Rayquaza-Mega @ Life Orb  
Ability: Delta Stream  
EVs: 252 Atk / 4 Def / 252 Spe  
Adamant Nature  
- Dragon Ascent  
- Dragon Dance  
- Extreme Speed  
- Earthquake  

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

Ho-Oh @ Leftovers  
Ability: Regenerator  
EVs: 252 HP / 204 Def / 52 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Sacred Fire  
- Toxic  
- Defog  
- Whirlwind  

Arceus-Water @ Splash Plate  
Ability: Multitype  
EVs: 252 HP / 240 Def / 16 Spe  
Bold Nature  
IVs: 0 Atk  
- Recover  
- Toxic  
- Ice Beam  
- Defog  

Kyogre-Primal @ Blue Orb  
Ability: Primordial Sea  
EVs: 4 Def / 252 SpA / 252 Spe  
Modest Nature  
- Origin Pulse  
- Ice Beam  
- Calm Mind  
- Water Spout  

Yveltal @ Choice Scarf  
Ability: Dark Aura  
EVs: 176 SpA / 80 SpD / 252 Spe  
Modest Nature  
- Dark Pulse  
- Oblivion Wing  
- U-turn  
- Foul Play