Porygon2 is also a solid counter to them...Actually, I just finished a battle where it was tanking hits even with its Eviolite Knocked Off...
Oh, and no offense, but I found a video with dance moves Trapinch can only dream of...it's a bit slow at the beginning, but near the end, it's AMAZING. Here it is.
Your OU team looks pretty solid, but i dunno that much about OU to give you a good rate. Hopefully one of the TR's will take a look at it. The only thing I can say is that you look a little rain-weak, since Virizion and Hydreigon are about your only safeguards against it. Good luck! :D
yeah no matter what your team is your going to have problems with Yanmega. About the best counters you can hope for are Munchlax, Probopass (watch out for HP Ground) and Entei.
I really really hate Tangela though and I'd suggest anything over it. Clefable doesn't seem like a good match for your team either.
I'd put Cresselia (I <3 SubCM) over Clefable, you lose Wish support, but gain the best Pokemon of the tier atm. I run Sub/CM/Moonlight/IceBeam.
You're lacking a Spinner for your team, for both Galvantula and Moltres. Also I assume Clefable was your Stealth Rocker, so I'd recommend Sandslash. A more defensive Donphanish set I think would be best. Stealth Rock/Rapid Spin/Earthquake/whatever your heart desires.
