I'm thinking I'll try making a team around bulk-up Dialga. I'll just cover its weaknesses, Use Latios or something to kill other groudon, garchomp, infernape, and other stuff that it might have problems with. Dialga makes a pretty good anti rain poke too. I'll probally use Kyogre, Ludicolo, Latios, Dialga.. that would rape
That might be a little difficult - you might get 1 or 2, but Dialga will be dead. Spread moves like EQ will be just as popular, and Mewtwo can always Aura Sphere it.