Diancie-Mega @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Quiver Dance  
- Spikes  
- Moonblast  
- Secret Sword  

Shedinja @ Protective Pads  
Ability: Sturdy  
EVs: 252 Atk / 204 Spe  
Lonely Nature  
- Swords Dance  
- Spectral Thief  
- Ice Shard  
- Endeavor  

Ho-Oh @ Firium Z  
Ability: Magic Bounce  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Anchor Shot  
- V-create  
- Recover  
- Defog  

Gengar-Mega @ Spooky Plate  
Ability: Regenerator  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Shell Smash  
- Baton Pass  
- Judgment  
- Rapid Spin  

Yveltal @ Assault Vest  
Ability: Regenerator  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Revelation Dance  
- Beak Blast  
- Knock Off  
- U-turn  

Giratina @ Safety Goggles  
Ability: Prankster  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD  
Bold Nature  
IVs: 0 Atk  
- Haze  
- Core Enforcer  
- Shore Up  
- Stealth Rock