Mewtwo-Mega-X @ Lum Berry  
Ability: Huge Power  
EVs: 252 Atk / 36 Def / 220 Spe  
Adamant Nature  
- Ice Shard  
- Gear Grind  
- Play Rough  
- Beat Up  

Mewtwo-Mega-X @ Expert Belt  
Ability: Huge Power  
EVs: 252 Atk / 132 Def / 124 Spe  
Adamant Nature  
- Water Shuriken  
- Poison Jab  
- Mach Punch  
- Petal Blizzard  

Groudon-Primal @ Choice Scarf  
Ability: Shadow Tag  
EVs: 80 HP / 252 Atk / 176 Spe  
Jolly Nature  
- Thousand Arrows  
- V-create  
- Icicle Crash  
- Trick  

Beedrill-Mega @ Black Sludge  
Ability: Wonder Guard  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Taunt  
- Spikes  
- Trick  
- U-turn  

Swampert-Mega @ Shed Shell  
Ability: Wonder Guard  
EVs: 248 HP / 252 Def / 8 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Defog  
- Aromatherapy  
- Roost  
- Parting Shot  

Aegislash @ Leftovers  
Ability: Magic Bounce  
EVs: 248 HP / 80 SpD / 180 Spe  
Calm Nature  
IVs: 0 Atk  
- Substitute  
- Curse  
- Roost  
- Baton Pass