Mewtwo-Mega-Y @ Leppa Berry  
Ability: Harvest  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
- Extreme Evoboost  
- Menacing Moonraze Maelstrom  
- Light That Burns the Sky  
- Let's Snuggle Forever  

Mewtwo-Mega-Y @ Focus Sash  
Ability: No Guard  
EVs: 248 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Magma Storm  
- Sheer Cold  
- Zap Cannon  
- Taunt  

Mewtwo-Mega-Y @ Focus Sash  
Ability: Magic Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Hasty Nature  
- Photon Geyser  
- Light of Ruin  
- Thousand Arrows  
- Shell Smash  

Blissey (F) @ Choice Scarf  
Ability: Imposter  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Trick  
- Anchor Shot  
- Perish Song  
- Shore Up  

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

Houndoom-Mega @ Fist Plate  
Ability: Wonder Guard  
EVs: 248 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Shell Smash  
- Light That Burns the Sky  
- Night Daze  
- Judgment