Diancie-Mega @ Diancite  
Ability: Magic Bounce  
EVs: 152 HP / 252 SpA / 104 Spe  
Mild Nature  
- Stealth Rock  
- Protect  
- Diamond Storm  
- Moonblast  

Arceus-Ground @ Earth Plate  
Ability: Multitype  
EVs: 248 HP / 240 Def / 20 Spe  
Bold Nature  
IVs: 0 Atk  
- Defog  
- Recover  
- Judgment  
- Ice Beam  

Ditto @ Choice Scarf  
Ability: Imposter  
EVs: 252 HP / 4 Atk / 252 Def  
Relaxed Nature  
IVs: 30 Def / 30 SpD / 0 Spe  
- Transform  

Ho-Oh @ Choice Band  
Ability: Regenerator  
EVs: 248 HP / 188 Atk / 52 SpD / 20 Spe  
Adamant Nature  
- Brave Bird  
- Sacred Fire  
- Earthquake  
- Sleep Talk  

Mewtwo @ Leftovers  
Ability: Unnerve  
EVs: 248 HP / 8 Def / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Taunt  
- Will-O-Wisp  
- Recover  
- Psystrike  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 248 HP / 16 Atk / 120 Def / 120 SpD / 4 Spe  
Brave Nature  
- Rest  
- Stone Edge  
- Lava Plume  
- Precipice Blades