Groudon-Primal @ Red Orb  
Ability: Drought  
EVs: 4 Atk / 252 SpA / 252 Spe  
Hasty Nature  
- Eruption  
- Precipice Blades  
- Rock Tomb  
- Swords Dance  

Arceus-Ground @ Earth Plate  
Ability: Multitype  
Tera Type: Fairy  
EVs: 248 HP / 180 Def / 64 SpD / 16 Spe  
Bold Nature  
IVs: 0 Atk  
- Judgment  
- Power Gem  
- Recover  
- Will-O-Wisp  

Yveltal @ Choice Scarf  
Ability: Dark Aura  
Tera Type: Dark  
EVs: 32 HP / 252 Def / 224 Spe  
Jolly Nature  
- Foul Play  
- U-turn  
- Defog  
- Sucker Punch  

Diancie-Mega @ Diancite  
Ability: Magic Bounce  
EVs: 36 HP / 32 Atk / 220 SpA / 4 SpD / 216 Spe  
Hasty Nature  
- Diamond Storm  
- Moonblast  
- Earth Power  
- Stealth Rock  

Ferrothorn @ Leftovers  
Ability: Iron Barbs  
Tera Type: Water  
EVs: 248 HP / 60 Def / 200 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Power Whip  
- Spikes  
- Leech Seed  
- Gyro Ball  

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