I am open to item suggestions, but I don't care about natures.
Here it is..
Samurott
Surf
Ice Beam
Megahorn
Aqua Jet

Metagross
Psychic or Psyshock
Meteor Mash
Earthquake
Hammer Arm?

Chandelure
Fire Blast or Flamethrower
Confuse Ray
Shadow Ball
???

Eelektross
Thunder Wave
Thunderbolt
Dragon Claw
Crunch

Virizion
Leaf Blade
Close Combat
Stone Edge
???

Crobat
Toxic
Acrobatics
Fly or Sky Attack
Venoshock