Groudon @ Choice Band  
Ability: Mold Breaker  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Precipice Blades  
- Thousand Arrows  
- Glacial Lance  
- U-turn  

Eternatus @ Black Sludge  
Ability: Simple  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Nasty Plot  
- Core Enforcer  
- Earth Power  
- Sludge Bomb  

Ho-Oh @ Heavy-Duty Boots  
Ability: Ice Scales  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Defog  
- V-create  
- Spectral Thief  
- Roost  

Giratina @ Leftovers  
Ability: Fur Coat  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Bold Nature  
IVs: 0 Atk  
- Core Enforcer  
- Scald  
- Shore Up  
- Aromatherapy  

Golisopod @ Leftovers  
Ability: Prankster  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
IVs: 0 Atk  
- Glare  
- Haze  
- Recover  
- Parting Shot  

Xerneas @ Metronome  
Ability: Pixilate  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
- Boomburst  
- Rapid Spin  
- Worry Seed  
- Shore Up