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 Bomb  
- Bug Buzz  
- Ice Beam  
- Sludge Bomb  
- Earth Power  
- U-Turn  
- Secret Sword  

Mewtwo-Mega-Y @ Choice Scarf  
Ability: Parental Bond  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
- Photon Geyser  
- Bug Buzz  
- Searing Shot  
- Ice Beam  
- Earth Power  

Slaking @ Leppa Berry/Silk Scarf  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- Fake Out  
- Extreme Speed  
- Sunsteel Strike  
- Extreme Evoboost  
- Shell Smash  

Diancie-Mega @ Pixie Plate/Focus Sash  
Ability: Pixilate  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
- Fake Out  
- Extreme Speed  
- Boomburst  
- Spikes  
- Shell Smash  
- Sunsteel Strike  
- Moongeist Beam  

Heracross-Mega @ Choice Band  
Ability: Huge Power  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Adamant Nature  
- First Impression  
- Sunsteel Strike  
- Ice Shard  
- Close Combat  
- V-Create  

Rayquaza-Mega @ Focus Sash  
Ability: Triage  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Tail Glow  
- Oblivion Wing  
- Moongeist Beam  
- Draining Kiss