Mewtwo-Mega-Y @ Mewtwonite Y  
Ability: Insomnia  
EVs: 24 HP / 28 Def / 240 SpA / 216 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Psystrike  
- Focus Blast  
- Ice Beam  

Eternatus @ Life Orb  
Ability: Pressure  
Tera Type: Dragon  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Sludge Bomb  
- Fire Blast  
- Recover  

Groudon-Primal @ Red Orb  
Ability: Drought  
EVs: 248 HP / 68 Def / 188 SpD / 4 Spe  
Impish Nature  
- Stealth Rock  
- Swords Dance  
- Precipice Blades  
- Rock Tomb  

Yveltal @ Choice Scarf  
Ability: Dark Aura  
EVs: 72 HP / 212 Def / 224 Spe  
Jolly Nature  
- Foul Play  
- Sucker Punch  
- Defog  
- U-turn  

Giratina-Origin @ Griseous Core  
Ability: Levitate  
Tera Type: Steel  
EVs: 248 HP / 80 Def / 68 SpA / 112 SpD  
Bold Nature  
IVs: 0 Atk  
- Draco Meteor  
- Hex  
- Defog  
- Toxic  

Arceus-Fairy @ Pixie Plate  
Ability: Multitype  
Tera Type: Water  
EVs: 248 HP / 164 Def / 96 Spe  
Timid Nature  
IVs: 0 Atk  
- Judgment  
- Will-O-Wisp  
- Recover  
- Roar