Let's just jump into it.
Gyarados@ Leftovers
Ability: Intimidate
Nature: Adamant (+Attack - SpA)
Spread: 212 Hp/176 Defense/104 Speed/16 Attack
Set:
-Waterfall
-Taunt
-Stone Edge
-Dragon Dance
Eh, a popular lead, counters alot of leads, is a good lead, that's why I choose it. Provides fighting resistance for Heatran and of course counters Heracross for my Cresselia. Any electric pokes that are leaded against him can be roared/eq'd by Swampert. Example: Jolteon, who likes to substute.
Heatran@ Leftovers
Ability: Flash Fire
Nature: Modest (+SpA -Attack)
Spread: 244Hp/96 Defense/108 SpA/60 SpD
Set:
-Lava Plume
-Earth Power
-Rest
-Sleep Talk
My phase absorber and Celebi counter. That pixie seems to become more and more popular on shoddy, so this is a must for this team. It also provides a wide range of weakness support for this team.
Cresselia@ Leftovers
Ability: Levitate
Nature: Bold (+Defense - Attack)
Spread: 80HP/252 Defense/176 SpD
Set:
-Calm Mind
-Ice Beam
-T-Wave
-Rest
Cresselia, the wall of all walls. A Garchomp counter and possibly a late game sweeper. I gave it special defense ev's because of this teams weakness to special attacks, and once set up, is a great special wall. T-wave is there because of this teams major lack of speed.
Heracross@ Choice Scarf
Ability: Swarm
Nature: Adamant (+Attack -SpA)
Spread:4Hp/252 Attack/252 Speed
Set:
-Megahorn
-Close Combat
-Stone Edge
-Pursuit
My revenge killer/starmie counter. Many have tried to switch out from this beast figuring out earlier in the game that it was scarfed and outspeeds most of there team, only to get destroyed by pursuit.
Garchomp@ Leftovers
Ability: Sand Veil
Nature: Jolly (+Speed -SpA)
Spread: 188Hp/252 Speed/68 Attack
Set:
-Substitute
-Earthquake
-Dragon Claw
-Sword Dance
My physical sweeper that is easily set up because of its bulky spread. Weezing and Dusknoirs fail to break this things (unless they pack a ice move) sub with shadow sneak/ will-o-wisp only forced to switch out and alow this to sword dance up. Seismic toss on Blissey doesn't break the sub, and if the persons blissey doesn't pack an Ice move and is desprate, they will most likely try to sacrifice there blissey to break the sub. The sub, im sure, can take other hits from other weak attacks.
Swampert@ Leftovers
Ability: Torrent
Nature: Relaxed (+Defense -Speed)
Spread: 240Hp/212 Defense/56 SpA
Set:
-Ice Beam
-Earthquake
-Roar
-Stealth Rocks
My stealth rocker and roarer, goes great with Gyarados. It counters some huge threats like metagross and Mamoswine. The spread is standard and the moveset, so there really isn't anything to explain.
Threat List:
Tyranitar: Gyarados (If not boah), Swampert, Heracross,Garchomp
Gyarados: My Gyarados, Garchomp (sometimes), Heracross (without intimidate)
Infernape: Gyarados, Heracross
Azelf: Heracross, Cresselia walls and calm minds up.
Electivire: Garchomp can take an Ice punch from him and eq if im desprate, but cresselia walls and so does swampert.
Heracross: Gyarados and maybe my Heracross.
Salamence: Gyarados,Cresselia,Swampert. Whatever form, specs or physical.
Togekiss: Gyarados,Heracross,Cresselia,Garchomp,Heatran
Gengar: Heatran sometimes, Heracross is my best bet
Garchomp: Swampert, Cresselia.
Lucario: Heracross, Garchomp, or Swampert
Starmie: Heracross, Cresselia Can wall and Cm up
Weavile: Gyarados, Swampert
Dugtrio: Gyarados, Swampert, Cresselia
Porygon-Z: Heracross, Heatran.
Machamp: Cresselia can wall, Gyarados and Garchomp might be able to destroy if set up.
Snorlax: Heracross, Gyarados can taunt, and Swampert can roar it if it sets up.
Zapdos: Cresselia, Swampert
Suicune: Swampert maybe can roar it away, no real counters for this beast...
Breloom: Heatran can absorb spore and this get's walled by Cresselia/Gyarados (after intimidate)
Ninjask: Swampert can roar this, and Gyarados owns it in the lead.
Metagross: Gyarados if it's not packing t-punch, but swampert is always a safe bet.
Heatran: Gyarados/Swampert
Celebi: Heatran
Jirachi: Heatran/Swampert
Dragonite: Cresselia/Garchomp/Swampert/Gyarados
Mamoswine: Gyarados, Cresselia, Swampert
Gallade: Gyarados,Cresselia
Yanmega: Heatran
Kingdra: Garchomp (if not raining), Prediction.
Roserade: Heatran
Scizor: Heatran

Gyarados@ Leftovers
Ability: Intimidate
Nature: Adamant (+Attack - SpA)
Spread: 212 Hp/176 Defense/104 Speed/16 Attack
Set:
-Waterfall
-Taunt
-Stone Edge
-Dragon Dance
Eh, a popular lead, counters alot of leads, is a good lead, that's why I choose it. Provides fighting resistance for Heatran and of course counters Heracross for my Cresselia. Any electric pokes that are leaded against him can be roared/eq'd by Swampert. Example: Jolteon, who likes to substute.

