yes it does
Buzzwole @ Rocky Helmet
Ability: Beast Boost
EVs: 152 HP / 168 Atk / 188 Spe
Adamant Nature
- Roost
- Ice Punch
- Earthquake
- Close Combat
Does this even need an explanation?
click insert, then spoiler, then type the spoiler name. put the spoilers between the opening and closing tags
Barraskewda @ Choice Band
Ability: Swift Swim
EVs: 252 Atk / 152 Def / 104 Spe
Adamant Nature
- Ice Fang
- Liquidation
- Flip Turn
- Close Combat
Barraskewda?! A rain team?! WEATHER?!
While Barraskewda can't really take hits well, it does a good amount of damage to this team!
Even out of weather, it can easily run enough speed to outrun Garchomp, like my set shows above.
Also please, if you can, bring in the fish with a slow pivot. It CAN switch in to a Chomp eq, but does it really want to? No.
Against Garchomp:
252 Atk Garchomp Earthquake vs. 0 HP / 152 Def Barraskewda: 199-235 (75.6 - 89.3%) -- 12.5% chance to OHKO after Stealth Rock
(Enough Defense investment to not sacrifice power but barely survive an eq (if lucky enough))
252+ Atk Choice Band Barraskewda Ice Fang vs. 0 HP / 0 Def Garchomp: 472-556 (132.2 - 155.7%) -- guaranteed OHKO
nothing new here
252+ Atk Choice Band Barraskewda Liquidation vs. 0 HP / 0 Def Garchomp: 229-271 (64.1 - 75.9%) -- guaranteed 2HKO after Leftovers recovery
if they try to switch in
252+ Atk Choice Band Barraskewda Close Combat vs. 0 HP / 0 Def Garchomp: 216-255 (60.5 - 71.4%) -- guaranteed 2HKO after Leftovers recovery
if they try to switch in
252+ Atk Choice Band Barraskewda Liquidation vs. 0 HP / 0 Def Garchomp in Rain: 345-406 (96.6 - 113.7%) -- 81.3% chance to OHKO
there's also this!
If you're lucky with your eq roll, barraskewda really likes its matchup against Chomp!
Against Melmetal:
252+ Atk Choice Band Barraskewda Flip Turn vs. 40 HP / 0 Def Melmetal: 114-135 (27 - 32%) -- 42.8% chance to 4HKO after Leftovers recovery
252+ Atk Choice Band Barraskewda Liquidation vs. 40 HP / 0 Def Melmetal in Rain: 241-285 (57.2 - 67.6%) -- guaranteed 2HKO after Leftovers recovery
252+ Atk Choice Band Barraskewda Close Combat vs. 40 HP / 0 Def Melmetal: 304-358 (72.2 - 85%) -- guaranteed 2HKO after Leftovers recovery
While Melmetal really likes its matchup against skewda (living a CC, not taking much damage from a normal weather Flip Turn, basically heals all Ice Fang damage with Leftovers.) It will not EVER switch in. Even just one Flip Turn will put it in CC range. Don't forget that Liquidation in Rain 2hko's!
how do you work spoilers :P
Threats of the Round 
With its great bulk, fantastic Water Electric typing, Levitate and access to Will-O-Wisp, Rotom-Wash is well poised to be an absolute nightmare for Melmetal and Garchomp to face, especially with the provided sets which lack Toxic on the former and Scale Shot on the latter. The only issue is that Pain Split is not the most reliable form of recovery, but, other than that, there's not much Melmetal and Garchomp can do. Even if Garchomp had Scale Shot, it would need to get lucky in order to KO Rotom-Wash and avoid Will-O-Wisp, while any Melmetal lacking Toxic and/or Superpower would need to predict really well not to give away free turns for Volt Switches or Will-O-Wisps.
Thanks to its massive physical bulk and uniquely annoying typing, Buzzwole is a blanket check to 99% of OU's physical attackers and these two are no exceptions. Melmetal can reliably 2HKO with Double Iron Bash, but gets punished heavily by Rocky Helmet and is also slower than Buzzwole, which means the latter can Roost stall its PP and its health out. Plus, it packs superrective STAB Close Combat and even Earthquake to avoid Defense drops. As for Garchomp, a Ground resistance and access to Ice Punch gives no hope to any land shark lacking Draco Meteor, Fire Blast or Aerial Ace.
After letting his cousin enjoy some time in the spotlights, Slowbro has unceremoniously overtaken Slowking for months now and its assets against cores like this one is exactly why it has skyrocketed in relevance and viability. Resistance to Steel, gargantuan bulk, frustrating longevity between Slack Off and Regenerator and, obviously, access to the 100% burn inducing Scald give Melmetal and Garchomp nightmares when they see this pink ...thing on team preview. Only Melmetal's Thunder Punch grabs Slowbro's attention as every other attack just bounces right off and even then, Slowbro is relentlessly punishing it with Rocky Helmet and threatening a Scald burn, only to heal most of the damage off just by switching out.
