UU go.

[jc_rcw]

Fearow (M) @ Choice Band
Trait: Keen Eye
EVs: 4 HP / 252 Atk / 252 Spd
Jolly Nature (+Spd, -SAtk)
- Double-Edge
- Drill Peck
- Hidden Power [Ground]
- Quick Attack

Sandslash (F) @ Leftovers
Trait: Sand Veil
EVs: 104 HP / 252 Atk / 152 Spd
Adamant Nature (+Atk, -SAtk)
- Earthquake
- Hidden Power [Bug]
- Rock Slide
- Swords Dance

Blastoise (M) @ Leftovers
Trait: Torrent
EVs: 252 HP / 148 Def / 40 Spd / 68 SAtk
Bold Nature (+Def, -Atk)
- Ice Beam
- Rest
- Sleep Talk
- Surf

Omastar (M) @ Leftovers
Trait: Swift Swim
EVs: 252 HP / 136 Def / 120 SAtk
Bold Nature (+Def, -Atk)
- Hidden Power [Grass]
- Ice Beam
- Spikes
- Toxic

Magmar (F) @ Leftovers
Trait: Flame Body
EVs: 4 HP / 252 Spd / 252 SAtk
Timid Nature (+Spd, -Atk)
- Flamethrower
- Hidden Power [Grass]
- Substitute
- Thunderpunch

Banette (F) @ Salac Berry
Trait: Insomnia
EVs: 76 HP / 252 Atk / 180 Spd
Adamant Nature (+Atk, -SAtk)
- Destiny Bond
- Hidden Power [Fighting]
- Shadow Ball
- Substitute

[Synchronize]

Your team has a large Synchronize weak.

IMO you need some better options than HP Crass 0ma to handle quaggy, since Thief is obviously a cooler option on a Spikes set.

[rekt]

He has HP Grass on Magmar also. I find Double-Edge Fearow a little bit suicidal as you don't have hypno to give it wish support. also, you have a huge manectric / electabuzz / pikachu weakness, as thunderbolt kills 3 of your pokes easily, surf kills 2 others, and then bannete cant do anything

[jc_rcw]

I noticed I have electric/hp grass weak.