Mew
Mew is OK, although I would use this set instead:
Mew @ Leftovers:
Trait: Synchronise
EVs: 252 Speed / 252 HP / 4 Sp.Def
Jolly Nature
- Swords Dance
- Baton Pass
- Stealth Rock
- Zen Headbutt
This set is also meant to setup Swords Dance and Baton Pass to Sharapedo, Crobat or Flygon.
Crobat
Your set is OK. But I would be using physical Crobat, unless you plan a Nasty Plot Set.
Take one of my two set; whichever you prefer:
Crobat @ Flying Gem:
Trait: Infiltrator
EVs: 252 Atk / 252 Speed / 4 HP
Adamant Nature
- Acrobatics
- Cross Poison
- U-Turn
- X-Scissor
OR
Crobat @ Focus Sash:
Trait: Infiltrator
EVs: 252 Sp.Atk / 252 Speed / 4 HP
Modest Nature
- Nasty Plot
- Air Slash
- Sludge Bomb
- Heat Wave
Sharapedo
All right :)
However, Dr.Flame's suggestions are nice;
- Protect > Aqua Jet
- Waterfall > Ice Fang
which leads you to Protect, Waterfall, Earthquake and Crunch.
Flygon
E-Quake > Thunder Punch. Otherwise, all right :)
Doublade
As it is a filler, you can replace it with Chandelure because you desperately need a special attacker.
@ Choice Scarf:
Trait: Flash Fire
EVs: 252 Sp.Atk / 252 Speed / 4 Sp.Def
Timid Nature
- Fire Blast
- Energy Ball
- Shadow Ball
- Psychic
Exploud
Guess it is OK. But, Exploud :/ This means mediocre defensive. Fooled by its impressive HP do not be. Amazed by it's nice special attack and large movepool be not.
I may recommend you to change it. Perhaps a Zapdos will fit in.
@ Life Orb:
Trait: Lightingrod
EVs: 252 Speed / 252 Sp.Atk / 4 Sp.Def
Timid Nature
- Thunderbolt
- Heat Wave
- U-Turn
- Hidden Power {
ICE
}
Hope this helps.