Aggron @ Choice Band Trait: Rock Head EVs: 92 HP / 252 Atk / 164 Spd Adamant Nature (+Atk, -SAtk) - Head Smash - Earthquake - Aqua Tail - Superpower This thing can be really destructive with the right support. However, it really needs that support. I'm gonna start by saying that its Speed and common weaknesses suck. Several common Pokemon can revenge kill it, such as Politoed or Terrakion. However, if you can get this thing in and a turn to Head Smash, something is gonna die. I think the power is best shown by calcs: Head Smash vs 220 HP / 0 Def Celebi: 90% - 106%. Guaranteed KO after Stealth Rock. Head Smash vs 0 HP / 0 Def Mienshao: 100% - 117%. Guaranteed KO. Head Smash vs 252 HP / 0 Def Multiscale Dragonite: 96% - 113%. 79% chance to KO. Head Smash vs 252 HP / 0 Def Latias: 107% - 126%. Guaranteed KO. Head Smash vs 252 HP / 252 Def Bold Sableye: 101% - 120%. Guaranteed KO. Head Smash vs 252 HP / 240 Def Bold Tentacruel: 93% - 110%. Guaranteed KO after Stealth Rock, 61% chance to KO without it. Head Smash vs 192 HP / 64 Def Reuniclus: 102% - 120%. Guaranteed KO. Those are all Pokemon that are either bulky or resist Head Smash, and are all OHKOed. Basically, unless your opponent has one of Hitmontop, Hippowdon, Swampert, or Bronzong something's gonna take a load of damage, as those are the only four Pokemon that aren't 2HKOed by Aggron. Head Smash vs 252 HP / 0 Def Gastrodon: 57% - 67%. Guaranteed 2HKO. Head Smash vs 252 HP / 252 Def Bold Slowbro: 61% - 72%. Guaranteed 2HKO. Head Smash vs 236 HP / 0 Def Breloom: 67% - 79%. Guaranteed 2HKO. Head Smash vs 252 HP / 44 Def Impish Gliscor: 73% - 86%. Guaranteed 2HKO. Head Smash vs 248 HP / 216 Def Bold Jellicent: 82% - 97%. Guaranteed 2HKO, 68% chance to KO after Stealth Rock. However, thanks to its base 180 Defense, which is godly, it can come in on several physical attackers without Close Combat and Earthquake. That Steel-typing is great with it, as +1 Outrage from offensive Adamant Dragonite does 32% - 38%, meaning you can tank it easily and KO it with Head Smash. Several other Head Smash opportunities are Skarmory, Scizor locked in anything but Superpower, Ferrothorn, Terrakion locked in Stone Edge, just to name a few. With sandstorm support, this thing also gets respectable special bulk, and can come in several special attackers when combined with its typing, such as Latias, Celebi, bulky Volcarona, or Latios locked in Draco Meteor. Earthquake provides coverage for this set, hitting Pokemon such as Toxicroak and Nidoqueen. Aqua Tail and Superpower are in the last two slots, hitting bulky Ground-types and Ferrothorn respectively, but mostly you'll be using Head Smash anyways. if you want, you can replace either one with Ice Punch or Toxic. 164 Speed EVs let Aggron outspeed Skarmory and Head Smash it, which can even KO after Stealth Rock if Skarmory is specially defensive! A few more Speed EVs can be invested for Skarmory with Speed invested and such.