Deoxys-Attack @ Focus Sash  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Lonely Nature  
- Light That Burns the Sky  
- Sunsteel Strike  
- Photon Geyser  
- Shell Smash  

Mewtwo-Mega-Y @ Terrain Extender  
Ability: Psychic Surge  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
- Taunt  
- Sticky Web  
- Stealth Rock  
- Photon Geyser  

Giratina-Origin @ Figy Berry  
Ability: Innards Out  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- U-turn  
- Moongeist Beam  
- Defog  
- Shore Up  

Chansey (F) @ Darkinium Z  
Ability: Innards Out  
EVs: 252 HP / 252 SpD / 252 Spe  
Gentle Nature  
IVs: 0 Atk / 0 Def  
- Defog  
- Shore Up  
- Parting Shot  
- Whirlwind  

Mewtwo-Mega-Y @ Ring Target  
Ability: Innards Out  
EVs: 252 HP / 252 SpA / 252 Spe  
Mild Nature  
IVs: 0 Def / 0 SpD  
- Light That Burns the Sky  
- Shell Smash  
- Trick  
- Photon Geyser  

Deoxys-Attack @ Choice Scarf  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 SpA / 252 SpD / 252 Spe  
Hasty Nature  
IVs: 0 Def / 30 SpA  
- Sacred Fire  
- Photon Geyser  
- Light That Burns the Sky  
- U-turn