Mewtwo-Mega-X @ Focus Sash  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Lonely Nature  
- Shell Smash  
- Moongeist Beam  
- Searing Sunraze Smash  
- Let's Snuggle Forever  

Mewtwo-Mega-X @ Choice Scarf  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- U-turn  
- Beat Up  
- Let's Snuggle Forever  
- Photon Geyser  

Kartana @ Focus Sash  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Shell Smash  
- Sunsteel Strike  
- Searing Sunraze Smash  
- Ice Shard  

Meloetta @ Darkinium Z  
Ability: Wonder Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Parting Shot  
- Spectral Thief  
- Aromatherapy  
- Shore Up  

Steelix-Mega @ Safety Goggles  
Ability: Prankster  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Thousand Waves  
- Will-O-Wisp  
- Haze  
- Shore Up  

Swampert-Mega @ Shed Shell  
Ability: Wonder Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Careful Nature  
- Thousand Waves  
- Spikes  
- Defog  
- Shore Up