Rayquaza-Mega @ Choice Scarf  
Ability: Delta Stream  
Tera Type: Flying  
EVs: 252 Atk / 4 SpA / 252 Spe  
Hasty Nature  
- Overheat  
- Waterfall  
- Dragon Ascent  
- Earthquake  

Arceus-Dark @ Dread Plate  
Ability: Multitype  
Tera Type: Fairy  
EVs: 252 HP / 252 Def / 4 SpD  
Impish Nature  
IVs: 0 Atk  
- Foul Play  
- Thunder Wave  
- Recover  
- Roar  

Groudon-Primal @ Leftovers  
Ability: Desolate Land  
Tera Type: Water  
EVs: 252 HP / 92 Def / 164 SpD  
Impish Nature  
- Spikes  
- Precipice Blades  
- Thunder Wave  
- Roar  

Kyogre-Primal @ Choice Specs  
Ability: Primordial Sea  
Tera Type: Ghost  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Water Spout  
- Origin Pulse  
- Thunder  
- Ice Beam  

Arceus-Steel @ Iron Plate  
Ability: Multitype  
Tera Type: Ground  
EVs: 252 HP / 160 Def / 72 SpD / 24 Spe  
Bold Nature  
IVs: 0 Atk  
- Judgment  
- Calm Mind  
- Earth Power  
- Recover  

Diancie-Mega @ Air Balloon  
Ability: Magic Bounce  
Tera Type: Flying  
EVs: 252 HP / 128 Def / 128 SpD  
Bold Nature  
IVs: 0 Atk  
- Encore  
- Power Gem  
- Moonblast  
- Stealth Rock