Groudon @ Heat Rock  
Ability: Drought  
EVs: 252 HP / 56 Def / 200 SpD  
Relaxed Nature  
- Stealth Rock  
- Precipice Blades  
- Overheat  
- Toxic  

Shaymin-Sky @ Life Orb  
Ability: Serene Grace  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Growth  
- Seed Flare  
- Air Slash  
- Earth Power  

Diancie @ Diancite  
Ability: Clear Body  
EVs: 24 Atk / 232 SpA / 252 Spe  
Naive Nature  
- Moonblast  
- Diamond Storm  
- Earth Power  
- Heal Bell  

Cresselia (F) @ Eject Button  
Ability: Levitate  
EVs: 252 HP / 4 SpA / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Moonlight  
- Ice Beam  
- Lunar Dance  
- Thunder Wave  

Arceus-Fire @ Firium Z  
Ability: Multitype  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Calm Mind  
- Fire Blast  
- Recover  
- Earth Power  

Giratina @ Leftovers  
Ability: Pressure  
EVs: 252 HP / 252 Def / 4 SpD  
Relaxed Nature  
- Dragon Tail  
- Rest  
- Toxic  
- Hex