Trick Room Team that I've been having some luck with on Showdown
Jelly Man (Reuniclus) @ Life Orb
Ability: Magic Guard
EVs: 192 HP/64 Def/252 Sp.Attack
Quiet Nature
-Trick Room
-Psychic
-Shadow Ball
-Focus Blast
The classic TR Special Sweeper set for Reuniclus, get in, set up the TR, and hit as many things as you can until the Trick Room needs resetting or you die. Psychic for the basic stab as well as Shadow Ball and Focus Blast for type coverage to get rid of those pesky Gengars and Tyranitars and whatnot.
Opuntia(Ferrothorn) @ Leftovers
Ability: Iron Barbs
EVs: 252 HP/48 Def/208 Sp.Def
Relaxed Nature
-Spikes
-Leech Seed
-Protect
-Gyro Ball
The slowest usable mon around, Ferrothorn takes great advantage of the TR, Gyro Balling everything in sight, and the Leech Seed/Leftovers combo replenishing a decent chunk of health each turn, with Protect to stall if you're in a pinch
Soul Patch (Conkeldurr) @ Assault Vest
Ability: Iron Fist
EVs: 140 HP/252 Attack/116 Sp.Def
Quiet Nature
-Drain Punch
-Hammer Arm
-Mach Punch
-Rock Slide
The last of the classic TR trio, Conkeldurr after a few Hammer Arms can outslow just about anything, and makes a good counter to the Mega Kangaskhan that will be running rampant at VGC. Even though he can't use some of his good coverage moves in the elemental punches, the new Assault Vest makes him crazy bulky, he has decent recovery in Drain Punch, and a priority move in Mach Punch in case the twisted dimensions return to normal
The Tortoise (Azumarill) @ Choice Band
Ability: Huge Power
EVs: 252 HP/252 Attack/4 Sp.Def
Brave Nature
-Waterfall
-Play Rough
-Return
-Aqua Jet
Another huge Physical Sweeper, great counter to mons such as Garchomp, Mega Charizard Y (or X for that matter), or Talonflame, with priority Aqua Jet in case things get sticky
Himamanava (Abomasnow) @ Abomasite
Ability: Snow Warning
EVs: 4 HP/252 Attack/252 Sp.Attack
Brave Nature
-Blizzard
-Wood Hammer
-Earthquake
-Ice Shard
Abomasnow, aka the slowest Mega Evolution in the game, makes great use of the TR set, providing a counter to even the bulkiest of Water types and making a great wall-breaker with its ridiculous base 132 Attack and Special Attack
Jessabelle (Aromatisse) @ Pixie Plate
Ability: Aroma Veil
EVs: 252 HP/240 Defense/16 Sp. Defense
Relaxed Nature
-Trick Room
-Wish
-Aromatherapy
-Moonblast
Second TR setter, in addition to being a decent physical wall and having access to wish and aromatherapy, giving it it's role as a cleric, and it's ability preventing it from getting taunted into uselessness, as is all too often the case with clerics, and a boosted Moonblast just for kicks

Jelly Man (Reuniclus) @ Life Orb
Ability: Magic Guard
EVs: 192 HP/64 Def/252 Sp.Attack
Quiet Nature
-Trick Room
-Psychic
-Shadow Ball
-Focus Blast
The classic TR Special Sweeper set for Reuniclus, get in, set up the TR, and hit as many things as you can until the Trick Room needs resetting or you die. Psychic for the basic stab as well as Shadow Ball and Focus Blast for type coverage to get rid of those pesky Gengars and Tyranitars and whatnot.

Opuntia(Ferrothorn) @ Leftovers
Ability: Iron Barbs
EVs: 252 HP/48 Def/208 Sp.Def
Relaxed Nature
-Spikes
-Leech Seed
-Protect
-Gyro Ball
The slowest usable mon around, Ferrothorn takes great advantage of the TR, Gyro Balling everything in sight, and the Leech Seed/Leftovers combo replenishing a decent chunk of health each turn, with Protect to stall if you're in a pinch

Soul Patch (Conkeldurr) @ Assault Vest
Ability: Iron Fist
EVs: 140 HP/252 Attack/116 Sp.Def
Quiet Nature
-Drain Punch
-Hammer Arm
-Mach Punch
-Rock Slide
The last of the classic TR trio, Conkeldurr after a few Hammer Arms can outslow just about anything, and makes a good counter to the Mega Kangaskhan that will be running rampant at VGC. Even though he can't use some of his good coverage moves in the elemental punches, the new Assault Vest makes him crazy bulky, he has decent recovery in Drain Punch, and a priority move in Mach Punch in case the twisted dimensions return to normal

The Tortoise (Azumarill) @ Choice Band
Ability: Huge Power
EVs: 252 HP/252 Attack/4 Sp.Def
Brave Nature
-Waterfall
-Play Rough
-Return
-Aqua Jet
Another huge Physical Sweeper, great counter to mons such as Garchomp, Mega Charizard Y (or X for that matter), or Talonflame, with priority Aqua Jet in case things get sticky

Himamanava (Abomasnow) @ Abomasite
Ability: Snow Warning
EVs: 4 HP/252 Attack/252 Sp.Attack
Brave Nature
-Blizzard
-Wood Hammer
-Earthquake
-Ice Shard
Abomasnow, aka the slowest Mega Evolution in the game, makes great use of the TR set, providing a counter to even the bulkiest of Water types and making a great wall-breaker with its ridiculous base 132 Attack and Special Attack

Jessabelle (Aromatisse) @ Pixie Plate
Ability: Aroma Veil
EVs: 252 HP/240 Defense/16 Sp. Defense
Relaxed Nature
-Trick Room
-Wish
-Aromatherapy
-Moonblast
Second TR setter, in addition to being a decent physical wall and having access to wish and aromatherapy, giving it it's role as a cleric, and it's ability preventing it from getting taunted into uselessness, as is all too often the case with clerics, and a boosted Moonblast just for kicks
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