Deoxys-Speed @ Choice Scarf  
Ability: Trace  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Trick  
- Spikes  
- Encore  
- U-turn  

Rayquaza-Mega @ Focus Sash  
Ability: Triage  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
- Oblivion Wing  
- Tail Glow  
- Photon Geyser  
- Sludge Wave  

Mewtwo-Mega-Y @ Focus Sash  
Ability: Dazzling  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
- Shell Smash  
- Light That Burns the Sky  
- Photon Geyser  
- Earth Power  

Arceus @ Fist Plate  
Ability: Wonder Guard  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Moongeist Beam  
- Taunt  
- Shell Smash  
- Judgment  

Kartana @ Focus Sash  
Ability: Magic Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 250 Spe  
Impish Nature  
- Pursuit  
- Storm Throw  
- Defog  
- Haze  

Hoopa-Unbound @ Pixie Plate  
Ability: Wonder Guard  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
- Shell Smash  
- Judgment  
- Photon Geyser  
- Hyperspace Fury