Slaking @ Leppa Berry  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Fake Out  
- Extreme Speed  
- Extreme Evoboost  
- Sunsteel Strike  

Mewtwo-Mega-Y @ Choice Scarf  
Ability: Parental Bond  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
- Photon Geyser  
- Searing Shot  
- Bug Buzz  
- Ice Beam  

Mewtwo-Mega-X @ Electric Memory  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Naughty Nature  
- Sunsteel Strike  
- V-create  
- Ice Shard  
- Multi-Attack  

Beedrill (Beedrill-Mega) @ Focus Sash  
Ability: Magic Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Pursuit  
- Spectral Thief  
- Defog  
- U-turn  

Kyogre-Primal @ Safety Goggles  
Ability: Wonder Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
IVs: 0 Spe  
- Shore Up  
- Baton Pass  
- Spectral Thief  
- Aromatherapy  

Blissey (F) @ Lum Berry  
Ability: Innards Out  
EVs: 252 HP / 252 SpD  
Gentle Nature  
IVs: 0 Atk / 0 Def / 0 Spe  
- Shore Up  
- Whirlwind  
- Parting Shot  
- Magic Coat