Kartana @ Focus Sash  
Ability: Magic Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Shell Smash  
- Sunsteel Strike  
- Spectral Thief  
- Defog  

Mewtwo-Mega-Y @ Terrain Extender  
Ability: Psychic Surge  
EVs: 248 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Photon Geyser  
- Taunt  
- Magic Coat  
- Stealth Rock  

Deoxys-Attack @ Focus Sash  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 248 SpA / 252 SpD / 252 Spe  
Hasty Nature  
IVs: 0 Def  
- Light That Burns the Sky  
- Photon Geyser  
- V-create  
- Attack Order  

Pokemon (Yveltal) @ Icicle Plate  
Ability: Wonder Guard  
EVs: 248 HP / 252 Atk / 252 Def / 248 SpA / 252 SpD / 252 Spe  
Adamant Nature  
- Shell Smash  
- Photon Geyser  
- Beat Up  
- Judgment  

Deoxys-Attack @ Focus Sash  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 248 SpA / 252 SpD / 248 Spe  
Hasty Nature  
IVs: 0 Def  
- Light That Burns the Sky  
- Pursuit  
- Let's Snuggle Forever  
- Searing Sunraze Smash  

Mewtwo-Mega-Y @ Leppa Berry  
Ability: Innards Out  
EVs: 252 HP / 252 Atk / 252 SpA / 252 Spe  
Hasty Nature  
IVs: 0 Def / 0 SpD  
- Shell Smash  
- Light That Burns the Sky  
- Let's Snuggle Forever  
- Earth Power