Endless Night (Rayquaza-Mega) @ Shed Shell  
Ability: Mold Breaker  
EVs: 64 HP / 252 SpA / 192 Spe  
Modest Nature  
IVs: 0 Atk  
- Substitute  
- Shell Smash  
- Oblivion Wing  
- Dark Void  

Cat and Mouse (Groudon-Primal) @ Choice Scarf  
Ability: Shadow Tag  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Trick  
- Stealth Rock  
- Thousand Arrows  
- V-create  

Dead Mans Hollow (Giratina) @ Leftovers  
Ability: Magic Bounce  
EVs: 248 HP / 252 Def / 8 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Substitute  
- Baton Pass  
- Recover  
- Curse  

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

Exhaust Reason (Beedrill-Mega) @ Black Sludge  
Ability: Wonder Guard  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Trick  
- Spikes  
- U-turn  
- Taunt  

Maze of Fire (Chansey) (F) @ Eviolite  
Ability: Imposter  
EVs: 248 HP / 252 Def / 8 SpD  
Relaxed Nature  
IVs: 0 Atk / 30 SpA / 0 Spe  
- Whirlwind  
- Chatter  
- Spikes  
- Wish