Deoxys-Speed @ Choice Scarf  
Ability: No Guard  
EVs: 248 HP / 8 Def / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Sheer Cold  
- Zap Cannon  
- Gastro Acid  
- Stealth Rock  

Rayquaza (Rayquaza-Mega) @ Sky Plate  
Ability: Aerilate  
Shiny: Yes  
EVs: 248 HP / 252 Atk / 8 Spe  
Brave Nature  
- Fake Out  
- Extreme Speed  
- Boomburst  
- Gastro Acid  

Giratina @ Griseous Orb  
Ability: Prankster  
EVs: 248 HP / 252 Def / 8 SpD  
Bold Nature  
IVs: 0 Atk  
- Destiny Bond  
- Encore  
- Curse  
- Recover  

Arceus-Electric @ Shed Shell  
Ability: Wonder Guard  
Shiny: Yes  
EVs: 248 HP / 244 Def / 16 Spe  
Bold Nature  
IVs: 0 Atk  
- Gastro Acid  
- Defog  
- Parting Shot  
- Recover  

Groudon-Primal @ Choice Band  
Ability: Mold Breaker  
Shiny: Yes  
EVs: 248 HP / 252 Atk / 8 Def  
Adamant Nature  
- V-create  
- Thousand Waves  
- Precipice Blades  
- U-turn  

Swampert (Swampert-Mega) @ Leftovers  
Ability: Wonder Guard  
Shiny: Yes  
EVs: 248 HP / 252 Atk / 8 Def  
Brave Nature  
IVs: 0 Spe  
- Recover  
- Substitute  
- Crabhammer  
- Baton Pass