Aerodactyl-Mega @ Life Orb  
Ability: Shadow Tag  
EVs: 40 HP / 252 Atk / 216 Spe  
Jolly Nature  
- Dragon Ascent  
- Diamond Storm  
- Gunk Shot  
- Stealth Rock  

Arceus @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 44 Def / 216 Spe  
Jolly Nature  
- Parting Shot  
- Recover  
- Defog  
- Nuzzle  

Aegislash @ Safety Goggles  
Ability: Prankster  
EVs: 248 HP / 8 Def / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Encore  
- Curse  
- Roost  
- Spore  

Gyarados-Mega @ Safety Goggles  
Ability: Prankster  
EVs: 248 HP / 252 Def / 8 SpD  
Impish Nature  
- Heal Order  
- Pursuit  
- Spore  
- Parting Shot  

Xerneas @ Leftovers  
Ability: Magic Bounce  
EVs: 248 HP / 140 Def / 120 Spe  
Bold Nature  
IVs: 0 Atk  
- Quiver Dance  
- Moonblast  
- Baton Pass  
- Freeze-Dry  

Mewtwo-Mega-X @ Shed Shell  
Ability: Wonder Guard  
EVs: 120 HP / 252 Atk / 4 Def / 132 Spe  
Naive Nature  
- Sacred Fire  
- Knock Off  
- Shell Smash  
- Freeze-Dry