Ho-Oh @ Choice Band  
Ability: Regenerator  
Tera Type: Flying  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Brave Bird  
- Sacred Fire  
- Earthquake  
- Defog  

Diancie-Mega @ Diancite  
Ability: Magic Bounce  
Tera Type: Rock  
EVs: 28 Atk / 232 SpA / 32 SpD / 216 Spe  
Hasty Nature  
- Diamond Storm  
- Moonblast  
- Earth Power  
- Stealth Rock  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
Tera Type: Ground  
EVs: 248 HP / 140 Def / 120 SpD  
Impish Nature  
- Precipice Blades  
- Dragon Tail  
- Toxic  
- Overheat  

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

Arceus-Dark @ Dread Plate  
Ability: Multitype  
Tera Type: Poison  
EVs: 248 HP / 4 Def / 160 SpD / 96 Spe  
Timid Nature  
IVs: 0 Atk  
- Judgment  
- Calm Mind  
- Recover  
- Taunt  

Ditto @ Choice Scarf  
Ability: Imposter  
Tera Type: Ghost  
EVs: 248 HP / 8 Atk / 252 Def  
Relaxed Nature  
IVs: 0 Spe  
- Transform