Need help with this team! Its for maingame and showdown(OU)

Question

Skarmory @ Leftovers
Ability: Sturdy
EVs: 252 HP / 232 Def / 24 Spe
Bold Nature
- Defog
- Stealth Rock
- Roost
- Whirlwind
Stealth rock user and defogger

Slowbro @ Shell Bell
Ability: Regenerator
EVs: 252 def / 252 SpA / 4 SpD
Modest Nature
- Scald
- Flamethrower
- Calm Mind
- Psyshock

Special sweeper and physical wall

Noivern @ Choice Scarf
Ability: Infiltrator
EVs: 4 Atk / 252 SpA / 252 Spe
Timid Nature
- Draco Meteor
- Flamethrower
- U-turn
- Air Slash
My special sweeper and will receive the tail glow from volbeat

Electivire @ Expert Belt
Ability: Motor Drive
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Thunder Punch
- Fire Punch
- Ice Punch
- Earthquake
Physical sweeper

Volbeat (M) @ Focus Sash
Ability: Prankster
EVs: 252 HP / 4 SpA / 252 Spe
Timid Nature
- Baton Pass
- Bug Buzz
- Tail Glow
- Encore
My baton passer to noivern

Scizor @ Scizorite
Ability: Technician
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Bullet Punch
- Swords Dance
- Bullet Punch
- Pursuit

My physical sweeper and he sure is a good one

Comments

You should give Noivern Choice Specs. Also, Cell Battery doesn't work with Motor Drive. Skarmory should have Brave Bird as it is a sitting steel duck when under taunt.

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Here are a few changes.

Noivern @ Choice Specs/Life Orb
EVs 252 Sp.Att/252 Spd/4 Sp.Def
Timid Nature
Moves-
-Draco Meteor
-Flamethrower
-Air Slash
-Focus Blast

This set gives really good coverage and works well with Choice specs and my next Pokemon Rotom-W.

Rotom-W @ Chesto Berry
EVs 252 HP/212 Def/44 Spd OR 252 HP/212 Sp.Def/44 Spd
Bold OR Calm Nature
Moves-
-Volt Switch
-Hydro Pump
-Will-O-Wisp
-Rest

Volt Switch allows you to conveniently switch out to the required Pokemon.

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Why flag?

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is this OU?

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No its main game and showdown