I suppose heysup is partially referring to my team aswell, as i use 3 trickroom setup mons and 3 sweepers. It has netted me quite a lot of wins, and trickroom in doubles also feels quite damn broken (got me to #1 on the PO ladder, but thats not much of an achievement). What i was using is:
Snover @ Oran Berry
Blizzard / Energy Ball / Hidden Power / Protect
&
Porygon @ Oran Berry
Trick Room / Recover / Blizzard / Thunderbolt
Cubone @ Thick Club
Substitute / EQ / Fire Punch / Double Edge
&
Bronzor @ Oran Berry
Trick Room / Psychic / HP Ice / Confuse Ray
Slowpoke @ Oran Berry
Trick Room / Aqua Tail / Zen Headbut / filler
&
Shellder @ Oran Berry
Icicle Spear / Rock Blast / Ice Shard / Protect
Simply put, start off with trickroom and doubleblizzards to punch gaping holes in opposing teams and if that didnt suffice yet, either cubone (preferably with bronzong on screen) kicks with eq spam. Shellder and slowpoke are somewhat of a backup, but have proven usefull some times.