Groudon-Primal @ Choice Band  
Ability: Shadow Tag  
EVs: 4 HP / 252 Atk / 252 Spe  
Jolly Nature  
- Thousand Arrows  
- V-create  
- Trick  
- Ice Punch  

Mewtwo-Mega-Y @ Focus Sash  
Ability: No Guard  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Seed Flare  
- Sludge Wave  
- Sing  
- Sheer Cold  

Deoxys-Attack @ Leftovers  
Ability: Wonder Guard  
EVs: 252 SpA / 252 Spe  
Hasty Nature  
IVs: 0 Def  
- Gastro Acid  
- Psystrike  
- Substitute  
- Baton Pass  

Audino-Mega @ Shed Shell  
Ability: Wonder Guard  
EVs: 252 HP / 252 Def / 4 SpD  
Relaxed Nature  
IVs: 0 Atk / 0 Spe  
- Recover  
- Aromatherapy  
- Defog  
- Baton Pass  

Gengar-Mega @ Spooky Plate  
Ability: Mold Breaker  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Taunt  
- Shell Smash  
- Judgment  
- Secret Sword  

Gyarados-Mega @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 152 Def / 104 SpD  
Calm Nature  
IVs: 0 Atk  
- Will-O-Wisp  
- Foul Play  
- King's Shield  
- Recover