Blissey (F) @ Fairium Z  
Ability: Serene Grace  
EVs: 200 HP / 252 Def / 56 Spe  
Bold Nature  
IVs: 0 Atk  
- Charm  
- Soft-Boiled  
- Calm Mind  
- Ice Beam  

Mew @ Kee Berry  
Ability: Synchronize  
EVs: 240 HP / 16 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Will-O-Wisp  
- Soft-Boiled  
- Taunt  
- Seismic Toss  

Charizard-Mega-Y @ Charizardite Y  
Ability: Blaze  
EVs: 216 HP / 108 SpA / 184 Spe  
Timid Nature  
- Blast Burn  
- Solar Beam  
- Air Slash  
- Flame Charge