Sweep told me that Thunder Wave + 3 Attacks Primal Kyogre will be a decent set. Waterfall flinch with paralysis owns CM Arceus too. No Latias for now, but Waterfall 3HKOes it. Support Arceus can't burn Primal Kyogre, that is useful. No more Sacred Fire burns but Brave Bird 2HKOes Kyogre :(
252+ SpA Primal Kyogre Hydro Pump vs. 248 HP / 252+ SpD Dialga in Rain: 135-160 (33.4 - 39.7%) -- 24.2% chance to 3HKO after Leftovers recovery
0 Atk Primal Kyogre Earthquake vs. 248 HP / 0 Def Dialga: 176-208 (43.6 - 51.6%) -- guaranteed 3HKO after Leftovers recovery
252 Atk Primal Kyogre Earthquake vs. 248 HP / 0 Def Dialga: 208-246 (51.6 - 61%) -- 94.5% chance to 2HKO after Leftovers recovery
252+ SpA Kyogre Water Spout (150 BP) vs. 248 HP / 252+ SpD Dialga in Rain: 186-219 (46.1 - 54.3%) -- 5.9% chance to 2HKO after Leftovers recovery
+1 252+ SpA Primal Kyogre Hydro Pump vs. 248 HP / 252+ SpD Dialga in Rain: 204-240 (50.6 - 59.5%) -- 84% chance to 2HKO after Leftovers recover
Kyogre needs major Attack investment to 2HKO Dialga with Earthquake. Origin Pulse + a simple Calm Mind will push that 3HKO into a 2HKO, Earthquake seems sort of useless besides hitting Dialga on the switch in. Kyogre can just setup Calm Mind in Dialga's face. Zekrom doesn't like STAB Origin Pulse at all while Ice Beam wrecks it as well.
Gyro Ball is an advantage for Steelix over Mega Aggron then, OHKOes +2 Xerneas. STAB EQ, sets up Stealth Rock, and no free switch in for Primal Groudon, Kyogre, Dialga, Blaziken and friends. Probably still sucks in Ubers since Aggron was a failure
252+ SpA Primal Kyogre Hydro Pump vs. 248 HP / 252+ SpD Dialga in Rain: 135-160 (33.4 - 39.7%) -- 24.2% chance to 3HKO after Leftovers recovery
0 Atk Primal Kyogre Earthquake vs. 248 HP / 0 Def Dialga: 176-208 (43.6 - 51.6%) -- guaranteed 3HKO after Leftovers recovery
252 Atk Primal Kyogre Earthquake vs. 248 HP / 0 Def Dialga: 208-246 (51.6 - 61%) -- 94.5% chance to 2HKO after Leftovers recovery
252+ SpA Kyogre Water Spout (150 BP) vs. 248 HP / 252+ SpD Dialga in Rain: 186-219 (46.1 - 54.3%) -- 5.9% chance to 2HKO after Leftovers recovery
+1 252+ SpA Primal Kyogre Hydro Pump vs. 248 HP / 252+ SpD Dialga in Rain: 204-240 (50.6 - 59.5%) -- 84% chance to 2HKO after Leftovers recover
Kyogre needs major Attack investment to 2HKO Dialga with Earthquake. Origin Pulse + a simple Calm Mind will push that 3HKO into a 2HKO, Earthquake seems sort of useless besides hitting Dialga on the switch in. Kyogre can just setup Calm Mind in Dialga's face. Zekrom doesn't like STAB Origin Pulse at all while Ice Beam wrecks it as well.
Gyro Ball is an advantage for Steelix over Mega Aggron then, OHKOes +2 Xerneas. STAB EQ, sets up Stealth Rock, and no free switch in for Primal Groudon, Kyogre, Dialga, Blaziken and friends. Probably still sucks in Ubers since Aggron was a failure