Swampert-Mega @ Swampertite  
Ability: Swift Swim  
Tera Type: Water  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Earthquake  
- Flip Turn  
- Ice Punch  
- Stone Edge  

Pelipper @ Damp Rock  
Ability: Drizzle  
Tera Type: Water  
EVs: 248 HP / 252 Def / 8 SpD  
Bold Nature  
- U-turn  
- Roost  
- Defog  
- Scald  

Ogerpon-Wellspring (F) @ Wellspring Mask  
Ability: Water Absorb  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Ivy Cudgel  
- Power Whip  
- U-turn  
- Knock Off  

Basculegion (M) @ Life Orb  
Ability: Swift Swim  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Aqua Jet  
- Flip Turn  
- Wave Crash  
- Phantom Force  

Ferrothorn @ Rocky Helmet  
Ability: Iron Barbs  
EVs: 248 HP / 8 Atk / 252 Def  
Relaxed Nature  
IVs: 0 Spe  
- Leech Seed  
- Body Press  
- Gyro Ball  
- Stealth Rock  

Tornadus-Therian (M) @ Heavy-Duty Boots  
Ability: Regenerator  
Tera Type: Flying  
EVs: 184 HP / 108 Def / 216 Spe  
Timid Nature  
- Bleakwind Storm  
- U-turn  
- Knock Off  
- Heat Wave