Or you could just have a special based Toxicroak or Lucario Vacuum Wave it into oblivion. Both of which who regularly can and will run them.You need bulky Pokemon who can do something back who are not weak to Ice or Water attacks, so Hippowdown will not cut it.
As for surviving priority, max Atk Adamant Scizor's Bullet Punch only deals 53.9-63.5% to this Cloyster at -1, which will only ever KO after SR and two hits of Life Orb recoil.
What? According to my calculations, technician choice Band Breloom should OHKO it with mach punch after shell break and steal rocks. Actually, it can potentially do so without choice band, with a good damage roll.Priority is not as good a check for Cloyster as you seem to think. Using 140 HP, 0 DEF EVs (standard life orb for 4th gen), -1 defense after shell break, taking Stealth Rocks into effect, a Choice Band Technician Bullet Punch from Scizor is a solid 2HKO. This is using an outdatted and inappropraite sprad, and even more with White Herb taken into account, it becomes even less of a problem. Technician Choice Band Breloom does even less.
Not as much as you might think, if Cloyster doesn't carry Rock Blast. Both Ditto and the real Cloyster would be forced to wear each other down via shell blade, and the real cloyster might even be able to boost further via additional shell breaks (though probably no more than one). Then Cloyster is hitting first, and significantly harder - and if it has leftovers instead of life orb, then it's only losing at absolute max 14% HP per turn, if ditto gets perfect damage rolls. This increases to 23% HP per turn, if ditto is getting max damage rolls, after the second shell break. Meanwhile, Cloyster does well over a third of Ditto's HP in one hit. Keep in mind that Ditto has actually even less HP than Cloyster, taking into account the 120 HP EVs that you mentioned....
Ditto is also a good choice, but then again, its Ditto, what doesn't it check.
As I said on the previous page anything scarfed with 319 speed can outspeed Cloyster after a Shell Break. Any special attack will pretty much kill it. Or any SE physical attack.
Alakazam with Magic Guard and sash can revenge kill Cloyster.
Icicle Spear would rip through Sash after it activates once, right? Otherwise, anything + Sash would venge on Cloy.Alakazam with Magic Guard and sash can revenge kill Cloyster.
Assuming adamant Cloyster that's +Speed SCARFED base 100+ or neutral SCARFED base 110+.
IMO, that's a pretty high water mark esp. considering that a number of those would-be revenge killers are either frail or weak to ice and thus doomed if Cloyster's packing Ice Shard.
So obviously, powerful/fast attacks can kill it but the attacker has to, well, not die first.
According to Serebii over 100 Pokemon have over 319 maximum speed so there's plenty of selection. Of course Cloyster could have Ice Shard, but then it has to sacrifice rock or water coverage. If anything it shows Cloyster can't cover everything at once, and so is more than counterable =)
Okay. Literally. The. Best. Pokemon. This. Generation.
My friend did some damage calcs. OHKOes 4 HP Arceus after 1 Shell Break with Icicle Spear. What is this? 252 HP Kyogre takes 63.1% - 74.3% from it. This is the best Pokemon this Generation. I have been excited about many new Pokemon this Generation, but seriously. Cloyster = best Pokemon in the world.
And for Gorebyss, sure it will outspeed everything in rain, but don't forget about Rayquaza's Air Lock and Groudon's Drought, they render Rain useless with the former having ExtremeSpeed and the latter reducing the damage of water moves with Sun.
Aren't Empoleon and Poliwrath enough of a reason to carry HP Electric?
Since there isn't a single Pokemon in the game that can realistically be expected to counter all 491 other Pokemon in the game, two, unless they're pretty much mandatory for a good team (which Empoleon and Poliwrath are not) are not worth sacrificing coverage (and STAB at that, since Hydro Pump is probably more expendable than Rock Blast).Correct me if I'm wrong but unless Cloyster has HP Fightning/Ground/Electric the only reliable counter (as, it can safely switch in) seems Empoleon since it resists Cloyster's entire movepool including 4x resistance to Icicle Spear.
Aren't Empoleon and Poliwrath enough of a reason to carry HP Electric?