Cloyster @ Leftovers
Relaxed
252 HP / 252 Defense
Ice Beam (Blizzard if Hail team)
Ice Shard
Rest
Sleep Talk
And we have a Garchomp counter! Or at least a Garchomp "buffer".
Dusky works as a "buffer" too.
Dusknoir @ Leftovers
Impish
252 HP/76 Spec. Defence/180 Defence
Ice Punch
Shadow Sneak
Wil-o-Wisp
Pain Split
The bolded moves are the ones that hamper/kill Garchomp. The battle would go like this.
Opponent sent out Starmie (Pick any pokemon)
I send in Dusknoir
A: I predict Garchomp to come in and Use Wil-o-wsip
B: I kill Starmie with Shadow Sneak. And Garchomp comes in.
I use Wil-o-wisp to hamper it, if its Specs/Chain/or anything special I would I punch after that. And for calcs...
0 Attack Dusknoir vrs. 0/0 Garchomp
Damage: 64.43% - 75.91% (Which most likely does not set off any berries Garchomp think it should have)
That seems like nothing but any good player prepared for Garchomp most likely have Stealth Rocks. Which in that case would be
83% max. Which is a near KO after with Shadow Sneak:
13.17% - 15.69%. So ANY damage before hand = KO, and if Garchomp doesn't kill you after the first Shadow Sneak, you Shadow Sneak again. And for those who are thinking "But Garchomp has a good chance to survive" Think about packing another priority move. Ice Shard Mamoswine, Weavile, Lucario of any type.
Calculations: (All are Adamant Garchomps with a 252/252 spread and the Dusknoir mentioned aboved)
Choice Band Dragon Claw:
Damage: 45.58% - 53.40%
Choice Band Outrage:
Damage: 67.69% - 79.93%
Choice Band Earthquake:
Damage: 56.80% - 66.67%
Swords Dance Dragon Claw:
Damage: 56.80% - 66.67%
Swords Dance Outrage:
Damage: 90.14% - 106.12%
Swords Dance Earthquake:
Damage: 60.20% - 70.75%
(Non-Swords Dance/Band Garchomps are not included as damage is squat)
The rare Crunch is the only true way to 1hko Dusknoir.
So what do we see:
1.Garchomp
must have an item to 2hko Dusknoir.
2.Prediction here will kill Garchomp.
3.Garchomp can be defeated by something that is low OU.
And since my Mamoswine killed a Garchomp earlier today...
Mamoswine @ Choice Band
Adamant
252 Attack/Speed
Ice Shard
Stone Edge
Earthquake
Ice Fang
Standard Choice band here always a KO with any of the Ice attacks but...
Damage: 72.30% - 85.04% from an Adamant
CHOICE BAND Garchomp Dragon claw, so even with Stealth Rocks up, Mamoswine can say "Good day Garchomp".
And Garchomp's most feared way to kill, Swords Dance.
Damage: 96.12% - 113.02% Adamant Garchomp's Dragon claw after a Swords Dance.
And with good prediction Mamoswine will switch into a Garchomp's Swords Dance and make that Flygon impersonator flee.