Xerneas @ Leftovers / Shed Shell  
Ability: Fairy Aura  
EVs: 248 HP / 252 Def / 8 SpD  
Bold Nature  
IVs: 0 Atk  
- Moonblast  
- Aromatherapy  
- Rest  
- Sleep Talk / Thunder Wave  

Gengar-Mega @ Gengarite  
Ability: Shadow Tag  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Substitute  
- Hex  
- Sludge Bomb  
- Thunder  

Zygarde-Complete @ Leftovers  
Ability: Power Construct  
EVs: 252 HP / 252 Def / 4 SpD  
Impish Nature  
- Rest  
- Thousand Arrows  
- Glare  
- Coil  

Ho-Oh @ Flyinium Z / Life Orb 
Ability: Regenerator  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Brave Bird  
- Sacred Fire  
- Toxic  
- Defog  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 252 HP / 252 SpD / 4 Spe  
Careful Nature  
- Stealth Rock  
- Precipice Blades  
- Toxic  
- Roar  

Arceus-Dark @ Dread Plate  
Ability: Multitype  
EVs: 252 HP / 160 Def / 96 Spe  
Timid Nature  
IVs: 0 Atk  
- Judgment  
- Toxic  
- Recover  
- Defog