Latios-Mega (M) @ Latiosite  
Ability: Levitate  
EVs: 4 Atk / 252 SpA / 252 Spe  
Naive Nature  
- Ice Beam  
- Psychic  
- Earthquake  
- Recover  

Magearna @ Assault Vest  
Ability: Soul-Heart  
EVs: 252 HP / 220 SpD / 36 Spe  
Sassy Nature  
- Iron Head  
- Focus Blast  
- Volt Switch  
- Fleur Cannon  

Toxapex @ Black Sludge  
Ability: Regenerator  
EVs: 252 HP / 100 Def / 156 SpD  
Calm Nature  
IVs: 0 Atk  
- Scald  
- Recover  
- Toxic Spikes  
- Haze  

Mandibuzz (F) @ Heavy-Duty Boots  
Ability: Big Pecks  
EVs: 252 HP / 160 Def / 96 Spe  
Impish Nature  
- U-turn  
- Foul Play  
- Roost  
- Defog  

Terrakion @ Rockium Z  
Ability: Justified  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Swords Dance  
- Stealth Rock  
- Earthquake  
- Stone Edge  

Tangrowth @ Rocky Helmet  
Ability: Regenerator  
EVs: 252 HP / 252 Def / 4 SpD  
Relaxed Nature  
- Giga Drain  
- Knock Off  
- Hidden Power [Ice]  
- Sleep Powder