My team is:
serperior lvl 37
duosion lvl 36(traded from black,obtained from friend)
conkeldurr lvl 36
golurk lvl 47(traded from black also)
oh yes this is for the fourth gym and I did something between my black and white,since I have two ds's and a complete black,i traded serperior as a servine to evolve to serperior thru exp.share and I traded conkeldurr as a timburr to evolve to gurdurr,then trade gurdurr over to white so it would evolve.i did it with an exp.share.worked well.gonna use it in the future.