Groudon @ Heavy-Duty Boots  
Ability: Drought  
Tera Type: Water  
EVs: 240 HP / 252 Def / 16 Spe  
Impish Nature  
- Spikes  
- Precipice Blades  
- Thunder Wave  
- Roar  

Flutter Mane @ Choice Specs  
Ability: Protosynthesis  
Tera Type: Ghost  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Shadow Ball  
- Moonblast  
- Psyshock  
- Perish Song  

Koraidon @ Choice Scarf  
Ability: Orichalcum Pulse  
Tera Type: Fire  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Low Kick  
- Outrage  
- U-turn  
- Flare Blitz  

Necrozma-Dusk-Mane @ Heavy-Duty Boots  
Ability: Prism Armor  
Tera Type: Fire  
EVs: 252 HP / 204 Def / 52 Spe  
Impish Nature  
- Dragon Dance  
- Sunsteel Strike  
- Knock Off  
- Morning Sun  

Arceus-Fairy @ Pixie Plate  
Ability: Multitype  
Tera Type: Water  
EVs: 240 HP / 252 Def / 16 Spe  
Bold Nature  
- Judgment  
- Thunder Wave  
- Stealth Rock  
- Recover  

Eternatus @ Heavy-Duty Boots  
Ability: Pressure  
Tera Type: Fairy  
EVs: 200 HP / 252 SpD / 56 Spe  
Timid Nature  
- Dynamax Cannon  
- Toxic  
- Dragon Tail  
- Recover