Diancie-Mega @ Diancite  
Ability: Clear Body  
EVs: 4 Atk / 252 SpA / 252 Spe  
Mild Nature  
- Moonblast  
- Rock Polish  
- Earth Power  
- Diamond Storm  

Magnezone @ Choice Specs  
Ability: Magnet Pull  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 1 Atk  
- Hidden Power [Fire]  
- Thunderbolt  
- Volt Switch  
- Flash Cannon  

Tapu Lele @ Choice Scarf  
Ability: Psychic Surge  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Moonblast  
- Psyshock  
- Focus Blast  
- Hidden Power [Fire]  

Tyranitar @ Smooth Rock  
Ability: Sand Stream  
EVs: 252 HP / 252 Atk / 4 SpA  
Brave Nature  
- Stealth Rock  
- Ice Beam  
- Pursuit  
- Earthquake  

Mew @ Leftovers  
Ability: Synchronize  
EVs: 252 HP / 144 Def / 112 Spe  
Timid Nature  
- Ice Beam  
- Will-O-Wisp  
- Soft-Boiled  
- Defog  

Dugtrio @ Groundium Z  
Ability: Arena Trap  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Earthquake  
- Screech  
- Stone Edge  
- Substitute