Skarmory @ Rocky Helmet
Bold Nature
Ability: Sturdy
EVs: 76 HP / 252 Def / 180 Spe
IVs: 0 Atk
- Spikes
- Body Press
- Iron Defense
- Roost
this is a pretty standard skarmory set, but the real difference here is the heavy speed investment, which lets it outspeed the heatran and double tap it with body press while it's switching in(and another one because you outspeed), or click iron defense and then OHKO on the next turn. Rocks are nice here for guaranteeing the KO. calcs for both going for double body press and iron defense into body press:
+2 252+ Def Skarmory Body Press vs. 252 HP / 0 Def Heatran: 384-454 (99.4 - 117.6%) -- 93.8% chance to OHKO
252+ Def Skarmory Body Press vs. 252 HP / 0 Def Heatran: 192-228 (49.7 - 59%) -- 75.8% chance to 2HKO after Leftovers recovery
252+ Def Skarmory Body Press vs. 252 HP / 0 Def Heatran: 192-228 (49.7 - 59%) -- guaranteed 2HKO after Stealth Rock and Leftovers recovery
+2 252+ Def Skarmory Body Press vs. 252 HP / 0 Def Heatran: 384-454 (99.4 - 117.6%) -- guaranteed OHKO after Stealth Rock(I know it gets a lefty turn, but it's still guaranteed OHKO). The only thing that is iffy is SD kart, but that is kinda iffy even with full defense investment
As for what you are sacrificing, it's actually not that much. You still wall non mixed chomp, every lando in existence, choiced kartana, every rilla ever... And this spread actually is also faster than fully invested neutral nature magnezone, letting you get a two-for-one lure deal (non iron defense ones just go down, against iron defense you might have to use your sturdy, but probably not since its still a high percent chance to KO it with body press before it gets you).
A great thing to notice is that if everything goes well, skarm will take a grand total of 0 damage from heatran, which means it can just continue playing basically as normal