
Ninjask @ Leftovers
Trait: Speed Boost
EVs: 248HP, 8SpDef, 252Spd
Nature: Calm
~ Substitute
~ Protect
~ Swords Dance
~ Baton Pass
Ninjask does the only thing it can do. Stalling with Substitute and Protect while gaining Speed Boosts. If it manages to keep a Substitute up for more than a turn, I can start Swords Dancing behind it. When I have enough boosts, I can Pass into Espeon for a Stored Power sweep.

Starmie @ Leftovers
Trait: Natural Cure
EVs: 252SpAtk, 4SpDef, 252Spd
Nature: Timid
~ Rapid Spin
~ Thunderbolt
~ Ice Beam
~ Surf
A standard set for Starmie. Rapid Spin protects me from ever present entry hazards, especially if I want to get Ninjask back out.

Dragonite @ Lum Berry
Trait: Multiscale
EVs: 252Atk, 4SpDef, 252Spd
Nature: Adamant
~ Outrage
~ Fire Punch
~ Superpower
~ Roost
This is a basic Dragonite set for me. Lum Berry gives him versatility by protecting him from status or Outrage's confusion. Fire Punch and Superpower let me oust pesky Steel and Ice types, and Roost is, well, Roost.

Gengar @ Life Orb
Trait: Levitate
EVs: 4HP, 252SpAtk, 252Spd
Nature: Timid
~ Taunt
~ Shadow Ball
~ Giga Drain
~ HP Fire
A taunting Gengar can stop setups and Roars and other status moves, while his other 3 moves give him a decent coverage over most Pokemon.

Breloom @ Lum Berry
Trait: Technician
EVs: 4HP, 252Atk, 252Spd
Nature: Jolly
~ Bullet Seed
~ Mach Punch
~ Substitute
~ Spore
I personally prefer Techniloom over Poison Heal, mostly due to the fact that it gives me more power for Bullet Seed and Mach Punch. I usually pass into him from Espeon, often passing along Speed and Attack boosts.

Espeon @ Leftovers
Trait: Magic Bounce
EVs: 4HP, 252SpAtk, 252Spd
Nature: Modest
~ Baton Pass
~ Psyshock
~ Stored Power
~ HP Fighting
With all the boosts from Ninjask, Stored Power can reach insane levels. HP Fighting lets me cover Dark type switch-ins, and Psyshock is for when I fail to set up with Ninjask. Baton Pass gives me an escape option, while still keeping the powerups. Her ability Magic Bounce protects me from Roar and status moves.
Overall, this team wins about half of the time, but outside of simulators, it almost always wins.