Item: Focus-sash
Ability: Wonder-skin
Nature: Timid
EVs: 252 S.attack, 252 Speed, 6 Hp
Sleep-powder: Sleep and Boost
Q-Dance: BOOST
Baton-pass: Pass the boost
Bug-buzz: You need an offensive move
Item: Life-orb
Ability: Sheer-force
Nature: Modest
EVs: 252 S.attack, 252 Speed, 6 Hp
Ice-beam: Coverage
Thunderbolt: Coverage
Flamethrower: Coverage
Earth-power: STAB
Item: Focus-sash
Ability: Swarm
Nature: Jolly
EVs: 252 Attack, 252 Speed, 6 Hp
Swords-dance: Boosting
X-Scissor: STAB
Earthquake: Coverage
Rock-Slide: Coverage
Item: Leftovers
Ability: Sniper
Nature: Jolly
EVs: 252 Attack, 252 Speed, 6 Hp
Night-slash: STAB+High Crit
Earthquake: Coverage
Brick-Break: Coverage
Toxic-Spikes/Swords-dance: Entry Hazard or Boosting move
Item: Flying-Gem
Ability: Inner-focus
Nature: Jolly
EVs: 252 Attack, 252 Speed, 6 Hp
Acrobatics: STAB
U-turn: Coverage+Switch
Steel-wing: Coverage
Hypnosis: Sleep
Item: Big-root
Ability: Levitate
Nature: Timid
EVs: 252 S.attack, 252 Speed, 6 Hp
Shadow-ball: STAB
Psychic: Coverage
Giga-drain: Coverage and Healing
Thunderbolt: Coverage
The plan is Venomoth puts the opponent to sleep and pass boosts to Nidoking or Gengar and then they Sweep. When they go down Scolipede, Crobat, and Drapion can Physical sweep.