Tried showdown the other day, setup with perma flinch and stealth rock blissey.
onix with weakarmor setup to bait and force switches with dragon tail and roar. If he got fast enough, he could keep damage switching and no one would be able to attack.
poison touch croagunk, setup with a 2 hit move, and superfang. cutting half their hp and poisoning them at the same time was such a trip.
death seeker gengar. :) cursebody for disable , also the move disable to try to force them into struggle. Focus sash destiny bond and for the extra troll, the last move was explosion.