Groudon @ Red Orb  
Ability: Electric Surge  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- V-create  
- Will-O-Wisp  
- Stealth Rock  
- Strength Sap  

Shedinja @ Protective Pads  
Ability: Sturdy  
EVs: 252 HP / 252 Atk  
Brave Nature  
IVs: 0 Def / 0 SpD / 0 Spe  
- Endeavor  
- U-turn  
- Extreme Speed  
- Stealth Rock  

Aerodactyl-Mega @ Sharp Beak  
Ability: Aerilate  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Rapid Spin  
- Strength Sap  
- Refresh  
- Return  

Blissey (F) @ Choice Scarf  
Ability: Imposter  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Whirlwind  
- Will-O-Wisp  
- Trick  
- Dragon Tail  

Arceus-Ground @ Expert Belt  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
- Spectral Thief  
- Roost  
- Revelation Dance  
- Thunder  

Xerneas @ Fairium Z  
Ability: Prankster  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Calm Nature  
IVs: 0 Atk  
- Moonblast  
- Spikes  
- Recover  
- Taunt