Arceus @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 84 Def / 8 SpA / 56 SpD / 108 Spe  
Calm Nature  
IVs: 0 Atk  
- Chatter  
- Baton Pass  
- Heal Order  
- Stealth Rock  

Rayquaza-Mega @ Mental Herb  
Ability: Mold Breaker  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Oblivion Wing  
- Shell Smash  
- King's Shield  
- Dark Void  

Chansey (F) @ Eviolite  
Ability: Imposter  
EVs: 248 HP / 16 Def / 244 SpD  
Sassy Nature  
IVs: 0 Atk / 30 SpA / 30 Spe  
- Whirlwind  
- Sleep Talk  
- Chatter  
- Soft-Boiled  

Swampert-Mega @ Safety Goggles  
Ability: Wonder Guard  
EVs: 248 HP / 4 Atk / 196 Def / 60 SpD  
Brave Nature  
IVs: 0 Spe  
- Ice Shard  
- Recover  
- Parting Shot  
- Aromatherapy  

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

Aegislash @ Leftovers  
Ability: Magic Bounce  
EVs: 248 HP / 80 SpD / 180 Spe  
Calm Nature  
IVs: 0 Atk  
- Substitute  
- Baton Pass  
- Curse  
- Roost