Giratina @ Leftovers  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Calm Nature  
IVs: 0 Atk  
- Sticky Web  
- Skill Swap  
- Whirlwind  
- Core Enforcer  

Zygarde-Complete @ Leftovers  
Ability: Defiant  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naughty Nature  
- Spectral Thief  
- Thousand Arrows  
- Core Enforcer  
- Shore Up  

Mewtwo-Mega-Y @ Safety Goggles  
Ability: Competitive  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Psystrike  
- Psycho Boost  
- Ice Beam  
- Volt Switch  

Kyogre-Primal @ Leftovers  
Ability: Competitive  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Gentle Nature  
- Baton Pass  
- Shore Up  
- Steam Eruption  
- Spectral Thief  

Rayquaza-Mega @ Life Orb  
Ability: Triage  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Oblivion Wing  
- Taunt  
- Substitute  
- Tail Glow 

Tyranitar-Mega @ Choice Band  
Ability: Defiant  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Adamant Nature  
- Beat Up  
- Head Smash  
- Accelerock  
- U-turn