Additional Notes 
Urshifu has trouble switching in, but it's the only Pokémon that can make Protect Melmetal regret its life choiced thanks to Unseen Fist and its STAB Close Combat, one of the few physical attacks capable of outright KOing Melmetal. Being slower than Garchomp and needing either a Defense drop or 3 hits from Rough Skin to severely damage Garchomp will quickly put it in range of its Earthquake, as Ice Punch isn't at all a reliable move to use on Choice Band Urshifu.
This monster never fails to pop up in these analysis as it's just way too powerful to not be threatening against any remotely offensive core. Being faster than both of them and capable of OHKOing both at +2 (only needing minor chip damage against Melmetal) greatly helps, especially when it doesn't really have any issues grabbing a boost in a pinch, although this depends on Melmetal's and Garchomp's coverage choices. Also, despite having great Defense and even Leftovers, Kartana can't reliably switch into either.
Mamoswine definitely can't switch into Melmetal and takes a huge chunk from Earthquake and Aqua Tail and isn't the most viable Pokémon to begin with. That being said, a Life Orb Mamoswine is capable of unleashing disrespectful levels of destruction thanks to its powerful STABs obliterating both Melmetal and Garchomp without much issues. A Choice Band variant needs good prediction and positioning, but can be just as much devastating.
Round 21: Calm Mind Clefable + Ferrothorn 
@ Heavy-Duty Boots
Threats of the Round 
With STAB Sludge Wave and access to Flamethrower backed by Sheer Force and recoil-free Life Orb, it’s no surprise that Nidoking is an absolute menace to this core, being the only Pokémon that can OHKO both Clefable and Ferrothorn comfortably and in succession. It can’t switch into Ferrothorn reliably at all, but with its Ground Poison typing it can use Clefable as an entry to wreak havoc on the opponent’s defensive core. Life Orb Moonblast is a mere 4HKO and while its Special Attack drop is annoying, a -1 Nidoking is still tricky to switch into due to its supereffective coverage.
Volcarona typically uses Pokémon like Clefable and Ferrothorn for setup opportunities by forcing them to switch out. However, thanks to Substitute, it can also risk staying in on both and setting up as Thunder has unreliable accuracy and Ferrothorn can’t break its Substitute. From there, Volcarona can proceed to setup Quiver Dances almost uncontested and will always beat Clefable 1v1 due to Flamethrower outdamaging Moonblast and Thunder. Speaking of Thunder, it’s the only move that Volcarona needs to be wary of, as with Life Orb it can break the Substitute and threaten a nasty 30% paralysis which a Roost-less Volcarona really dislikes.
Despite hating Thunder’s paralysis and not really switching into either unless its Air Balloon isn’t needed, Offensive Heatran has the ability and typing to easily break this core. Magma Storm obviously melts Ferrothorn and can be used alongside Heavy Slam to trap and defeat Calm Mind Clefable trying to use it as setup fodder in a pinch. It should be noted that a Modest Heavy Slam is not a guaranteed 2HKO, but its more than enough to force Clefable into Softboiled and into being at the mercy of a critical hit. Additional Notes Once again, Kartana has a very positive matchup against this core, as it only needs a Swords Dance to cleanly OHKO both members and acquiring that boost isn’t particularly difficult against Ferrothorn. Setting up against Clefable isn’t nearly as safe, though, as Moonblast deals enough damage for Kartana’s own Life Orb and Ferrothorn’s Iron Barbs to finish Kartana off in a couple turns of good prediction, with Ferrothorn taking Leaf Blades and Clefable taking Sacred Swords.
While switching into Ferrothorn is a scary proposition due to Knock Off being particularly bad for Assault Vest Slowking-G, STAB Sludge Bomb and Flamethrower are still extremely powerful against this core even though they fail to OHKO either. While its typing and bulk will give it the upper hand against Calm Mind Clefable, paralysis and Special Attack drops can turn this matchup on its head with just a bit of luck.
While Life Orb Calm Mind is an extremely aggressive and overall bad set, the fact that its Choice Specs set was acknowledged as well is enough for it to deserve spotlight. With its powerful Fire STABs and even Trick, it has the tools to easily dismantle this core. That being said, Blacephalon is extremely frail and doesn’t like switching into either at all, so it requires extremely good prediction or some pivoting to be put in an advantageous position.
Choice Specs Volcanion + Swords Dance Weavile 
Rotom-Wash just stays in. 
Volcanion doesn't want to switch into this thing and risk a 2HKO Volt Switch or paralysis. 
Weavile also doesn't want to switch into this thing and risk a 2HKO Hydro Pump, paralysis, or burn. What's more is that Rotom-Wash can lure a Sludge Bomb from Volcanion and Volt Switch into a Steel teammate like Kartana, 
Bisharp, or 
Scizor, forcing it out and allowing a free turn for setting up. Washing Machine pops in every now and then to cripple them and pivot out.
