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Imprison is kind of devious. I like it.
Anyway, I get the impression that most people playing PiC are primarily singles players and might not be used to working with trick room. I'm sure someone else could do a better job with this, but to whomever it may help:
Cresselia
Diancie
Hoopa...
One other possible bug. If a pokemon with illusion mega evolves (hackmons only) and then receives direct damage, the illusion does not fade, and imposter is still blocked. Is this how it would work in ORAS?
Replay: http://replay.pokemonshowdown.com/bhdoubles-437905039
Thousand Waves hasn't been behaving like it's supposed to (I think). I don't have the screenshot of the exact moment, but I get the thousand waves trap warning (preventing me from switching) sometimes even after the user of thousand waves has switched out or fainted.
Two examples...
The replay that Matt posted brings up a possible precedent for the unaware discussion. It's my understanding that burn used to cut attack (in earlier generations-- http://bulbapedia.bulbagarden.net/wiki/Burn_(status_condition) ) but switched to cutting all physical attacks; foul play is now only...