Imma nominating this Palkia set as a check.
Name : Palkia
Status :
Check
Palkia @ Assault Vest
Ability: Pressure
EVs: 252 Atk / 4 SpA / 252 Spe
Hasty Nature
- Aqua Tail
- Spacial Rend
- Outrage
- Fire Blast / Thunder
Bringing back the Physically-based Mix Attacker from DP, except I slapped on an Assault Vest to take Kyogre's hits much more efficiently. Even with Kyogre at +1, Palkia has a good chance of surviving 2 hits
+1 252+ SpA Primal Kyogre Blizzard/Thunder vs. 0 HP / 0 SpD Assault Vest Palkia: 144-170 (44.8 - 52.9%) -- 28.1% chance to 2HKO
Whilst Palkia nets a guaranteed 2HKO with Outrage
252 Atk Palkia Outrage vs. 180 HP / 0 Def Kyogre: 204-240 (52.8 - 62.1%) -- guaranteed 2HKO
You can run 80 HP EVs or 72 Sp. Def. EVs to avoid the 2HKO from +1 Primal Kyogre without Stealth Rocks. With Stealth Rocks you'll need to put in either 240 Sp. Def EVs to avoid the 2HKO or put 252 in HP to reduce the chance of 2HKO to 2.3%. Also, if necessary, you can opt to run Gentle instead of Hasty, because Palkia will speed creep Kyogre without any Spd investment of 236 vs. 235. In that case, 120 Sp. Def from Gentle Nature will avoid the 2HKO with Stealth Rocks, or 136 HP EVs to avoid the 2HKO with Stealth Rocks. Without Stealth Rocks, no investment is needed on HP or Sp. Def. Also, another thing to note is you only need 188 Atk EVs to 2HKO Primal Kyogre, allowing more room for EV Distribution. With Stealth Rocks, you can net the 2HKO on Primal Kyogre with only 20 Atk EVs. Whatever floats your boat when it comes to EV distribution.
+1 252+ SpA Primal Kyogre Blizzard/Thunder vs. 136 HP / 0+ SpD Assault Vest Palkia: 131-155 (36.9 - 43.6%) -- guaranteed 3HKO after Stealth Rock
20 Atk Palkia Outrage vs. 180 HP / 0 Def Kyogre: 169-199 (43.7 - 51.5%) -- guaranteed 2HKO after Stealth Rock
+1 252+ SpA Primal Kyogre Thunder/Blizzard vs. 0 HP / 120+ SpD Assault Vest Palkia: 119-140 (37 - 43.6%) -- guaranteed 3HKO after Stealth Rock
188 Atk Palkia Outrage vs. 180 HP / 0 Def Kyogre: 193-228 (50 - 59%) -- guaranteed 2HKO
+1 252+ SpA Primal Kyogre Blizzard/Thunder vs. 0 HP / 0+ SpD Assault Vest Palkia: 131-155 (40.8 - 48.2%) -- guaranteed 3HKO
So I guess an effective Counter for just Kyogre would have an EV distribution of
188 Atk EVs
252 Sp. Def EVs
64 HP EVs
with a Gentle Nature as this will allow avoiding of the 2HKO from +2 Kyogre and net a 2HKO in return without Stealth Rocks.
+2 252+ SpA Primal Kyogre Blizzard/Thunder vs. 64 HP / 252+ SpD Assault Vest Palkia: 142-168 (42.1 - 49.8%) -- guaranteed 3HKO
The extra 6 EVs can be put into Sp. Atk. This EV distribution is for absolute Kyogre Counter with Palkia. I just prefer the initial spread of 252 Atk / 6 Sp. Atk. / 252 Spd with Hasty to make Palkia viable as well. So the Counter for Primal Kyogre would go like this:
Name : Palkia
Status :
Counter
Palkia @ Assault Vest
Ability: Pressure
EVs: 64 HP / 188 Atk / 4 SpA / 252 Sp. Def
Gentle Nature
- Aqua Tail
- Spacial Rend
- Outrage
- Fire Blast / Thunder
Shoutout to Sparkblade for notable changes