@Happiny: Drifblim can surprise attack by Galactic Switching an energy over and then attaching from hand. Much in the same way that ERL techs were/are used in LuxChomp.
I haven't tested much w/ it but I think it could be great. Swinging for the auto KO on Mewtwo and being able to, for only an additional energy, shuffle in a tank like Dialga, Gigas, Steelix, T-Tar, etc. is pretty solid, but like I said, it needs to be tested.