So, if you have those two, your other 4 should be:
Shuckle (excellent wall) with Double Team, Mud Slap, Toxic, and Protect. (Toxic kills them while they can't hit)
He should hold a Hp restoring berry, or Leftovers.
Armaldo (goot for getting rid of those pesky Flying and Fire Types) with Metal Claw (covering Rock Weakness), Ancient Power (STAB and is physical in Gen 3), Brick Break, and Furry Cutter.
He should hold a Hard Stone
Dustox with Silver Wind, Psychic, Sludge Bomb, Giga Drain
He should hold Bright Powder
Volbeat with thunderbolt, Signal beam, Attract, Double Edge
Should hold Silk Scarf