RE: Counter That Pokemon! - Round 6
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Raikou @ Choice Specs
Trait: Pressure
EVs: 252 SpA / 4 SpD / 252 Spe
Nature: Rash (+SpA, -SpD)
-Thunderbolt
-Hidden Power Ice
-Aura Sphere
-Volt Switch
The only move that matters here is Thunderbolt. We can assume either situation here, whether it be Toxic Spikes or Rapid Spin, and Raikou out speeds and OHKOs with Thunderbolt, only allowing Tentacruel to use Rapid Spin once or set one layer of Toxic Spikes.
Thunderbolt to Tentacruel = 110.43 - 130.21 = guaranteed OHKO
Scald to Raikou = 36.76 - 43.92% (.39% chance to 2HKO, but it doesn't matter since we assume Tentacruel uses Rapid Spin or Toxic Spikes on the switch in, so Tentacruel doesn't get a chance to attack anyway)
Also, if we're assuming the opponent has no hazards on their side of the field when making a counter, then what is the point of Tentacruel trying to spin?
Edit: And why didn't Chillarmy get points? I thought Amoonguss was a pretty effective counter.