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

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

Arceus-Water @ Splash Plate  
Ability: Multitype  
EVs: 248 HP / 244 Def / 16 Spe  
Bold Nature  
IVs: 0 Atk  
- Will-O-Wisp  
- Ice Beam  
- Recover  
- Refresh  

Arceus-Steel @ Iron Plate  
Ability: Multitype  
EVs: 252 HP / 156 Def / 100 Spe  
Timid Nature  
IVs: 0 Atk  
- Flash Cannon  
- Recover  
- Calm Mind  
- Thunder  

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

Ferrothorn @ Leftovers  
Ability: Iron Barbs  
EVs: 252 HP / 4 Atk / 252 SpD  
Careful Nature  
- Leech Seed  
- Protect  
- Spikes  
- Power Whip