shard and sweep with everything else. It's coverage is fantastic, and means it can break through common physical walls like Gligar and Slowbro. That is something that not much else can boast, and Weaville would be S-tier if it weren't so terrible defensively.
Qwilfish should be at least B-tier. It walls physical Fire-types like many other Bulky Waters, but it also takes on Fighting-types like nothing. That means Qwilfish is not outclassed. These two types these two are found on nearly every team, so Qwilfish will be able to consistently execute its strategy- Spikes + Thunder Wave. Pain Split means Qwilfish is not easily worn down. Even as a spiker, Qwilfish is unique in UU because it resists Fire and has completely different resistances and is physically defensive. Thanks to Tornadus, Qwilfish can pose a powerful offensive threat with SD and Swift Swim, or even an offensive spiker that doesn't lose momentum with Explosion. All of these reasons mean Qwilfish at the very least does not fit the definition of a C-tier, but is also unique, multi-dimensional, and is consistent.
As a BL2 Pokemon (and therefore UU), I think Cresselia should be on this list somewhere? I've never really used it, so I don't think I'm going to really comment on its placement.
Ok, that was really long, but I've been wanting to post for some time now but never really had the time to.
