Groudon-Primal @ Soft Sand  
Ability: Mold Breaker  
EVs: 92 HP / 200 Atk / 144 Def / 72 Spe  
Adamant Nature  
- Shell Smash  
- Thousand Arrows  
- King's Shield  
- Spore  

Mewtwo-Mega-X @ Choice Scarf  
Ability: Shadow Tag  
EVs: 12 HP / 80 Atk / 252 Def / 164 Spe  
Lax Nature  
- Low Kick  
- Steam Eruption  
- Dragon Ascent  
- Trick  

Slaking @ Silk Scarf  
Ability: Shadow Tag  
EVs: 4 HP / 252 Atk / 252 Def  
Adamant Nature  
- Fake Out  
- Stealth Rock  
- Extreme Speed  
- Low Kick  

Giratina @ Safety Goggles  
Ability: Prankster  
EVs: 248 HP / 8 Def / 252 SpD  
Calm Nature  
- Curse  
- Recover  
- Encore  
- Spore  

Xerneas @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 108 Def / 152 SpA  
Modest Nature  
- Defog  
- Aromatherapy  
- Moonblast  
- Recover  

Beedrill-Mega @ Black Sludge  
Ability: Wonder Guard  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- U-turn  
- Gunk Shot  
- Toxic Spikes  
- Taunt