Imabroom (Mewtwo-Mega-Y) @ Mewtwonite Y  
Ability: Insomnia  
EVs: 80 Def / 252 SpA / 176 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Psystrike  
- Ice Beam  
- Fire Blast  

Necrozma-Dusk-Mane @ Rocky Helmet  
Ability: Prism Armor  
EVs: 252 HP / 4 Atk / 252 Def  
Impish Nature  
- Sunsteel Strike  
- Knock Off  
- Stealth Rock  
- Morning Sun  

Ditto @ Choice Scarf  
Ability: Imposter  
EVs: 248 HP / 8 Atk / 252 Def  
Impish Nature  
IVs: 30 Atk  
- Transform  

Zygarde @ Safety Goggles  
Ability: Power Construct  
EVs: 252 HP / 4 Atk / 252 Def  
Impish Nature  
- Haze  
- Glare  
- Rest  
- Thousand Arrows  

Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 248 HP / 204 Def / 56 SpD  
Impish Nature  
- Toxic  
- Sacred Fire  
- Whirlwind  
- Defog  

Chansey (F) @ Eviolite  
Ability: Natural Cure  
EVs: 4 HP / 252 Def / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Heal Bell  
- Soft-Boiled  
- Confide  
- Toxic