:P
Now, I've tried out multiple Pokemon in this team, and I really think that this group of Pokemon has worked the best. So... here's the team!
Gengar - Focus Sash
Ability: Levitate
EV Spread: 252 Special Attack/252 Speed/6 HP
Nature: Timid
Moves:
Shadow Ball
Hidden Power [Ice]
Thunderbolt
Focus Blast
This Gengar seriously can sweep teams without losing any health. It can also sweep teams with only 1 health left. :P Shadow Ball and Focus Blast hit everything in the game for super effective, Thunderbolt is for Gyarados, and Ice Beam is for Garchomps and Salamences. Focus Sash pretty much ensures I can at least kill ONE of the opposing Pokemon.
Infernape - Life Orb
Ability: Blaze
EV Spread: 252 Special Attack/232 Speed/24 Attack
Nature: Naive
Moves:
Flamethrower
Close Combat
ThunderPunch
Hidden Power [Ice]
Mixape can absolutely rape teams. This can sweep like no other, at least until Life Orb gets it down low enough that it dies. This gets amazing coverage.
Blissey - Leftovers
Ability: Serene Grace
EV Spread: 252 HP/252 Defense/6 Special Attack
Nature: Bold
Moves:
Seismic Toss
Softboiled
Thunder Wave
Stealth Rock
This Blissey can completely wall the HELL out of teams. It has survived a Registeel's Explosion and a Blaziken's Reversal. Stealth Rock makes sure that Yanmega, Moltres, and Ninjask will think twice before switching in. Softboiled is so I can wall even more, Thunder Wave is to cripple opponents, and Seismic Toss is to slowly wear down my opponents.
Suicune - Leftovers
Ability: Pressure
EV Spread: 252 HP/252 Defense/6 Special Defense
Nature: Bold
Moves:
Calm Mind
Rest
Surf
Sleep Talk
RestTalk Suicune can become a real pain for the opponent. Even when I get down low in health, I can just rest, and keep stat upping/attacking with Surf.
Garchomp - Yache Berry
Ability: Sand Veil
EV Spread: 252 Attack/252 Speed/6 Special Defense
Nature: Adamant
Moves:
Swords Dance
Outrage
Earthquake
Substitute
I cannot express how much Adamant Yache Chomp can RAPE teams. Outrage is my main attack, hitting everything except for Steel types for at least neutral. That's why I have Earthquake as my other STAB, and Fire Blast. Crunch can do a lot of damage to Cresselia.
Heatran - Choice Scarf
Ability: Flash Fire
EV Spread: 252 Special Attack/252 Speed/6 HP
Nature: Modest
Moves:
Fire Blast
Explosion
Hidden Power [Ice]
Earth Power
Heatran works amazingly well with Garchomp, resisting both of Garchomps weaknesses, and being able to revenge kill very well. Choice Scarf pretty much allows me to outspeed most things, and pretty much only a Weavile with Brick Break will worry me.
Well guys, there you have it. Please rate my team!
Now, I've tried out multiple Pokemon in this team, and I really think that this group of Pokemon has worked the best. So... here's the team!

Gengar - Focus Sash
Ability: Levitate
EV Spread: 252 Special Attack/252 Speed/6 HP
Nature: Timid
Moves:
Shadow Ball
Hidden Power [Ice]
Thunderbolt
Focus Blast
This Gengar seriously can sweep teams without losing any health. It can also sweep teams with only 1 health left. :P Shadow Ball and Focus Blast hit everything in the game for super effective, Thunderbolt is for Gyarados, and Ice Beam is for Garchomps and Salamences. Focus Sash pretty much ensures I can at least kill ONE of the opposing Pokemon.

Infernape - Life Orb
Ability: Blaze
EV Spread: 252 Special Attack/232 Speed/24 Attack
Nature: Naive
Moves:
Flamethrower
Close Combat
ThunderPunch
Hidden Power [Ice]
Mixape can absolutely rape teams. This can sweep like no other, at least until Life Orb gets it down low enough that it dies. This gets amazing coverage.

Blissey - Leftovers
Ability: Serene Grace
EV Spread: 252 HP/252 Defense/6 Special Attack
Nature: Bold
Moves:
Seismic Toss
Softboiled
Thunder Wave
Stealth Rock
This Blissey can completely wall the HELL out of teams. It has survived a Registeel's Explosion and a Blaziken's Reversal. Stealth Rock makes sure that Yanmega, Moltres, and Ninjask will think twice before switching in. Softboiled is so I can wall even more, Thunder Wave is to cripple opponents, and Seismic Toss is to slowly wear down my opponents.

Suicune - Leftovers
Ability: Pressure
EV Spread: 252 HP/252 Defense/6 Special Defense
Nature: Bold
Moves:
Calm Mind
Rest
Surf
Sleep Talk
RestTalk Suicune can become a real pain for the opponent. Even when I get down low in health, I can just rest, and keep stat upping/attacking with Surf.

Garchomp - Yache Berry
Ability: Sand Veil
EV Spread: 252 Attack/252 Speed/6 Special Defense
Nature: Adamant
Moves:
Swords Dance
Outrage
Earthquake
Substitute
I cannot express how much Adamant Yache Chomp can RAPE teams. Outrage is my main attack, hitting everything except for Steel types for at least neutral. That's why I have Earthquake as my other STAB, and Fire Blast. Crunch can do a lot of damage to Cresselia.

Heatran - Choice Scarf
Ability: Flash Fire
EV Spread: 252 Special Attack/252 Speed/6 HP
Nature: Modest
Moves:
Fire Blast
Explosion
Hidden Power [Ice]
Earth Power
Heatran works amazingly well with Garchomp, resisting both of Garchomps weaknesses, and being able to revenge kill very well. Choice Scarf pretty much allows me to outspeed most things, and pretty much only a Weavile with Brick Break will worry me.
Well guys, there you have it. Please rate my team!