Yveltal @ Toxic Orb  
Ability: Magic Guard  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Strength Sap  
- Pursuit  
- Spectral Thief  
- Baton Pass  

Muk-Alola @ Safety Goggles  
Ability: Wonder Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Magic Coat  
- Shore Up  
- Circle Throw  
- U-turn  

Swampert-Mega @ Safety Goggles  
Ability: Wonder Guard  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Strength Sap  
- Topsy-Turvy  
- Defog  
- U-turn  

Mewtwo-Mega-X @ Life Orb  
Ability: Parental Bond  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Lonely Nature  
- Photon Geyser  
- Close Combat  
- First Impression  
- Freeze-Dry  

Slaking @ Shed Shell  
Ability: Huge Power  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Shell Smash  
- Extreme Speed  
- Bonemerang  
- Sunsteel Strike  

Chansey (F) @ Lum Berry  
Ability: Innards Out  
EVs: 252 HP / 252 SpD  
Sassy Nature  
IVs: 0 Def / 0 SpA / 0 Spe  
- Magic Coat  
- Shore Up  
- Whirlwind  
- U-turn