1) Core offensive : Beedril+Magnezone

 Beedrill @ Beedrillite
Ability: Swarm
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Protect
- U-turn
- Poison Jab
- Knock Off

Magnezon @ Choice Scarf
Ability: Magnet Pull
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk / 30 SpA / 30 Spe
- Thunderbolt
- Volt Switch
- Flash Cannon
- Hidden Power [Fire]



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  2) Core offensive : Manectirc+Fera'


Manectric @ Manectite
Ability: Lightning Rod
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Thunderbolt
- Volt Switch
- Overheat
- Hidden Power [Ice]

Feraligatr @ Life Orb
Ability: Sheer Force
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Swords Dance
- Waterfall
- Crunch
- Aqua Jet

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 3) Core offensive : Hydreigon+Gross'

Hydreigon @ Life Orb
Ability: Levitate
EVs: 16 HP/8 Atk/252 Spa/232 Spe
Mild Nature
-Draco Meteor
-Dark Pulse
-Super Power/Fire Blast
-Flash Cannon/Taunt/Roost/Earthpower

Metagross @ Metagrossite
Ability: Clear Body - Tough Claws
EVs: 252 Atk/4 Def/252 Spe
Jolly or Naive
- Meteor Mash
- Zen Headbutt
- Hammer Arm/Earthquake
- Ice Punch/Grass Knot

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Mega Sharpedo + Swords Dance Pass (gliscor/celebi)

 http://www.smogon.com/forums/threads/oras-good-cores-check-post-714.3524713/page-10