Yveltal @ Life Orb  
Ability: Dark Aura  
EVs: 188 SpA / 68 SpD / 252 Spe  
Hasty Nature  
- Dark Pulse  
- Oblivion Wing  
- Sucker Punch  
- Roost  

Ho-Oh @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 248 HP / 20 Def / 224 SpD / 16 Spe  
Careful Nature  
- Sacred Fire  
- Thunder Wave / Mimic / Recover  
- Defog  
- Roar  

Groudon @ Leftovers  
Ability: Drought  
EVs: 240 HP / 108 Atk / 144 Def / 16 Spe  
Impish Nature  
- Toxic  
- Swords Dance  
- Precipice Blades  
- Stone Edge  

Eternatus @ Heavy-Duty Boots  
Ability: Pressure  
EVs: 164 HP / 252 SpD / 92 Spe  
Timid Nature  
IVs: 0 Atk  
- Dynamax Cannon  
- Mystical Fire  
- Toxic  
- Recover  

Xerneas @ Choice Band  
Ability: Fairy Aura  
EVs: 252 Atk / 72 Def / 184 Spe  
Adamant Nature  
- Play Rough  
- Close Combat  
- Rock Slide  
- Aromatherapy  

Necrozma-Dusk-Mane @ Leftovers  
Ability: Prism Armor  
EVs: 200 HP / 188 SpD / 120 Spe  
Careful Nature  
- Iron Head  
- Thunder Wave  
- Morning Sun  
- Stealth Rock