Here is a team I started working and testing in Smogon. It has evolved into this current team but I still lack some polish.
My current lead
Celebi @ Choice Scarf
Hasty
252hp/128s.def/128spe
Stealth Rock
Trick
U-Turn
Leaf Storm
Celebi comes in and cripples almost every lead with Trick-Scarf, in this fashion Celebi works like Azelf by Tricking then Stealth Rocking on the switch out. This also works by tricking Focus Sash leads into coughing up their Focus Sash.
Natural Cure in addition to Trick/Stealth Rock makes Celebi the best Sleep counter in my opinion (Smeargle/Breloom/Roserade) by being able to repeatedly absorb sleeps. Many never expect to see Celebi or expect it to walk into Spores, Will-O-Wisps or Thunder Waves then U-Turning out afterwards. In this manner Celebi is great vs. Blissey sporting Flamethrower + Status as she can easily block badjoo-joo from hitting Salamence
Suicune @ Leftovers
Bold
4s.atk/252hp/252def
Rest
Sleep Talk
Surf
Calm Mind
I don't have to explain Suicune, he's amazing and with his defense, there is barely anything he can't set up on, or PP starve. He RestTalks and absorbs Thunderwaves/Sleep like a champ. While taken for granted, the real effectiveness of Suicune is not seen untill he comes into play, as his amazing defenses allow him to survive even SE grass attacks. While Suicune is walled by Vaporeon, that weakness is handled by his partner Rotom-H. Otherwise it is very possible to sweep with Suicune in the late game once his counters are removed.
Rotom-H @ Leftovers
Calm
252hp/90s.atk/168s.def
Overheat
Will-O-Wisp
Pain Split
Discharge
The new HGSS Painsplit for Rotom is amazing on a defensive Rotom, combined with Crocune these are two mixed walls that can also cause heavy damage to my opponent's team. Thunderbolt deals with Zapdos and Bulky Waters while Overheat deals with Scizor who gets dealt with rather easily once hit by Will-O-Wisp
Edit: Thunderbolt was replaced with Discharge to aid in spreading status out on things unaffected by the Atk Penalty of Burn.
Lucario @ Life Orb
Adamant
252atk/4def/252spe
Swords Dance
Extreme Speed
Close Combat
Crunch
Lucario is great early game when you have to Revenge kill, or to bring it in on something to Swords Dance during a switch out. Once switched in safely, he hits anything not Ghost/Steel very hard with +2 Sword Dances. Though Lucario is often too slow to handle things such as Gengar, I question the need to have Crunch as it's rarely used compared to Close Combat or Extreme Speed.
Salamence @ Life Orb
Naive
16atk/240s.atk/252spd
Dragon Dance
Outrage
Earthquake
Fire Blast
Salamence is a DD MixMence here he hits like a DD Mence on the physical side, then when he gets walled, he hits just as hard with Draco Meteors when my opponent tries to grab his counter. This makes my DD MixMence hard to counter as he easily only needs one turn to set up to sweep a team and usually falls to Bullet Punches once Life Orb/SR has dealt him enough damage.
Scizor @ Iron Plate
Adamant
248hp/252atk/8spe
Bullet Punch
Pursuit
U-Turn
Superpower
Scizor is my epitome of a revenge killer, he holds a Iron Plate to hit like a CB - Scizor and then U-Turn away or counter switch outs with a Pursuit. Of all my pokemon, Scizor shares many weaknesses with Lucario and so together they are somewhat hindered and vulnerable to Heatran counters. Suicune exists as my teams biggest check to Heatran.
Many teams possess a Steel type to resist a Dragon sweep. Thus my own Steel types exist to pull the roadblocks out of Salamence's way.
The team is not perfect and I always want to try and improve it. Perhaps Thunder Wave support with Rotom to allow Lucario a better field for sweeping teams.
Please give me suggestions!
My current lead

Celebi @ Choice Scarf
Hasty
252hp/128s.def/128spe
Stealth Rock
Trick
U-Turn
Leaf Storm
Celebi comes in and cripples almost every lead with Trick-Scarf, in this fashion Celebi works like Azelf by Tricking then Stealth Rocking on the switch out. This also works by tricking Focus Sash leads into coughing up their Focus Sash.
Natural Cure in addition to Trick/Stealth Rock makes Celebi the best Sleep counter in my opinion (Smeargle/Breloom/Roserade) by being able to repeatedly absorb sleeps. Many never expect to see Celebi or expect it to walk into Spores, Will-O-Wisps or Thunder Waves then U-Turning out afterwards. In this manner Celebi is great vs. Blissey sporting Flamethrower + Status as she can easily block badjoo-joo from hitting Salamence

Suicune @ Leftovers
Bold
4s.atk/252hp/252def
Rest
Sleep Talk
Surf
Calm Mind
I don't have to explain Suicune, he's amazing and with his defense, there is barely anything he can't set up on, or PP starve. He RestTalks and absorbs Thunderwaves/Sleep like a champ. While taken for granted, the real effectiveness of Suicune is not seen untill he comes into play, as his amazing defenses allow him to survive even SE grass attacks. While Suicune is walled by Vaporeon, that weakness is handled by his partner Rotom-H. Otherwise it is very possible to sweep with Suicune in the late game once his counters are removed.

Rotom-H @ Leftovers
Calm
252hp/90s.atk/168s.def
Overheat
Will-O-Wisp
Pain Split
Discharge
The new HGSS Painsplit for Rotom is amazing on a defensive Rotom, combined with Crocune these are two mixed walls that can also cause heavy damage to my opponent's team. Thunderbolt deals with Zapdos and Bulky Waters while Overheat deals with Scizor who gets dealt with rather easily once hit by Will-O-Wisp
Edit: Thunderbolt was replaced with Discharge to aid in spreading status out on things unaffected by the Atk Penalty of Burn.

Lucario @ Life Orb
Adamant
252atk/4def/252spe
Swords Dance
Extreme Speed
Close Combat
Crunch
Lucario is great early game when you have to Revenge kill, or to bring it in on something to Swords Dance during a switch out. Once switched in safely, he hits anything not Ghost/Steel very hard with +2 Sword Dances. Though Lucario is often too slow to handle things such as Gengar, I question the need to have Crunch as it's rarely used compared to Close Combat or Extreme Speed.

Salamence @ Life Orb
Naive
16atk/240s.atk/252spd
Dragon Dance
Outrage
Earthquake
Fire Blast
Salamence is a DD MixMence here he hits like a DD Mence on the physical side, then when he gets walled, he hits just as hard with Draco Meteors when my opponent tries to grab his counter. This makes my DD MixMence hard to counter as he easily only needs one turn to set up to sweep a team and usually falls to Bullet Punches once Life Orb/SR has dealt him enough damage.

Scizor @ Iron Plate
Adamant
248hp/252atk/8spe
Bullet Punch
Pursuit
U-Turn
Superpower
Scizor is my epitome of a revenge killer, he holds a Iron Plate to hit like a CB - Scizor and then U-Turn away or counter switch outs with a Pursuit. Of all my pokemon, Scizor shares many weaknesses with Lucario and so together they are somewhat hindered and vulnerable to Heatran counters. Suicune exists as my teams biggest check to Heatran.
Many teams possess a Steel type to resist a Dragon sweep. Thus my own Steel types exist to pull the roadblocks out of Salamence's way.
The team is not perfect and I always want to try and improve it. Perhaps Thunder Wave support with Rotom to allow Lucario a better field for sweeping teams.
Please give me suggestions!