Groudon @ Lum Berry  
Ability: Drought  
EVs: 88 HP / 252 Atk / 4 SpD / 164 Spe  
Adamant Nature  
- Swords Dance  
- Precipice Blades  
- Stone Edge  
- Rock Polish  

Arceus-Dark @ Dread Plate  
Ability: Multitype  
EVs: 252 HP / 4 Def / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Calm Mind  
- Judgment  
- Recover  
- Roar  

Mewtwo @ Choice Scarf  
Ability: Pressure  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Psystrike  
- Fire Blast  
- Shadow Ball  
- Focus Blast  

Toxapex @ Black Sludge  
Ability: Regenerator  
EVs: 252 HP / 144 Def / 112 SpD  
Calm Nature  
IVs: 0 Atk  
- Toxic Spikes  
- Recover  
- Scald  
- Baneful Bunker  

Shaymin-Sky @ Leftovers  
Ability: Serene Grace  
EVs: 220 HP / 36 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Leech Seed  
- Air Slash  
- Seed Flare  
- Substitute  

Pheromosa @ Groundium Z  
Ability: Beast Boost  
EVs: 252 Atk / 4 SpA / 252 Spe  
Naive Nature  
- U-turn  
- Ice Beam  
- Low Kick  
- Drill Run