Dang I can't wait until Black/White comes out!!! I'm so anxious waiting I decided to make yet another team.
Team building process:
First I wanted Umbreon. He's the coolest looking shiny and has great Special defense and good support moves, like Wish and Heal Bell.
Next I picked Zapdos to cover Umbreon's weaknesses and to be a Pressure staller/Scizor counter.
Next I wanted a scarf-Tar to deal with Starmie, Gengar, and Azelf.
Next I wanted a bulky water and stealth-rocker so of course I picked Swampert with his excellent defense and only 1 weakness.
I then picked my favorite pokemon from 4th Gen, which is Infernape. He's specially based mixed attacker.
Last but not least was a rapid spinner and spike layer so I picked special defensive Forretress.
Finally I realized I had no rapid spin blocker so I picked Rotom-H(which sucks b/c spamming Pressure/Roost is so much fun), which still covers Umbreon's weaknesses and is a Scizor counter, as well as provides W-O-W support.
After battling some more and reading some comments Umbreon did turn out to be dead weight. So I switched to Vaporeon instead.
I didn't want 2 water pokemon on my team so I switched Swampert out for a defensive Zapdos.
I now need a Stealth Rock layer so I switched Infernape(who died too quickly) to Gliscor.
Now for a more in-depth description:
Lead/Special Defensive pokemon/Spiker/Rapid Spinner:
Forretress - Leftovers
Careful
252 HP / 4 Def / 252 SpD
~ Stealth Rock
~ Toxic Spikes
~ Payback
~ Rapid Spin
This is a specially defensive set yet still has enough physical bulk to live through some physical attacks. He easily sets up on common leads like Swampert and Metagross. Since he has such good resistances to moves like Ice Beam, Draco Meteor and Shadow Ball, I like to try and save him for later in the game so that's why he has Payback instead of Explosion. Stealth Rock and Toxic Spikes help out to poison opposing bulky waters on the switch and help Tyrannitar to get some OHKOs. Rapid Spin is to spin away opposing Stealth Rocks, Spikes, and TS's. With sandstorm help from Tyrannitar as well as Stealth Rock, Forretress can 3hko opposing Rotoms with Payback.
Physical Defensive pokemon/Status Inducer #1
Rotom-H - Leftovers
Bold
252 HP / 168 Def / 88 Spe
~ Discharge
~ Will-O-Wisp
~ Overheat
~ Shadow Ball
This is my Scizor, Metagross, and Lucario counter and spin blocker(sucks he loses his ghost typing in B/W). I chose Discharge to maybe get a paralysis on Starmie. W-O-W is for Machamp, Scizor, Metagross, Tyranitar, etc. He has good synergy with Swampert(who takes on Heatran) and Infernape(who can take on Blissey). 88 speed evs allow him to outspeed Scizor.
Physical Attacker
Tyranitar - Choice Scarf
Jolly
4 HP / 252 Atk / 252 Spe
Pursuit
Earthquake
Crunch
Stone Edge
This is my main physical attacker and what a beast he is! I like to switch in Rotom-H on Starmie's Rapid Spin(whenever that may be). Then switch to my Tyranitar to take a Hydro Pump which does hardly anything from a 252 HP/252 Spe Timid Starmie in standstorm. Then Pursuit for the kill. He's also my counter for ghosts. W-O-W doesn't scare him b/c Umbreon can just heal it off for him. Stone Edge is for flyers like Zapdos and EQ is for Lucario, Metagross, and Heatran...as well as opposing Tyranitars. He also sets up sand storm to help with the stalling aspect of my team.
Taunter
Gliscor - Leftovers (Sand Veil ability)
Jolly
252 HP / 4 Def / 252 Spe
~ Knock Off
~ Earthquake
~ Roost
~ Taunt
Gliscor has good synergy with Tyrannitar. Gliscor takes Earthquake and fighting moves while Tyrannitar can take the Ice Beams b/c of his bulk under Sandstorm. Gliscor also has the annoying Sand Veil ability ti go with Tyranitar's sand storm. He can Taunt pokemon like Rotom, Hippodown, and stat-uppers and Roost off the damage. Earthquake is for coverage and to hit Lucario and Metagross. Knock off is to remove opponent's leftovers, choice bands, scarfs, etc.
Physical Wall/Pressure Staller/Shuffler
Zapdos - Leftovers
Bold
248 HP / 228 Def / 32 Spe
~ Thunderbolt
~ Roost
~ Hidden Power Grass
~ Roar
Zapdos is my secondary Scizor, Lucario and Gyarados counter and my Pressure staller. Thunderbolt can wear down most pokemon. HP Grass is for Hippodown and Swampert. Gliscor and Tyranitar help deal with Blissey and other Tyranitars with high special defense. The evs allow me to switch into Stealth Rock 5 times if it's on the field and Forretress hasn't had a chance to Rapid Spin yet. Roar is to scout and rack up Stealth Rock/Toxic Spikes damage.
Bulky Water(every team needs one)/Wisher
Vaporeon - Leftovers
Bold
248 HP / 224 Def / 36 SpD
~ Wish
~ Protect
~ Surf
~ Toxic
My good 'ol bulky water and main Heatran counter. Wish and Protect are to help Vappy and rest of my team out. Since Rotom and Forretress have no way of healing besides leftovers, they appreciate the Wish. Toxic, Vaporeon can stall out most pokemon like Suicune, Tyranitar, Gyarados, etc that can't hurt it. Vaporeon can also take Ice Beams aimed at Gliscor while Gliscor is immune to Thunderbolt. She also appreciates the entry hazards because of all the switches she causes.
Well there you have it. Please rate, critic, tear appart as you see fit. :) Thanks for reading.
Team building process:

First I wanted Umbreon. He's the coolest looking shiny and has great Special defense and good support moves, like Wish and Heal Bell.


