Metagross-Mega @ Shed Shell  
Ability: No Guard  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Dark Void  
- Sheer Cold  
- Gastro Acid  
- Gear Grind  

Rayquaza-Mega @ Life Orb  
Ability: Mold Breaker  
EVs: 32 HP / 116 Def / 252 SpA / 108 Spe  
Modest Nature  
IVs: 0 Atk  
- Quiver Dance  
- Oblivion Wing  
- Taunt  
- King's Shield  

Slaking @ Silk Scarf  
Ability: Shadow Tag  
EVs: 252 Atk / 216 Def / 40 Spe  
Adamant Nature  
- Fake Out  
- Extreme Speed  
- Low Kick  
- Spikes  

Swampert-Mega @ Leftovers  
Ability: Wonder Guard  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Thousand Arrows  
- Shell Smash  
- Baton Pass  
- Gastro Acid  

Arceus @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 244 Def / 16 Spe  
Bold Nature  
IVs: 0 Atk  
- Stealth Rock  
- Defog  
- Boomburst  
- Recover  

Rayquaza-Mega @ Choice Specs  
Ability: Gale Wings  
EVs: 248 HP / 252 SpA / 8 Spe  
Modest Nature  
IVs: 0 Atk  
- Trick  
- Oblivion Wing  
- Chatter  
- Taunt