Mewtwo-Mega-Y @ Leftovers  
Ability: Bad Dreams  
EVs: 248 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Photon Geyser  
- Spore  
- Substitute  
- Tail Glow  

Zeraora  
Ability: Magician  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Sunsteel Strike  
- Toxic Thread  
- Fling  
- Parting Shot  

Diancie-Mega @ Choice Scarf  
Ability: Shadow Tag  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naughty Nature  
- Fleur Cannon  
- Trick  
- Precipice Blades  
- Searing Shot  

Scizor-Mega @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 252 Def / 252 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 SpA / 0 Spe  
- Baton Pass  
- Defog  
- Whirlwind  
- Recover  

Yveltal @ Leftovers  
Ability: Magic Bounce  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Impish Nature  
- Beak Blast  
- Roost  
- Parting Shot  
- Spectral Thief  

Necrozma-Dawn-Wings @ Ultranecrozium Z  
Ability: Wonder Guard  
EVs: 248 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Rash Nature  
- Shell Smash  
- King's Shield  
- Moongeist Beam  
- Sunsteel Strike