Next I picked Zapdos to cover Umbreon's weaknesses and to be a Pressure staller/Scizor counter.



Next I wanted a scarf-Tar to deal with Starmie, Gengar, and Azelf.




Next I wanted a bulky water and stealth-rocker so of course I picked Swampert with his excellent defense and only 1 weakness.





I then picked my favorite pokemon from 4th Gen, which is Infernape. He's specially based mixed attacker.






Last but not least was a rapid spinner and spike layer so I picked special defensive Forretress.






Finally I realized I had no rapid spin blocker so I picked Rotom-H(which sucks b/c spamming Pressure/Roost is so much fun), which still covers Umbreon's weaknesses and is a Scizor counter, as well as provides W-O-W support.






After battling some more and reading some comments Umbreon did turn out to be dead weight. So I switched to Vaporeon instead.






I didn't want 2 water pokemon on my team so I switched Swampert out for a defensive Zapdos.






I now need a Stealth Rock layer so I switched Infernape(who died too quickly) to Gliscor.
Now for a more in-depth description:
Lead/Special Defensive pokemon/Spiker/Rapid Spinner:
Forretress - Leftovers
Careful
252 HP / 4 Def / 252 SpD
~ Stealth Rock
~ Toxic Spikes
~ Payback
~ Rapid Spin
This is a specially defensive set yet still has enough physical bulk to live through some physical attacks. He easily sets up on common leads like Swampert and Metagross. Since he has such good resistances to moves like Ice Beam, Draco Meteor and Shadow Ball, I like to try and save him for later in the game so that's why he has Payback instead of Explosion. Stealth Rock and Toxic Spikes help out to poison opposing bulky waters on the switch and help Tyrannitar to get some OHKOs. Rapid Spin is to spin away opposing Stealth Rocks, Spikes, and TS's. With sandstorm help from Tyrannitar as well as Stealth Rock, Forretress can 3hko opposing Rotoms with Payback.
Physical Defensive pokemon/Status Inducer #1
Rotom-H - Leftovers
Bold
252 HP / 168 Def / 88 Spe
~ Discharge
~ Will-O-Wisp
~ Overheat
~ Shadow Ball
This is my Scizor, Metagross, and Lucario counter and spin blocker(sucks he loses his ghost typing in B/W). I chose Discharge to maybe get a paralysis on Starmie. W-O-W is for Machamp, Scizor, Metagross, Tyranitar, etc. He has good synergy with Swampert(who takes on Heatran) and Infernape(who can take on Blissey). 88 speed evs allow him to outspeed Scizor.
Physical Attacker
Tyranitar - Choice Scarf
Jolly
4 HP / 252 Atk / 252 Spe
Pursuit
Earthquake
Crunch
Stone Edge
This is my main physical attacker and what a beast he is! I like to switch in Rotom-H on Starmie's Rapid Spin(whenever that may be). Then switch to my Tyranitar to take a Hydro Pump which does hardly anything from a 252 HP/252 Spe Timid Starmie in standstorm. Then Pursuit for the kill. He's also my counter for ghosts. W-O-W doesn't scare him b/c Umbreon can just heal it off for him. Stone Edge is for flyers like Zapdos and EQ is for Lucario, Metagross, and Heatran...as well as opposing Tyranitars. He also sets up sand storm to help with the stalling aspect of my team.
Taunter
Gliscor - Leftovers (Sand Veil ability)
Jolly
252 HP / 4 Def / 252 Spe
~ Knock Off
~ Earthquake
~ Roost
~ Taunt
Gliscor has good synergy with Tyrannitar. Gliscor takes Earthquake and fighting moves while Tyrannitar can take the Ice Beams b/c of his bulk under Sandstorm. Gliscor also has the annoying Sand Veil ability ti go with Tyranitar's sand storm. He can Taunt pokemon like Rotom, Hippodown, and stat-uppers and Roost off the damage. Earthquake is for coverage and to hit Lucario and Metagross. Knock off is to remove opponent's leftovers, choice bands, scarfs, etc.
Physical Wall/Pressure Staller/Shuffler
Zapdos - Leftovers
Bold
248 HP / 228 Def / 32 Spe
~ Thunderbolt
~ Roost
~ Hidden Power Grass
~ Roar
Zapdos is my secondary Scizor, Lucario and Gyarados counter and my Pressure staller. Thunderbolt can wear down most pokemon. HP Grass is for Hippodown and Swampert. Gliscor and Tyranitar help deal with Blissey and other Tyranitars with high special defense. The evs allow me to switch into Stealth Rock 5 times if it's on the field and Forretress hasn't had a chance to Rapid Spin yet. Roar is to scout and rack up Stealth Rock/Toxic Spikes damage.
Bulky Water(every team needs one)/Wisher
Vaporeon - Leftovers
Bold
248 HP / 224 Def / 36 SpD
~ Wish
~ Protect
~ Surf
~ Toxic
My good 'ol bulky water and main Heatran counter. Wish and Protect are to help Vappy and rest of my team out. Since Rotom and Forretress have no way of healing besides leftovers, they appreciate the Wish. Toxic, Vaporeon can stall out most pokemon like Suicune, Tyranitar, Gyarados, etc that can't hurt it. Vaporeon can also take Ice Beams aimed at Gliscor while Gliscor is immune to Thunderbolt. She also appreciates the entry hazards because of all the switches she causes.
Well there you have it. Please rate, critic, tear appart as you see fit. :) Thanks for reading.