Mewtwo-Mega-X @ Life Orb  
Ability: Huge Power  
EVs: 252 Atk / 4 SpA / 252 Spe  
Naive Nature  
- Sacred Fire  
- Freeze-Dry  
- Water Shuriken  
- Play Rough  

Mewtwo-Mega-X @ Shed Shell  
Ability: Huge Power  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Knock Off  
- Close Combat  
- Diamond Storm  
- Poison Jab  

Groudon-Primal @ Choice Scarf  
Ability: Shadow Tag  
EVs: 252 Atk / 4 Def / 252 Spe  
Adamant Nature  
- Thousand Arrows  
- V-create  
- Trick  
- Fusion Bolt  

Electrode @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 8 Def / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Volt Switch  
- Gastro Acid  
- Recover  
- Defog  

Slowbro-Mega @ Leftovers  
Ability: Magic Bounce  
EVs: 248 HP / 252 Def / 8 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Volt Switch  
- King's Shield  
- Slack Off  
- Encore  

Yveltal @ Lum Berry  
Ability: Prankster  
EVs: 248 HP / 8 Def / 252 SpD  
Careful Nature  
- Gastro Acid  
- Roost  
- Pursuit  
- Haze