Giratina-Origin @ Leftovers  
Ability: Levitate  
Tera Type: Steel  
EVs: 248 HP / 104 Atk / 112 Def / 44 Spe  
Adamant Nature  
- Poltergeist  
- Dragon Tail  
- Earthquake  
- Defog  

Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
Tera Type: Water  
EVs: 252 HP / 236 Def / 20 Spe  
Impish Nature  
- Brave Bird  
- Sacred Fire  
- Earthquake  
- Whirlwind  

Mewtwo-Mega-Y @ Choice Specs  
Ability: Insomnia  
Tera Type: Ghost  
EVs: 28 Def / 252 SpA / 228 Spe  
Modest Nature  
IVs: 0 Atk  
- Psystrike  
- Earth Power  
- Aura Sphere  
- Shadow Ball  

Rayquaza-Mega @ Choice Scarf  
Ability: Delta Stream  
Tera Type: Flying  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Dragon Ascent  
- Earthquake  
- Extreme Speed  
- U-turn  

Groudon-Primal @ Leftovers  
Ability: Desolate Land  
Tera Type: Flying  
EVs: 252 HP / 4 Def / 236 SpD / 16 Spe  
Careful Nature  
- Precipice Blades  
- Stone Edge  
- Thunder Wave  
- Stealth Rock  

Arceus-Fairy @ Dread Plate  
Ability: Multitype  
Tera Type: Steel  
EVs: 252 HP / 40 Def / 216 Spe  
Timid Nature  
IVs: 0 Atk  
- Foul Play  
- Will-O-Wisp  
- Recover  
- Taunt