Groudon @ Soft Sand  
Ability: Soundproof  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Precipice Blades  
- Poison Fang  
- Roost  
- Stealth Rock  

Celesteela @ Rocky Helmet  
Ability: Triage  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Nasty Plot  
- Oblivion Wing  
- Leech Seed  
- Thunder Cage  

Zekrom @ Life Orb  
Ability: Adaptability  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naive Nature  
- Bolt Strike  
- Clanging Scales  
- Spikes  
- Strength Sap