Rayquaza-Mega @ Choice Scarf  
Ability: Delta Stream  
EVs: 252 Atk / 4 SpA / 252 Spe  
Naughty Nature  
- Dragon Ascent  
- V-create  
- Draco Meteor  
- Extreme Speed  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 248 HP / 8 Def / 252 SpD  
Sassy Nature  
- Lava Plume  
- Precipice Blades  
- Rest  
- Stealth Rock  

Kyogre-Primal @ Blue Orb  
Ability: Primordial Sea  
EVs: 136 HP / 140 SpA / 232 Spe  
Modest Nature  
IVs: 0 Atk  
- Water Spout  
- Origin Pulse  
- Thunder  
- Ice Beam  

Arceus @ Safety Goggles  
Ability: Multitype  
EVs: 240 HP / 252 Atk / 16 Spe  
Adamant Nature  
- Extreme Speed  
- Shadow Claw  
- Swords Dance  
- Roar  

Xerneas @ Leftovers  
Ability: Fairy Aura  
EVs: 248 HP / 252 Def / 8 SpD  
Bold Nature  
IVs: 0 Atk  
- Moonblast  
- Toxic  
- Aromatherapy  
- Defog  

Necrozma-Dusk-Mane @ Ultranecrozium Z  
Ability: Prism Armor  
EVs: 176 HP / 80 Atk / 252 Spe  
Jolly Nature  
- Photon Geyser  
- Sunsteel Strike  
- Earthquake  
- Swords Dance