Description: Strong in Def / Atk, but has horrible Speed. The first is, you can Toxic, Roar and poison every Pokemon on their team, and because of his bulky Def, hopefully not lose much Hp. Another way it can be an advantage is if you Roar in something like a Mantric, which your Earthquake will wreck. However, it could just as easily bring in a Gyrados, or Blazikin. Gyrados's Waterfall could OHKO you, and Blazikin's Flamethrower could too. If you somehow survive one turn, you can lay into a Gyrados with Dragon Claw, and Blazikin with Earthquake. A nice Pokemon for a Lead. Bulky Def, nice moveset, lots of choices. This might also can be pretty decent to use for a Trick Room team.
Options: Double Edge gives you great damage, and with your Rock Head ability, no recoil damage. Dragon Claw is great because it's a Dragon move, and it hits everything decent. Earthquake is just a good move in general. Good Atk, and Accuracy. Toxic is a "last resort." You can use it when you are about to die to punish the foe that killed you, or use it in combo with Roar. If you choose Roar over Double Edge, you lose an attack, but gain many advantages.
This is a good moveset for aggron (Pokemon #306) with the rock-head ability/trait, a Adamant nature, and equipped with Leftovers submitted by HyperBeam. For use in competitive Pokemon battles featuring an Export option and breeding guide.