bludz
a waffle is like a pancake with a syrup trap
252 SpA Life Orb Thundurus Thunderbolt vs. +1 252 HP / 252 SpD Mega Slowbro: 229-273 (58.1 - 69.2%) -- guaranteed 2HKOI'm surprised no one has mentioned M-Slowbro. I find this thing to be incredibly hard to deal with, as its defense stat is already high and after 1-2 CMs it can do a surprising amount of damage to anything not named Chansey. The RestTalk/CM set is irritating as hell and is only truly stopped by something like Vaporeon. Furthermore, it can't be killed by Bisharp's Knock Off (no 1.5x item boost) and after a CM even Thundurus fails to do beat it.
+1 4 SpA Mega Slowbro Scald vs. 0 HP / 0 SpD Thundurus: 195-231 (65.2 - 77.2%) -- guaranteed 2HKO
Mega Slowbro is a serious threat but it can't beat Thundurus at +1 when they're both at full HP.
Almost every team I make I'm sure to have a pokemon that can 2HKO this thing though, I agree it's a real handful.
On an unrelated note I think if M-Sableye got banned then M-Metagross definitely would. Personally I think they should both stay - both are great but I don't think either is broken.
Sableye's presence IMO actually does more for it when it's not on the field than when it is. There are enough really powerful attackers that can take it out besides Fairies, and while it does make getting up rocks difficult it isn't impossible. Neutering utility is problematic but it's not gamebreaking since Sableye isn't a safe switch into everything that wants to use a utility move.
Metagross is a beast but it doesn't outpace the most relevant benchmark so at the very least a lot of things have a 50/50 shot to smack it hard. I think the thing that is the most ridiculous about it is its sheer bulk and how difficult it is to revenge. It is pretty staggering that it survives Lando-T's Earthquake at full HP. I think it's more worthy of suspect than Sableye but it is put to a full stop by a few things and has a serious number of common checks.
Slowbro doesn't wall Metagross who run Grass Knot. Also Mega Gyarados can critical hit with Mold Breaker I believe. Agreed on Slowbro being a serious beast but not sure about a suspect test. Double dance is very susceptible to status and CroBro is hard walled by a few things which makes it easier to switch into and out of to deal with it. Taunt is also a nightmare for itI think M-Slowbro is one best pokemon out there, especially now that Greninja is gone. It can easily set up on almost every physical attacker, Bisharp can't 2HKO it because Knock Off doesn't get the boost, and once it's set up it's almost impossible to kill. With Shell Armour you can't crit it to ignore the SpDef boost either. This guy has swept so many teams for me, I feel like it's worthy of a suspect test.
I can't really say much about M-Metagross, since I have M-Slowbro on my team which completely walls it, so my opinion about it is biased.