Ditto @ Choice Scarf  
Ability: Imposter  
EVs: 252 HP / 4 Atk / 252 Def  
Relaxed Nature  
IVs: 0 Spe  
- Transform  

Jirachi @ Choice Scarf  
Ability: Serene Grace  
EVs: 252 HP / 4 SpD / 252 Spe  
Jolly Nature  
- Wish  
- Toxic  
- U-turn  
- Iron Head  

Arceus-Dark @ Dread Plate  
Ability: Multitype  
EVs: 252 HP / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Refresh  
- Calm Mind  
- Recover  
- Judgment  

Latias-Mega (F) @ Latiasite  
Ability: Levitate  
EVs: 252 HP / 76 Def / 180 Spe  
Timid Nature  
IVs: 0 Atk  
- Toxic  
- Roost  
- Refresh  
- Dragon Pulse  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 252 HP / 56 Def / 188 SpD / 12 Spe  
Relaxed Nature  
- Toxic  
- Stealth Rock  
- Overheat  
- Earthquake  

Xerneas @ Grassium Z  
Ability: Fairy Aura  
EVs: 252 HP / 252 Def / 4 Spe  
Bold Nature  
IVs: 0 Atk  
- Defog  
- Thunder Wave  
- Aromatherapy  
- Moonblast