Mewtwo-Mega-Y @ Mewtwonite Y  
Ability: Insomnia  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Fire Blast  
- Focus Blast  
- Psystrike  

Necrozma-Dusk-Mane @ Heavy-Duty Boots  
Ability: Prism Armor  
EVs: 252 HP / 188 Def / 32 SpD / 36 Spe  
Impish Nature  
- Sunsteel Strike  
- Stealth Rock  
- Thunder Wave  
- Morning Sun  

Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 248 HP / 208 Def / 52 SpD  
Impish Nature  
- Sacred Fire  
- Toxic  
- Defog  
- Whirlwind  

Eternatus @ Life Orb  
Ability: Pressure  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Flamethrower  
- Sludge Bomb  
- Recover  

Zygarde @ Leftovers  
Ability: Power Construct  
EVs: 16 HP / 224 Atk / 36 Def / 232 Spe  
Impish Nature  
- Dragon Dance  
- Thousand Arrows  
- Substitute  
- Dragon Tail  

Arceus-Ghost @ Ghostium Z  
Ability: Multitype  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Swords Dance  
- Shadow Force  
- Extreme Speed  
- Recover