Rayquaza-Mega @ Choice Band  
Ability: Delta Stream  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Dragon Ascent  
- V-create  
- Extreme Speed  
- Earthquake  

Kyogre-Primal @ Blue Orb  
Ability: Primordial Sea  
EVs: 72 Def / 184 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Calm Mind  
- Block  
- Origin Pulse  
- Ice Beam  

Necrozma-Dusk-Mane @ Weakness Policy  
Ability: Prism Armor  
EVs: 132 HP / 252 Atk / 124 Spe  
Adamant Nature  
- Sunsteel Strike  
- Autotomize  
- Stone Edge  
- Earthquake  

Marshadow @ Marshadium Z  
Ability: Technician  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Spectral Thief  
- Bulk Up  
- Shadow Sneak  
- Close Combat  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 252 SpA / 104 SpD / 152 Spe  
Mild Nature  
- Stealth Rock  
- Precipice Blades  
- Overheat  
- Toxic  

Arceus-unknown  
Ability: Multitype