Ho-Oh @ Flyinium Z  
Ability: Regenerator  
EVs: 248 HP / 252 Atk / 8 SpD  
Adamant Nature  
- Sacred Fire  
- Brave Bird  
- Recover  
- Curse  

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

Cloyster @ Focus Sash  
Ability: Skill Link  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Icicle Spear  
- Shell Smash  
- Rapid Spin  
- Toxic Spikes  

Yveltal @ Metronome  
Ability: Dark Aura  
EVs: 4 Atk / 252 SpA / 252 Spe  
Naive Nature  
IVs: 0 Atk  
- Dark Pulse  
- Oblivion Wing  
- Taunt  
- Defog  

Magearna @ Leftovers  
Ability: Soul-Heart  
EVs: 252 HP / 4 SpA / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Heal Bell  
- Heart Swap  
- Volt Switch  
- Fleur Cannon  

Shaymin-Sky @ Life Orb  
Ability: Serene Grace  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Seed Flare  
- Air Slash  
- Hidden Power [Rock]  
- Healing Wish