Mewtwo-Mega-Y @ Mewtwonite Y  
Ability: Insomnia  
EVs: 40 Def / 216 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Calm Mind  
- Psystrike  
- Ice Beam  
- Fire Blast  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 252 HP / 52 SpA / 204 SpD  
Quiet Nature  
- Stealth Rock  
- Precipice Blades  
- Overheat  
- Toxic / Roar

Giratina-Origin @ Griseous Orb  
Ability: Levitate  
EVs: 252 HP / 204 SpA / 52 SpD  
Modest Nature  
IVs: 0 Atk  
- Will-O-Wisp  
- Hex  
- Draco Meteor  
- Defog  

Arceus-Dark @ Dread Plate  
Ability: Multitype  
EVs: 252 HP / 160 Def / 96 Spe  
Timid Nature  
IVs: 0 Atk  
- Judgment  
- Ice Beam  
- Toxic / Thunder
- Recover  

Toxapex @ Rocky Helmet  
Ability: Regenerator  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Toxic  
- Toxic Spikes  
- Recover  
- Haze  

Necrozma-Dusk-Mane @ Ultranecrozium Z  
Ability: Prism Armor  
EVs: 216 Atk / 32 Def / 8 SpD / 252 Spe  
Jolly Nature  
- Swords Dance  
- Photon Geyser  
- Earthquake  
- Outrage  / Sunsteel Strike