“Can Bush pardon himself? Can he pardon his administration, then resign and have Chenny pardon him?”
He can only pardon convictions. He cant grant himself or anyone else immunity from future prosecution.
So the answer is no, all around.
He can pardon Scooter, though.
Ford pardoned Nixon “for any crimes he may have committed” and this caused his downfall. Lots of dems wanted to prosecute Nixon. Bush won’t have the balls to do the same.