Xerneas @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Moonblast  
- Lava Plume  
- Lovely Kiss  
- Quiver Dance  

Doublade (M) @ Eviolite  
Ability: Mummy   
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Spectral Thief  
- Defog  
- Milk Drink  
- U-turn  

Groudon @ Red Orb  
Ability: Trace  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Eruption  
- Revelation Dance  
- Leech Seed  
- Tail Glow  

Celesteela @ Safety Goggles  
Ability: Primordial Sea  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Scald  
- U-turn  
- Recover  
- Defog  

Chansey @ Choice Scarf  
Ability: Imposter  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Trick  
- Whirlwind  
- U-turn  
- Recover  

Audino-Mega @ Safety Goggles  
Ability: Unaware  
Level: 99  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Entrainment  
- Poison Fang  
- Roost  
- U-turn