Ludicolo is a must for your team. I'd also suggest you mine yourself a Cradily and get a Tangela from Berryl Ward. Contrary to the other types, you will have serious problems with Shelly,Correy,Aya,Cal,Serra,Radomus,Charlotte
For Charlotte, begin with a Leavanny and Ludicolo. The one with X4 weakness to fire gets the hit and Ludi sets up rain dance. After that, enter Torterra and EQ.