Gyarados-Mega @ Leftovers  
Ability: Unaware  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Impish Nature  
- Darkest Lariat  
- Soft-Boiled  
- U-turn  
- Rapid Spin  

Blissey @ Dread Plate  
Ability: Imposter  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
- Judgment  
- Whirlwind  
- Moongeist Beam  
- Spectral Thief  

Solgaleo @ Safety Goggles  
Ability: Fur Coat  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Impish Nature  
- Sunsteel Strike  
- U-turn  
- Strength Sap  
- Spectral Thief  

Venusaur-Mega @ Leftovers  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Bold Nature  
IVs: 0 Atk  
- Strength Sap  
- Toxic Spikes  
- Stealth Rock  
- Seed Flare  

Thundurus-Therian @ Power Herb  
Ability: Triage  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Oblivion Wing  
- Parabolic Charge  
- Geomancy  
- Draining Kiss  

Mewtwo-Mega-Y @ Leftovers  
Ability: Contrary  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Moongeist Beam  
- Overheat  
- Psycho Boost  
- Substitute