Heatran@ Leftovers
Ability: Flash Fire
Nature: Modest (+SpA -Attack)
Spread: 244Hp/96 Defense/108 SpA/60 SpD
Set:
-Lava Plume
-Earth Power
-Rest
-Sleep Talk
My phase absorber and Celebi counter. That pixie seems to become more and more popular on shoddy, so this is a must for this team. It also provides a wide range of weakness support for this team.

Cresselia@ Leftovers
Ability: Levitate
Nature: Bold (+Defense - Attack)
Spread: 80HP/252 Defense/176 SpD
Set:
-Calm Mind
-Ice Beam
-T-Wave
-Rest
Cresselia, the wall of all walls. A Garchomp counter and possibly a late game sweeper. I gave it special defense ev's because of this teams weakness to special attacks, and once set up, is a great special wall. T-wave is there because of this teams major lack of speed.

Heracross@ Choice Scarf
Ability: Swarm
Nature: Adamant (+Attack -SpA)
Spread:4Hp/252 Attack/252 Speed
Set:
-Megahorn
-Close Combat
-Stone Edge
-Pursuit
My revenge killer/starmie counter. Many have tried to switch out from this beast figuring out earlier in the game that it was scarfed and outspeeds most of there team, only to get destroyed by pursuit.

Garchomp@ Leftovers
Ability: Sand Veil
Nature: Jolly (+Speed -SpA)
Spread: 188Hp/252 Speed/68 Attack
Set:
-Substitute
-Earthquake
-Dragon Claw
-Sword Dance
My physical sweeper that is easily set up because of its bulky spread. Weezing and Dusknoirs fail to break this things (unless they pack a ice move) sub with shadow sneak/ will-o-wisp only forced to switch out and alow this to sword dance up. Seismic toss on Blissey doesn't break the sub, and if the persons blissey doesn't pack an Ice move and is desprate, they will most likely try to sacrifice there blissey to break the sub. The sub, im sure, can take other hits from other weak attacks.

Swampert@ Leftovers
Ability: Torrent
Nature: Relaxed (+Defense -Speed)
Spread: 240Hp/212 Defense/56 SpA
Set:
-Ice Beam
-Earthquake
-Roar
-Stealth Rocks
My stealth rocker and roarer, goes great with Gyarados. It counters some huge threats like metagross and Mamoswine. The spread is standard and the moveset, so there really isn't anything to explain.
Threat List:
Tyranitar: Gyarados (If not boah), Swampert, Heracross,Garchomp
Gyarados: My Gyarados, Garchomp (sometimes), Heracross (without intimidate)
Infernape: Gyarados, Heracross
Azelf: Heracross, Cresselia walls and calm minds up.
Electivire: Garchomp can take an Ice punch from him and eq if im desprate, but cresselia walls and so does swampert.
Heracross: Gyarados and maybe my Heracross.
Salamence: Gyarados,Cresselia,Swampert. Whatever form, specs or physical.
Togekiss: Gyarados,Heracross,Cresselia,Garchomp,Heatran
Gengar: Heatran sometimes, Heracross is my best bet
Garchomp: Swampert, Cresselia.
Lucario: Heracross, Garchomp, or Swampert
Starmie: Heracross, Cresselia Can wall and Cm up
Weavile: Gyarados, Swampert
Dugtrio: Gyarados, Swampert, Cresselia
Porygon-Z: Heracross, Heatran.
Machamp: Cresselia can wall, Gyarados and Garchomp might be able to destroy if set up.
Snorlax: Heracross, Gyarados can taunt, and Swampert can roar it if it sets up.
Zapdos: Cresselia, Swampert
Suicune: Swampert maybe can roar it away, no real counters for this beast...
Breloom: Heatran can absorb spore and this get's walled by Cresselia/Gyarados (after intimidate)
Ninjask: Swampert can roar this, and Gyarados owns it in the lead.
Metagross: Gyarados if it's not packing t-punch, but swampert is always a safe bet.
Heatran: Gyarados/Swampert
Celebi: Heatran
Jirachi: Heatran/Swampert
Dragonite: Cresselia/Garchomp/Swampert/Gyarados
Mamoswine: Gyarados, Cresselia, Swampert
Gallade: Gyarados,Cresselia
Yanmega: Heatran
Kingdra: Garchomp (if not raining), Prediction.
Roserade: Heatran
Scizor: Heatran