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Hawlucha @ Power Herb
Ability: Unburden
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- High Jump Kick
- Swords Dance
- Acrobatics
- Sky Attack
The combination of Unburden+Sky Attack+Acrobatics works wonders in OU.
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Talonflame @ Life Orb
Ability: Gale Wings
EVs: 80 HP / 252 Atk / 176 Spe
Adamant Nature
- Brave Bird
- Flare Blitz
- Tailwind
- Roost
Gale Wings+Brave Bird is a crazy combination.
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Aegislash @ Weakness Policy
Ability: Stance Change
EVs: 252 HP / 4 Atk / 252 SpA
Quiet Nature
- King's Shield
- Shadow Ball
- Flash Cannon
- Sacred Sword
Although it was recently banned into Ubers, it was in OU long enough to wreck everything up with King's Shield and to count as an "OU threat".