Cass is best

Pikku-Myy (Mew) @ Leftovers
Ability: Synchronize
Level: 50
EVs: 100 HP / 252 SpA / 156 Spe
Modest Nature
- Stealth Rock
- Knock Off
- Psyshock
- Earth Power

Zenphalia (Skarmory) @ Shed Shell
Ability: Sturdy
Level: 50
EVs: 244 HP / 240 Def / 24 Spe
Impish Nature
- Brave Bird
- Roost
- Whirlwind
- Defog

Potatoes (Dugtrio) @ Choice Scarf
Ability: Arena Trap
Level: 50
EVs: 4 HP / 248 Atk / 84 SpD / 172 Spe
Lonely Nature
- Earthquake
- Night Slash
- Memento
- Hidden Power [Ice]

Cassie (Dragalge) @ Assault Vest
Ability: Poison Point
Level: 50
EVs: 244 HP / 252 SpA / 12 SpD
Modest Nature
IVs: 0 Atk
- Draco Meteor
- Sludge Wave
- Focus Blast
- Scald

NotADirtyPun (Cloyster) @ Lum Berry
Ability: Skill Link
Level: 50
EVs: 252 Atk / 12 SpD / 244 Spe
Adamant Nature
- Shell Smash
- Icicle Spear
- Rock Blast
- Razor Shell

Pawn (Rotom) @ Choice Scarf
Ability: Levitate
Level: 50
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk / 30 Def
- Thunderbolt
- Volt Switch
- Hidden Power [Ice]
- Trick