Lucario
Atk 110, Sp. Atk 115, Speed 90
Ability: Justified
Item: Life Orb/ Focus Sash
EVs: 252 Speed, 180 Sp. A, 76 Atk
 Aura Sphere
 Close Combat
 Extreme speed/ Bullet Punch
 Swords Dance
Kyurem (ordinary form)
Atk 130, Sp. Atk 130, Speed 95
Ability: Pressure
Item: Life Orb
EVs: 252 Speed, 200 Sp. A, 56 Atk
 Draco Meteor
 Ice Beam
 Outrage
 Dragon Claw/ Earth Power
Venusaur
Atk 82, Sp. Atk 100, Speed 80
Ability: Chlorophyll
Item: Black Sludge/ Life Orb
EVs: 252 Speed, 200 Atk, 56 Sp. A
 Growth
 Giga Drain
 Seed Bomb
 Earthquake
(best used in the sun)
Salamence
Atk 135, Sp. Atk 110, Speed 100
Ability: Moxie/ Intimidate
Item: Life Orb/ Choice Scarf
EVs: 180 Sp. Atk, 252 Speed, 76 Atk
 Draco Meteor
 Outrage
 Fire Blast
 Earthquake
EDIT: I didn't see the U-Turn requirement.
the above can't learn U-Turn, but they're good Mixed sweepers, so I'll leave their sets up for consideration
Zoroark
Atk 105, Sp. Atk 120, Speed 105
Ability: Illusion
Item: Choice Scarf/ Leftovers/ Life Orb
EVs: 252 Speed, 128 Sp. Atk, 128 Atk
 Punishment (to deal with calm mind)/ Foul Play (to deal with Bulk Up)
 Dark Pulse
 Nasty Plot/ Flamethrower (to deal with bug types)
 U-Turn
Hydreigon
Atk 105, Sp. Atk 125, Speed 98
Ability: Levitate
Item: Life Orb
EVs: 252 Speed, 180 Atk, 76 Sp. Atk
 Draco Meteor
 Earthquake
 Roost/ Fire Blast
 U-Turn
Jirachi
Atk: 100, Sp. Atk 100, Speed 100
Ability: Serene Grace
Item: Leftovers
 Body Slam
 Iron Head
 Thunderbolt/ Hidden Power Ice
 U-Turn