Swampert-Mega @ Swampertite  
Ability: Swift Swim  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Waterfall  
- Superpower  
- Earthquake  
- Rain Dance  

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

Haha fish go rend (Dracovish) @ Choice Band  
Ability: Strong Jaw  
EVs: 4 HP / 252 Atk / 252 Spe  
Adamant Nature  
- Fishious Rend  
- Outrage  
- Psychic Fangs  
- Crunch  

Magearna @ Assault Vest  
Ability: Soul-Heart  
EVs: 200 HP / 56 SpA / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Volt Switch  
- Fleur Cannon  
- Aura Sphere  
- Ice Beam  

Kartana @ Normalium Z  
Ability: Beast Boost  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Swords Dance  
- Leaf Blade  
- Giga Impact  
- Knock Off  

Thundurus-Therian (M) @ Choice Scarf  
Ability: Volt Absorb  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Volt Switch  
- Thunder  
- Hidden Power [Ice]  
- Grass Knot