Gyarados-Mega @ Lum Berry  
Ability: Huge Power  
EVs: 248 HP / 252 Atk / 8 SpD  
Adamant Nature  
- Pursuit  
- Beat Up  
- Water Shuriken  
- Ice Shard  

Slaking @ Life Orb  
Ability: Shadow Tag  
EVs: 248 HP / 252 Atk / 8 SpD  
Adamant Nature  
- Fake Out  
- Extreme Speed  
- Low Kick  
- Encore  

Groudon-Primal @ Choice Band  
Ability: Mold Breaker  
EVs: 240 HP / 252 Atk / 16 Spe  
Adamant Nature  
- U-turn  
- Precipice Blades  
- V-create  
- Trick  

Rayquaza-Mega @ Sky Plate  
Ability: Mold Breaker  
EVs: 208 HP / 252 SpA / 48 Spe  
Modest Nature  
IVs: 0 Atk  
- Taunt  
- Quiver Dance  
- Oblivion Wing  
- Substitute  

Xerneas @ Leftovers  
Ability: Wonder Guard  
EVs: 128 HP / 252 SpA / 28 SpD / 100 Spe  
Modest Nature  
IVs: 0 Atk  
- Moonblast  
- Taunt  
- Substitute  
- Baton Pass  

Ferrothorn @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 168 Def / 92 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Recover  
- Defog  
- Whirlwind  
- Baton Pass