Nah, I'd win (Lunala) @ Safety Goggles  
Ability: Innards Out  
EVs: 252 HP / 252 Atk / 252 SpA / 252 Spe  
Rash Nature  
IVs: 0 Atk / 0 Def / 0 SpD  
- Moongeist Beam  
- Secret Sword  
- Sludge Wave  
- Shell Smash  

Perish (Heracross-Mega) @ Choice Band  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Adamant Nature  
- First Impression  
- Mach Punch  
- Shadow Sneak  
- Defog  

Deez Nuts (Lunala) @ Safety Goggles  
Ability: Innards Out  
EVs: 252 HP / 252 Atk / 252 SpA / 252 Spe  
Rash Nature  
IVs: 0 Atk / 0 Def / 0 SpD  
- Moongeist Beam  
- Secret Sword  
- Sludge Wave  
- Shell Smash  

:Nawwwww: (Gengar-Mega) @ Choice Scarf  
Ability: Parental Bond  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Moongeist Beam  
- Sludge Wave  
- Water Shuriken  
- Menacing Moonraze Maelstrom  

No U (Lunala) @ Safety Goggles  
Ability: Innards Out  
EVs: 252 HP / 252 Atk / 252 SpA / 252 Spe  
Rash Nature  
IVs: 0 Atk / 0 Def / 0 SpD  
- Moongeist Beam  
- Secret Sword  
- Sludge Wave  
- Shell Smash  

Standing Here (Mewtwo-Mega-X) @ Choice Scarf  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
IVs: 0 SpA  
- Photon Geyser  
- Play Rough  
- Thousand Arrows  
- Light That Burns the Sky