Dialga @ Assault Vest  
Ability: Pressure  
Tera Type: Grass  
EVs: 252 HP / 252 SpD / 4 Spe  
Careful Nature  
- Dragon Tail  
- Flash Cannon  
- Earthquake  
- Rock Slide  

Eternatus  
Ability: Pressure  
Tera Type: Fairy  
EVs: 252 HP / 40 SpD / 216 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Toxic  
- Toxic Spikes  
- Recover  

Alomomola @ Heavy-Duty Boots  
Ability: Regenerator  
Tera Type: Poison  
EVs: 4 Atk / 252 Def / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Wish  
- Protect  
- Flip Turn  
- Toxic  

Groudon @ Red Orb  
Ability: Drought  
Tera Type: Ground  
EVs: 212 SpA / 144 SpD / 152 Spe  
Mild Nature  
- Spikes  
- Precipice Blades  
- Hidden Power [Ice]  
- Eruption  

Marshadow @ Choice Band  
Ability: Technician  
Tera Type: Ghost  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Shadow Sneak  
- Poltergeist  
- Spectral Thief  
- Low Kick  

Arceus-Dark @ Dread Plate  
Ability: Multitype  
Tera Type: Poison  
EVs: 248 HP / 136 Def / 124 Spe  
Bold Nature  
IVs: 0 Atk  
- Foul Play  
- Stealth Rock  
- Taunt  
- Recover