There's an old saying... "You must win with your favorites."
Role: OU Sweeper.
Aggron (M) @ Life Orb
Ability: Rock Head
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Head Smash
- Hone Claws
- Magnet Rise
- Autotomize
You can't missplay with this thing. Aggron, despite having immense power, suffers from his weaknesses. You'll have to play smart. Head Smash is STAB with 150 base power, 80% accuracy and no recoil, thanks to Rock Head. With Adamant nature, its attack reaches 350, and with Life Orb, it becomes deadly. However, despite such firepower, Aggron can still suffer OHKO if you just throw him on the field. You must play smart; he is no different than any other Sweeper. If you see any opportunity to set up, go. Try to force something out. There are also certain Pokemons that can't do much damage to Aggron, so you can set in front of them. You can also set against slow enemies, like Hippowdow. Let me explain: with 252 EV's at speed, Aggron's speed reaches 199. this makes it faster than Hippowdow, and some other slow Pokemon. Thanks to Magnet Rise, you can become immune to ground moves for a few turns. The opponent will either be forced to switch, or resort to moves that do not cause as much damage. In any case, you should have at least one chance to set; and you don't need anything else. Use Automatize and Aggron's speed will go to 398, surpassing Greninja, Gengar, Infernape, Tapu Koko, Crobat, Garchomp, and many others. With the power of Head Smash and now amazing speed, Aggron may well do serious damage to the enemy team. But, if you want to turn this iron dinosaur into a killing machine, use Hone Claws. His attack goes to 525, and the accuracy of Head Smash goes to 106%. This means that, under normal conditions, you can't miss. Just imagine a STAB with 150 base power, with a 525 attack status, and a Life Orb. This thing is capable of OHKO almost anything that has no resistance; hits Mega-Scizor, Corviknight and Skarmory in neutral, causing their deaths. And even against the ground types, you have the advantage, since they cannot use their STAB on you thanks to Magnet Rise, and you can use the extremely powerful Head Smash to remove at least 50% of the HP. And don't worry; you don't need coverage if you have the power. Of course, you're still doomed to suffer from certain evils, like Prankster Burn, Focus Sash, Taunt, being outspeed by Zera-Ora, Dragapult, Mega-Beedril, Mega Loppuny and Zacian, being potentially walled by Ferrothorn, and other things. but so far, which Pokemon is perfect in every way? Aggron is a very good driving force, and can cause severe damage to the enemy team if used wisely and with the support of your team.
GET YOURSELF A M-F** AGGRON.
PS: Don't even think on using it on doubles.