Your team looks so well ballanced; iit will be har to take down but they still has its own properties like:
Crobat looks delightful, it's a perfect staller. No comments.
DRAPION
Drapion (M) @ Razor Claw
Trait: Sniper
Ev's: 126 HP / 126 Atk / 252 Sdef / 4 Spd
Adamant Nature (+Atk, - SAtk)
- Night Slash
- Cross Poison/Bick Break
- Aqua Tail/Ice Fang
- Swords Dance
WEEZING
That Weezing is amazing for a poison team. It covers up all your weaknesses and gives you more confidence against the horrible choice bander abusers.
Weezing (M) @ Lum Berry/Black Sludge
Trait: Levitate
Ev's: 252 HP / 252 Def / 4 SAtk
Bold Nature (+Def, - SDef)
- Clear Smog
- Fire Blast
- Will-o-Wisp
- Pain Split/Stockpile (If you want more resistence)
GENGAR
Gengar (F) @ Life Orb
Trait: Levitate
Ev's: 252 SAtk / 252 Spd / 4 HP
Timid Nature (+Spd, -Atk)
- Shadow Ball
- Focus Blast
- Thunderbolt (coverage)/ Hidden Power (Fire)
- Destiny Bond
TOXICROAK
Toxicroak (M) @ Black Sludge (Many opponents will try to use trick or something and Black Sludge is bad for them)
Trait: Dry Skin
Ev's: 252 Atk / 252 Spd / 4 HP
Adamant Nature (+Atk, -SAtk)
- Sucker Punch
- Drain Punch
- Ice Punch
- Swords Dance
This Pokémon is scary when is boosted (just once) with Swords Dance. Just try to guess if they attack or not.
And finally ...
NIDOQUEEN
I suppose this is your lead, and it functions well.
Nidoqueen (F) @ Sitrus Berry
Trait: Rivalry
Ev's: 252 HP / 126 Def / 130 SDef
Sassy Nature (+SDef, -Spd)
- Earth Power
- Super Fang (sounds great but is more comfortable a move to cover)/Flamethrower/Ice Beam
- Dragon Tail
- Stealth Rocks/ Toxic Spikes
OTHER OPTION
VENOMOTH (Just Generation V)
This Pokémon is awesome beacuse in this generation it gains THE BEST MOVE CREATED EVER: Quiver Dance, add this it's wonderful ability: Tinted Lens. It's a Monter, if you want you can pass your boosts to another teammate.
Trait: Dry Skin
Ev's: 252 HP / 4 SpA / 252 Spe
Timid Nature (+SpD, -AtK)
- Sleep Powder
- Bug Buzz
- Baton Pass
- Quiver Dance
This set is easy to use, just sleep, boost and (Two options: Sweep or Pass) end them.
I hope this helps