Shell smash

Omastar @ White Herb
Ability: Weak Armor
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Shell Smash
- Hydro Pump
- Ice Beam
- Hidden Power [Grass]

Barbaracle @ Shuca Berry
Ability: Tough Claws
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Shell Smash
- Razor Shell
- Return
- Earthquake

Torkoal @ Life Orb
Ability: Shell Armor
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Shell Smash
- Fire Blast
- Earth Power
- Rapid Spin

Carracosta @ Life Orb
Ability: Solid Rock
EVs: 28 Atk / 228 SpA / 252 Spe
Naive Nature
- Shell Smash
- Hydro Pump
- Stone Edge
- Ice Beam

Magcargo @ White Herb
Ability: Flame Body
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
- Shell Smash
- Lava Plume
- Ancient Power
- Recover

Gorebyss @ Life Orb
Ability: Swift Swim
EVs: 4 HP / 252 SpA / 252 Spe
Modest Nature
- Shell Smash
- Hydro Pump
- Signal Beam
- Hidden Power [Grass]