Okay let get this started:
Kingdra @ Choice Specs
Trait: Sniper
Timid Nature
EVs: 252 SpA, 4 SpD, 252 Spe
- Draco Meteor
- Hydro Pump/Surf/Scald
- Ice Beam
- Hidden Power Electric
Draco Meteor and Hydro Pump/Surf/Scald as STAB moves. Ice Beam for coverage and Hidden Power Electric for other Water-types. With Choice Specs equipped it will hit extremely hard.
All of the Dragons don't like status like Will-O-Wisp or Paralyzed. That's why this little birdie is in this team:
Altaria @ Leftovers
Trait: Natural Cure
Calm Nature
EVs: 252 HP, 4 Def, 252 SpD
- Dragon Pulse
- Heal bell
- Roost
- Perish Song/Toxic/Roar
Dragon Pulse For STAB and preventing to be a Taunt bait. Heal Bell for getting your team cured of status. Roost for backing the birdie up. Perish Song/Toxic for stalling the opponent. Roar for phazing.
Lets start sweeping with these guys:
Salamence @ Choice Scarf
Trait: Moxie
Naive Nature
252 Atk, 4 SpA, 252 Spe
- Outrage/ Dragon Claw
- Fire Blast
- Earthquake
- Brick Break
Outrage/ Dragon Claw is STAB. Fire Blast covers Skarmory. Earthquake for those Steels. And Brick Break as filler.
Kyurem-B @ Choice Band
Trait: Teravolt
Adamant Nature
40 Hp, 252 Atk, 216 Spe
- Outrage
- Fusion Bolt
- Freeze Shock
- Dragon Claw
Outrage and Dragon Claw as STAB move. Two Dragon moves because of the confusion of Outrage. Fusion Bolt as signature move and a strong Electric move because of Choice Band. Freeze Shock as second STAB and 30% chance to freeze.
All-out Attacker:
Latios @ Life Orb
Trait: Levitate
Timid Nature
EVs: 4 Hp, 252 SpA, 252 Spe
- Draco Meteor
- Psyshock
- Thunderbolt
- Ice Beam
Draco Meteor and Psyshock for STAB. BoltBeam combo for coverage. Life Orb for extra power.
Last but not least:
Hydreigon @ Expert Belt
Trait: Levitate
Adamant Nature
4 Hp, 252 Atk, 252 Spe
- Outrage
- Superpower
- Stone Edge
- Earthquake
Outrage for STAB, Superpower for the Steel and Ice Pokemon. EdgeQuake combo for coverage.
Hope it helped.