Dialga @ Shed Shell  
Ability: Mold Breaker  
EVs: 248 HP / 4 Def / 4 SpA / 252 SpD  
Calm Nature  
- Roost  
- Doom Desire  
- Dragon Tail  
- Taunt  

Slaking @ Lum Berry  
Ability: Huge Power  
EVs: 252 Atk / 252 Def / 4 SpD  
Adamant Nature  
- Extreme Speed  
- Spikes  
- Gear Grind  
- Pursuit  

Rayquaza-Mega @ Sky Plate  
Ability: Gale Wings  
EVs: 248 HP / 252 SpA / 8 Spe  
Modest Nature  
IVs: 0 Atk  
- Chatter  
- Oblivion Wing  
- Toxic Spikes  
- Taunt  

Giratina @ Toxic Orb  
Ability: Poison Heal  
EVs: 248 HP / 8 Atk / 252 Def  
Impish Nature  
- Stealth Rock  
- Dragon Tail  
- Roost  
- King's Shield  

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

Xerneas @ Leftovers  
Ability: Magic Bounce  
EVs: 248 HP / 28 Def / 232 SpA  
Modest Nature  
IVs: 0 Atk  
- Moonblast  
- Spikes  
- Taunt  
- Roost