I made an OU team for the Pokemon City Championships. I still have no losses and I need help to keep on going and not lose. If you have any tips please do reply.
EVs: 252 HP/4 Sp.Atk/252 Speed
This Pokemon is usually my lead, as it sets up 3 Calm Minds first for stat investment. Then I just attack with Dragon Pulse (or Psyshock for Pokemon such as Blissey) and get the opponent's lead to red or OHKO the lead.
Item: Expert Belt
EVs: 4 HP/252 Sp.Atk/252 Speed
This is usually the revenge killer. After Latias gets knocked out, this comes out to get brotherly revenge by using Dragon Pulse or Psyshock. It's an Offensive set, which is why it's my main revenge killer.
Item: Life Orb
EVs: 4 HP/ 252 Sp.Atk/ 252 Speed
When Latios is down, this comes out to steal the show with a STAB Life Orbed Dark Pulse to put as much damage as possible on the opponent. It's a good Special Attaker, so my Dark Pulse does a crapload of damage.
Item: Choice Scarf
EVs: 252 Atk/ 4 Sp.Atk/ 252 Speed
With it's Hidden Ability Moxie, this Pokemon is a powerhouse as soon as a few Attack boosts come up. It has Choice Scarf to increase Speed by 50%, so this thing is faster than Latios. I like to go for Dragon Claw first instead of Outrage, as I hate to be locked into a move that causes confusion.
EVs: 252 HP/ 4 Sp.Atk/ 252 SpD
This is my special wall. It also has some physical bulk to take a Choice Band Bullet Punch from a Scizor like a boss. When all my attackers are all down, I just use my two stallers. I Toxic the Pokemon first unless it's a Poison type or Steel type. I just use an Earthquake on those two then Recover. After Toxic, I would just wait for it to pay off with Ice Beams and Earthquakes.
EVs: 4 HP/ 252 Def/ 252 Sp.Def
This is my main stall because of T-Wave and Stealth Rock. If it gets me past half, there goes Softboiled to get to full HP. Then i have to keep on using Flamethrower, as it's my only attack move. I would replace it with Seismic Toss if i had time.
That's it. Give me some feedback and I'll take your opinions into action. Thanks for your help.