Latios (M) @ Choice Scarf  
Ability: Levitate  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk / 30 SpA / 30 Spe  
- Ice Beam  
- Draco Meteor  
- Hidden Power [Fire]  
- Psyshock  

Diancie-Mega @ Diancite  
Ability: Clear Body  
EVs: 248 HP / 8 Atk / 252 Spe  
Hasty Nature  
- Diamond Storm  
- Moonblast  
- Protect  
- Stealth Rock  

Talonflame @ Choice Band  
Ability: Gale Wings  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Brave Bird  
- Flare Blitz  
- Steel Wing  
- U-turn  

Keldeo-Resolute @ Life Orb  
Ability: Justified  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Hydro Pump  
- Quick Guard  
- Secret Sword  
- Protect  

Thundurus (M) @ Sitrus Berry  
Ability: Prankster  
EVs: 248 HP / 164 Def / 4 SpA / 72 SpD / 20 Spe  
Modest Nature  
- Thunder Wave  
- Thunderbolt  
- Hidden Power [Ice]  
- Sky Drop  

Amoonguss @ Rocky Helmet  
Ability: Regenerator  
EVs: 252 HP / 172 Def / 84 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Rage Powder  
- Spore  
- Giga Drain  
- Protect