Diancie-Mega @ Choice Specs  
Ability: Pixilate  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Rash Nature  
- Boomburst  
- Earth Power  
- Extreme Speed  
- Volt Switch  

Second Impact (Tyranitar-Mega) @ Hard Stone  
Ability: Sand Stream  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Head Smash  
- Shift Gear  
- Spikes  
- Strength Sap  

Ho-Oh @ Assault Vest  
Ability: Regenerator  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Lava Plume  
- Spectral Thief  
- Anchor Shot  
- U-turn  

Arceus-Water @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Facade  
- Spectral Thief  
- Spiky Shield  
- Defog  

Zygarde-Complete @ Groundium Z  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Core Enforcer  
- Precipice Blades  
- Shore Up  
- U-turn  

Xerneas @ Safety Goggles  
Ability: Prankster  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Calm Nature  
IVs: 0 Atk  
- Moonblast  
- Will-O-Wisp  
- Shore Up  
- Haze