My english is not very good, so please don't hate me for that.

Haxorus @ Choice Band
Mold Breaker
Adamant: 4 HP / 252 Atk / 252 Spe
Outrage / EarthQuake / Brick Break / Dual Chop
My Favorite lead in the 5th generation. It can destroy everything that doesn't resist. EQ and BrickBreak are for extra coverage. Dual Chop is my extra Dragon-move, I only use it if I don't want to lock myself into Outrage. It can kill Every weather-lead. The EV's are very straight-forward. With a Choice Band Haxorus' attack will raise to 648, wich is huge.

Mamoswine @ Choice Scarf
Snow Cloak
Adamant: 64 HP / 252 Atk / 192 Spe
Icicle spear / Super Power / EarthQuake / Stone Edge
Mamoswine is very important for my team, Icicle spear is for everything that hides behind a Sub. It can Kill Whimsicott and Breloom when they're behind a sub, and can also kill Multiscale Dragonite. EQ is a nice second STAB. SuperPower is for coverage, en Stone edge is for Volcarona. With the 192 Spe EV's I can outspeed Whimsicott, then max out Attack, the rest in HP.

Shaymin @ Leftovers
Natural Cure
Timid: 4 HP / 252 SpA / 252 Spe
Seed Flare / Earth Power / Hidden Power: Fire / Rest
One of my all-time favorites, Shaymin. This is my status absorber. It can also OHKO Scizor, and survive a Bullet Punch even after a Swords Dance. After I used Rest I'll switch, and because of Natural Cure it heals itself. Max out SpA and Spe, thats obvious. I've chosen Leftovers over Life Orb, with Life Orb it fainted to quick.

Thundurus @ Leftovers
Prankster
Timid: 4 HP / 252 SpA / 252 Spe
Nasty Plot / ThunderBolt / Hidden Power: Ice / Thunder Wave
Thundurus is awesome. Nasty Plot on the switch, and star sweeping. Thunder Wave is to criple fast enemies, so my teammates won't have that much trouble dealing with them. Once Thundurus has a Nasty Plot it is almost unstopable without Priority. Hidden Power Ice can OHKO Gliscor, and after a NP it can also OHKO other Thundurus'. So I always need an NP before the mirror-match occurs.

Conkeldurr @ Leftovers
Guts
Adamant: 120 HP / 252 Atk / 136 SpD
Bulk up / Drain Punch / Mach Punch / Payback
Pretty simple, Bulk up on things like Ferrothorn, then rip the other team apart. Drain Punch for the recovery, Mach punch for the weaker enemies and Excadrill. Payback against ghosts. Conkeldurr is the best counter for Chansey/Blissey and Ferrothorn. I use all three as a set-up fodder, and then I'll continue my sweep.

Politoed @ Choice Specs
Drizzle
Timid: 252 SpA / 4 SpD / 252 Spe
Hydro Pump / Ice Beam / Focus Blast / Hidden Power: Grass
Drizzletoed, my anti-sandstorm. Hydrop Pump is boosted by STAB + Rain + Specs, anything that doesn't resist wil get major damage. Focus Blast hits Tyranitar' and Ferrothorn'. Ice Beam is for Dragon and flying types. Hidden Power Grass is for the Water/ground types wich otherwise wall me very hard.