Meloetta @ Leftovers  
Ability: Wonder Guard  
EVs: 252 HP / 200 SpD / 56 Spe  
Calm Nature  
IVs: 0 Atk  
- Substitute  
- Baton Pass  
- Shell Smash  
- Dark Void  

Slaking @ Leftovers  
Ability: Shadow Tag  
EVs: 248 HP / 252 Atk / 8 Def  
Adamant Nature  
- Fake Out  
- Extreme Speed  
- Low Kick  
- Water Shuriken  

Mewtwo-Mega-Y @ Shed Shell  
Ability: Protean  
EVs: 4 Def / 252 SpA / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Freeze-Dry  
- Earth Power  
- Sludge Wave  
- Secret Sword  

Rayquaza-Mega @ Mental Herb  
Ability: Teravolt  
EVs: 116 Atk / 252 SpA / 140 Spe  
Mild Nature  
- Quiver Dance  
- Dark Void  
- Oblivion Wing  
- Thousand Arrows  

Giratina @ Safety Goggles  
Ability: Prankster  
EVs: 252 HP / 252 Def / 4 Spe  
Bold Nature  
IVs: 0 Atk  
- Spore  
- Encore  
- Roost  
- Curse  

Kyogre-Primal @ Safety Goggles  
Ability: Wonder Guard  
EVs: 252 HP / 4 Def / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Stealth Rock  
- Defog  
- Roost  
- Steam Eruption