Aegislash

Apparently, it can detect innate qualities of leadership. According to legend, whoever it recognizes is destined to become king.

Painful Sword: Double the number of damage counters on each of your opponent's Pokémon.

Megaton Slash (100): This attack does 10 damage to 2 of your opponent's Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)