This is my OU team, and it revolves around clearing the field for a CM Latias sweep
At a glance :


Team Building Process:
I want to center my team around Latias

Latias is weak to Ghost, Dragon, Ice, and Bug. Scizor can knock all of those out immediately, as well as being a huge threat
Now I want someone who can set up rocks and cover Scizors fire weakness, so Swampert is my best bet.

Now, Swampert has a 4x grass weak, and I want a wall breaker than resists Grass. I have to decide between Heatran and Salamence, but ultimately I choose Salamence.

Now, I want a set-up pokemon that isn't afraid of Blissey/Hippodown/Skarmory. Bulky-Gyara is my best bet.

Now, for my final pokemon, I want a pokemon that has good synergy with the rest of my team, as well as being able to dish out status. It's between Celebi, Jirachi, and Slowbro. Ultimately, I choose Jirachi because Celebi gives me another Ice Weak, and Slowbro isn't as much of a team player as Jirachi.


Break it down :
@ Leftovers
Relaxed
252HP / 252 Def / 4 Atk
Stealth Rock
Protect
Ice Beam
Earthquake
SR lead, simple. Ice Beam for dragons late game, EQ for STAB and Heatran, Protect. 4x fire resist for Scizor and Jirachi
@ Life Orb
Naive
16Atk / 240 SpA / 252 Speed
Draco Meteor
Outrage
Fire Blast
Earthquake
New Mixmence, his job is to break down walls that will annoy Latias lategame. When Jirachi is about to be EQ'd, I switch to him or Gyara
@ Leftovers
Adamant
156 HP / 72 Atk / 96 Def / 184 Spe
Dragon Dance
Waterfall
Stone Edge
Taunt
Bulky-Gyara. Taunt is to mess with blissey/hippodown/skarm while I try to set up. Waterfall for STAB and Stone for Flyers that resist Waterfall to give great coverage in general. When Jirachi is about to be EQ'd I switch to him or Salamence
@ Choice Band
Adamant
244 HP / 252 Atk / 12 Spe
Bullet Punch
Superpower
U-Turn
Pursuit
Absolute standard, no comments other than Steel to resist Dragon attacks coming towards Latias and Salamence
@ Leftovers
Impish
240 HP / 160 Def / 32 Spe / 76 SpD
Wish
U-Turn
Ice Punch
Thunder Wave
Wish for team support, U-Turn to scout, Ice Punch for dragons, and T-Wave for status support. Switch to him or Scizor on incoming dragon attacks. Jirachi hasn't really done much and he is the team member I am most likely to change. I'm considering Celebi or Heatran if I do change.
And the Coup De Grace
@ Leftovers
Modest
4 HP / 252 SpA / 252 Spe
Calm Mind
Surf
Dragon Pulse
Recover
The Centerpiece who I built my team around, and all around my favorite pokemon. Recover because its bulky, CM for obvious reasons, and Surf + Dragon Pulse so I'm resisted by Empoleon only
I know that Latias is going to be voted Uber, I will have to replace it, but until that time I will not worry about it.
Thank you.
At a glance :






Team Building Process:
I want to center my team around Latias

Latias is weak to Ghost, Dragon, Ice, and Bug. Scizor can knock all of those out immediately, as well as being a huge threat


Now I want someone who can set up rocks and cover Scizors fire weakness, so Swampert is my best bet.



Now, Swampert has a 4x grass weak, and I want a wall breaker than resists Grass. I have to decide between Heatran and Salamence, but ultimately I choose Salamence.




Now, I want a set-up pokemon that isn't afraid of Blissey/Hippodown/Skarmory. Bulky-Gyara is my best bet.





Now, for my final pokemon, I want a pokemon that has good synergy with the rest of my team, as well as being able to dish out status. It's between Celebi, Jirachi, and Slowbro. Ultimately, I choose Jirachi because Celebi gives me another Ice Weak, and Slowbro isn't as much of a team player as Jirachi.






Break it down :

Relaxed
252HP / 252 Def / 4 Atk
Stealth Rock
Protect
Ice Beam
Earthquake
SR lead, simple. Ice Beam for dragons late game, EQ for STAB and Heatran, Protect. 4x fire resist for Scizor and Jirachi

Naive
16Atk / 240 SpA / 252 Speed
Draco Meteor
Outrage
Fire Blast
Earthquake
New Mixmence, his job is to break down walls that will annoy Latias lategame. When Jirachi is about to be EQ'd, I switch to him or Gyara

Adamant
156 HP / 72 Atk / 96 Def / 184 Spe
Dragon Dance
Waterfall
Stone Edge
Taunt
Bulky-Gyara. Taunt is to mess with blissey/hippodown/skarm while I try to set up. Waterfall for STAB and Stone for Flyers that resist Waterfall to give great coverage in general. When Jirachi is about to be EQ'd I switch to him or Salamence

Adamant
244 HP / 252 Atk / 12 Spe
Bullet Punch
Superpower
U-Turn
Pursuit
Absolute standard, no comments other than Steel to resist Dragon attacks coming towards Latias and Salamence

Impish
240 HP / 160 Def / 32 Spe / 76 SpD
Wish
U-Turn
Ice Punch
Thunder Wave
Wish for team support, U-Turn to scout, Ice Punch for dragons, and T-Wave for status support. Switch to him or Scizor on incoming dragon attacks. Jirachi hasn't really done much and he is the team member I am most likely to change. I'm considering Celebi or Heatran if I do change.
And the Coup De Grace

Modest
4 HP / 252 SpA / 252 Spe
Calm Mind
Surf
Dragon Pulse
Recover
The Centerpiece who I built my team around, and all around my favorite pokemon. Recover because its bulky, CM for obvious reasons, and Surf + Dragon Pulse so I'm resisted by Empoleon only
I know that Latias is going to be voted Uber, I will have to replace it, but until that time I will not worry about it.
Thank you.