Virizion

In a tier packed to the brim with Fighting-types, Virizion stands out from the crowd with its rare Grass / Fighting typing, shared only with the OU Breloom. Its Grass typing allows Virizion to get past the archenemy of Fighting-types, Slowbro, with either Leaf Blade or Giga Drain. It also boasts solid mixed offensive stats of 90 apiece, which is complemented by two excellent boosting moves in Swords Dance and Calm Mind, allowing Virizion to fulfill the role of a fast and powerful physical sweeper or a bulky yet speedy special sweeper. However, every Pokemon has their faults, and Virizion is no exception. It suffers from a massive weakness to Flying, meaning that Pokemon such as Tornadus and Crobat can come in on both of Virizion's STABs and proceed to eliminate it with Hurricane or Brave Bird. Its STABs don't have great coverage, so it must beware of that. Moreover, although Virizion sports a massive base 129 Special Defense, it also has mediocre base 72 Defense, so it can be hit hard by any physical attack. Don't let these faults deter you from using Virizion though; if you play it to its strengths, it will serve you well.