Quoted By:
First and foremost, we recognize that Nidoking is not invincible. With common weakness to Water, Ground or Ice and a below average speed of 85, fast Pokemon such as Greninja, Pheromosa or Tapu Koko can outspeed it and easily revenge kill it without a problem.
However, with an arsenal of powerful attacks composed of Earth Power, Sludge Wave, Ice Beam, Thunder Bolt, Flamethrower, Shadow Ball, Focus Blast, Dragon Pulse, Hidden Power Everything, Earthquake, Poison Jab, Megahorn, Sucker Punch, Aqua Tail, Outrage, Rock Slide and Pay Day, combined to good offensive stats (102 Atk / 85 SpA) and the ability Sheer Force that gives it a recoil-free Life Orb boost, Nidoking is absolutely unpredictable.
Worse, it also learns moves such as Hone Claws or Rage, allowing it to fulfill a late game sweeper role, in addition of being a terrifying strike force against any form of stall. You can't also wear it down, as its unique type combination makes it immune to most form of paralysis and all types of poison.
Indeed, countering Nidoking is quite the tremendous challenge, as it can run enough movepool to hit any pokemon super effectively.
