Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 248 HP / 188 Def / 72 SpD  
Impish Nature  
- Sunsteel Strike  
- Morning Sun  
- Toxic  
- Stealth Rock  

Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 248 HP / 200 Def / 60 SpD  
Impish Nature  
- Sacred Fire  
- Defog  
- Toxic  
- Whirlwind  

Tyranitar @ Leftovers  
Ability: Sand Stream  
EVs: 252 HP / 4 Def / 252 SpD  
Careful Nature  
- Rock Tomb  
- Pursuit  
- Foul Play  
- Rest  

Arceus-Ground @ Earth Plate  
Ability: Multitype  
EVs: 252 HP / 244 Def / 12 Spe  
Bold Nature  
IVs: 0 Atk  
- Judgment  
- Recover  
- Ice Beam  
- Refresh  

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

Ferrothorn @ Leftovers  
Ability: Iron Barbs  
EVs: 252 HP / 4 Def / 252 SpD  
Careful Nature  
IVs: 0 SpA  
- Leech Seed  
- Protect  
- Knock Off  
- Spikes