Aggron

You can tell its age by the length of its iron horns. It claims an entire mountain as its territory.

Second Strike (40): If the Defending Pokémon already has any damage counters on it, this attack does 40 damage plus 40 more damage.

Guard Claw (60): During your opponent's next turn, any damage done to Aggron by attacks is reduced by 20 (after applying Weakness and Resistance).