ZoroarkForever I agree with your points about Flygon, for the most part (I won't discuss where it should be, exactly. That's not the point of this post), except for the "very strong Arceus-Rock check" part. That's debatable, beause if you run Earthquake, you can easily get burned by Groudon-Primal's Lava Plume one of the myriad of times you will switch into it and if you run Earth Power (which makes it so you don't care about burns), you can't check Calm Mind / Refresh Arceus-Rock. So, yes, you can absolutely switch into Arceus-Rock, but if it's Calm Mind / Refresh (and quite a few of them are), you can run into the problems I mentioned above. About it being a double dance Groudon-Primal and Arceus-Ground check; I absolutely agree.
Just a couple quick calcs:
+2 252+ Atk Primal Groudon Stone Edge vs. 248 HP / 252+ Def Flygon: 127-150 (34.9 - 41.3%) -- guaranteed 3HKO
+2 252 Atk Arceus-Ground Stone Edge vs. 248 HP / 252+ Def Flygon: 85-101 (23.4 - 27.8%) -- 78.7% chance to 4HKO
Just a couple quick calcs:
+2 252+ Atk Primal Groudon Stone Edge vs. 248 HP / 252+ Def Flygon: 127-150 (34.9 - 41.3%) -- guaranteed 3HKO
+2 252 Atk Arceus-Ground Stone Edge vs. 248 HP / 252+ Def Flygon: 85-101 (23.4 - 27.8%) -- 78.7% chance to 4HKO
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