Ho-Oh @ Leftovers  
Ability: Regenerator  
EVs: 252 HP / 204 Def / 52 SpD  
Impish Nature  
- Sacred Fire  
- Brave Bird  
- Toxic  
- Recover  

Groudon-Primal @ Red Orb  
Ability: Drought  
EVs: 190 HP / 118 Atk / 200 SpD  
Careful Nature  
- Stealth Rock  
- Fire Punch  
- Earthquake  
- Stone Edge  

Lucario-Mega @ Lucarionite  
Ability: Steadfast  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Swords Dance  
- Close Combat  
- Iron Tail  
- Bullet Punch  

Arceus-Water @ Splash Plate  
Ability: Multitype  
EVs: 252 HP / 64 Def / 192 Spe  
Timid Nature  
IVs: 0 Atk  
- Toxic  
- Defog  
- Judgment  
- Recover  

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

Xerneas @ Choice Scarf  
Ability: Fairy Aura  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Moonblast  
- Thunder  
- Hidden Power [Ground]  
- Focus Blast