Okay, not Heatran
Excadrill @ Life Orb
Ability: Sand Rush
EVs: 252 Atk / 64 SpD / 192 Spe
Nature: Adamant
- Earthquake
- Rock Slide
- Shadow Claw
- Swords Dance
In lieu of using Rapid Spin this Excadrill goes on the fully offensive route, achieving almost perfect coverage with both Shadow Claw, Swords Dance, and its obligatory STAB. This set won't take a +1 Outrage THAT well, but it still is very far off from an OHKO (47.37% - 55.68%), whilst an Earthquake from LO Excadrill will deal 67% minimum to a +1 Dialga, meaning that Excadrill can safely Swords Dance and then OHKO Dialga the next turn. Even if Dialga gets two Bulk Ups in a row Excadrill will still get a guaranteed OHKO on it at after a Swords Dance, with no entry hazards.
This set isn't that niche either, with sandstorm support it will run through many teams, if Kyogre attempts to switch in for a revenge kill it will take an enormous 73% minimum, and even max / max Bold Kyogre will take 46 - 54%, a guaranteed 2HKO with one layer of Spikes and Stealth Rock, and a high chance with only Stealth Rock.
Even Giratina-O, whose ability and towering 150/100/100 defensive stats is OHKO'd with no HP or Defence investment (quite common) at +2 by Shadow Claw, without Stealth Rock.
Giratina-A, the pinnacle of Physical walling, that has the potential to even avoid the OHKO from an Adamant CB Zekrom Outrage will take 60-71% from a +2 Earthquake, meaning that with a bit of residual damage or enough hazards, it too will fall.
Lugia, also renowned for its defensive abilities, will take a minimum of 73% from a +2 Rock Slide, so with Stealth Rock it has a very high chance of being OHKO'd, and will faint if Sandstorm is up even if minimum damage is rolled.