Mewtwo-Mega-Y @ Focus Sash  
Ability: Mold Breaker  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Tail Glow  
- Psystrike  
- Moonblast  
- Clangorous Soulblaze  

Chansey @ Eviolite  
Ability: Imposter  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Soft-Boiled  
- Spectral Thief  
- Baton Pass  
- Spikes  

Celesteela @ Safety Goggles  
Ability: Wonder Guard  
EVs: 252 HP / 252 Def / 252 SpD / 252 Spe  
Bold Nature  
IVs: 0 Atk  
- Aromatherapy  
- Recover  
- Stealth Rock  
- Parting Shot  

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

Gyarados-Mega @ Fairy Memory  
Ability: Wonder Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Shell Smash  
- Sunsteel Strike  
- Power Trip  
- Multi-Attack  

Groudon-Primal @ Ground Memory  
Ability: Magic Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Shell Smash  
- Multi-Attack  
- Sunsteel Strike  
- Spore