STAB Rain Offense

Pelipper @ Damp Rock
Ability: Drizzle
EVs: 248 HP / 252 Def / 8 SpA
Bold Nature
- Roost
- Hurricane
- Steam Eruption
- U-turn

Swampert-Mega @ Swampertite
Ability: Swift Swim
EVs: 168 HP / 252 Atk / 88 Spe
Adamant Nature
- Crabhammer
- Precipice Blades
- Superpower
- Shore Up

Tapu Koko @ Choice Scarf
Ability: Electric Surge
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Bolt Strike
- Brave Bird
- U-turn
- Play Rough

Ferrothorn @ Leftovers
Ability: Iron Barbs
EVs: 252 HP / 88 Def / 168 SpD
Impish Nature
- Spore
- Spikes
- Strength Sap
- Anchor Shot

Rotom-Wash @ Choice Scarf
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Trick
- Volt Switch
- Steam Eruption
- Blue Flare

Bewear @ Life Orb
Ability: Fluffy
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Swords Dance
- Milk Drink
- Extreme Speed
- Drain Punch