I like to train on Team Hydro, Marshtomp and Charmeleon take care of them easily, even though they have a disadvantage. But, Blastoise is annoying, using Protect and Withdraw and crap, but it just makes me waste my time. But the EXP is what makes it all worth it. I leveled up my Marshtomp to a Swampert doing that lol.
Team Omni: Platinum Rank
Swampert (Leader)
Charizard
We'll catch you if you fall, we'll keep you safe, no matter what happens.