Meta-Breaker - an OU Team

Question

Skarmory @ Leftovers
Ability: Sturdy
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
- Stealth Rock
- Spikes
- Roost
- Whirlwind
Standard Skarmory set. Sets up hazards and takes physical hits.

Chansey @ Eviolite
Ability: Natural Cure
EVs: 248 HP / 200 Def / 60 SpD
Calm Nature
- Toxic
- Seismic Toss
- Soft-Boiled
- Heal Bell
Taes special hits and survives keldeo's secret sword.

Latias-Mega @ Latiasite
Ability: Levitate
EVs: 248 HP / 252 Def / 8 SpD
Bold Nature
- Roost
- Defog
- Shadow Ball
- Psyshock
Takes any hits skarmory and chansey can't, and removes hazards.

Azumarill @ Sitrus Berry
Ability: Huge Power
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Belly Drum
- Aqua Jet
- Waterfall
- Play Rough
belly drum azumarill is a force to be reckoned with, especially with hazards up.

Tornadus-Therian @ Life Orb
Ability: Regenerator
EVs: 4 Atk / 252 SpA / 252 Spe
Hasty Nature
- Hurricane
- U-turn
- Superpower
- Heat Wave
A very fast pokemon that can hit really hard. It is my best answer to ferrothorn, but that usually isn't a problem

Keldeo @ Choice Scarf
Ability: Justified
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Secret Sword
- Scald
- Icy Wind
- Hidden Power [Fire]
scarfer and heatran counter. This team is really weak to heatran without it. HP fire is for ferrothorn in case tornadus dies.

Comments

It's not really meta breaking...in fact it's actually 'The Meta'. It's good, but apart from Skarm it's standard. Good team, but not anti-meta xP

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Make Skarmory a Specially Defensive set. You're currently too weak to Mega Gardevoir and the "Standard" Mega Diancie. Replace either Stealth Rock or Spikes for Iron Head

If Stealth Rock was removed, give it to Chansey instead over Toxic
If Spikes was removed, give Chansey Thunder Wave over Toxic. Twave will help you with Mega Alakazam, and nullify Serperior as well.

I suggest running the support Mega Latias set over what you're currently running. It helps you deal with Mega Metagross and Mega Lopunny, two big threats.
Latias @ Latiasite
Ability: Levitate
EVs: 248 HP / 68 Def / 192 Spe
Timid Nature
- Thunder Wave
- Defog / Ice Beam / Hidden Power [Fire]
- Recover
- Dragon Pulse / Thunderbolt
As I see it, Defog support isnt really valuable to your team since you dont have a super Rock weak Pokemon (Tornadus-T has regenerator to semi negate rocks). If you dont run Defog, run Dragon Pulse + Hidden Power Fire for good coverage, and a way to hit Ferrothorn and Scizor (REMEMBER TO TAKE AWAY 4 DEFENSE EVS AND ADD THEM TO SPEED TO NEGATE THE IV LOST). Otherwise, you can opt to run BoltBeam coverage. If you keep Defog, always use Dragon Pulse.

Run the standard set on Azumarill. Max speed does nothing since both Mega Venusaur AND rotom-w ev specifically for Azu. Also, Waterfall is useless in comparison to Return / Knock Off / Ice Punch.
Azumarill @ Sitrus Berry
Ability: Huge Power
EVs: 92 HP / 252 Atk / 164 Spe
Adamant Nature
- Belly Drum
- Aqua Jet
- Play Rough
- Knock Off / Return / Ice Punch
(you can subtract 8 evs from HP and add to Speed for Speed Creeps)

Tornadus-T is fine, although you can try Knock Off over Heat Wave, since Ferrothorn takes a lot from Superpower and/or Hurricane anyways. Helps you beat opposing Chansey as well.

For the last slot, Hidden Power Fire Keldeo is a poor choice since a x4 HP Fire reaches a base power of 240, while Secret Sword reaches a base power of 255. Since Ferrothorn's EV to check Kyurem-B and Mega Alakazam now, the Physical and Special defense "splits" between HP Fire and Secret Sword is very minimal. So add Hydro Pump in the last slot to have a way to OHKO Mega Manectric after Rocks, who currently DESTROYS your team.