I would like to introduce the Pokemon that got me to number one on the ladder (albeit an almost dead ladder):
Set Name: Trick Room Cyclohm
Move 1: Trick Room
Move 2: Draco Meteor
Move 3: Thunderbolt
Move 4: Hydro Pump/ Flamethrower
Item: Life Orb
Ability: Shield Dust
Nature: Quiet
EVs: 252 HP / 252 SpAtk
This set abuses two of Cyclohm's stats - its low speed, and its amazing special attack. The plan is simple - get in on something like Pyroak, Jirachi, or Bulky Gyarados, and then start attacking, and usually killing, everything that isn't named Blissey. This set works best with slow, bulky team members like DD Pyroak and DD Nite, as they will outspeed a lot of quicker attackers during Trick Room, and they can DD up on the turn that Trick Room ends, making them the fastest pokemon.