Lesse here
First and foremost, you should put up descriptions for your Pokemon.
That aside, as for the actual team, I suggest you remove Attract from Skarmory and Forretress; it's an unreliable and not particularly useful move. Forretress is probably a better candidate for setting up Stealth Rock, while Skarm is better for Spikes. If you want an attack move on Skarm, Brave Bird is superior to Sky Drop, also, Whirlwind is a great option for Skarm. You could add Earthquake, Gyro Ball, or Explosion to Forretress, depending on preference. Nidoking would be better off with Earth Power over Earthquake, and Life Orb, Specs, or Scarf is a better item. Mienshao's moveset seems pretty iffy, as with no Fighting move his damage potential is really hampered. Would probably be best to get rid of one of its Normal moves for Hi Jump Kick, or even another fighting type move if you're afraid of its low accuracy. Finally, Air Cutter is a mediocre move for Butterfree, something like Hidden Power Fire would be better.