Gengar-Mega @ Black Sludge  
Ability: No Guard  
Tera Type: Ghost  
EVs: 248 HP / 8 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Substitute  
- Baton Pass  
- Sheer Cold  
- Dark Void  

Rayquaza-Mega @ Sky Plate  
Ability: Mold Breaker  
Tera Type: Dragon  
EVs: 252 HP / 80 Def / 8 SpA / 168 Spe  
Modest Nature  
IVs: 0 Atk  
- Quiver Dance  
- Oblivion Wing  
- Dark Void  
- Substitute  

Mewtwo-Mega-X @ Mewtwonite Y  
Ability: Wonder Guard  
Tera Type: Psychic  
EVs: 252 HP / 40 Def / 216 Spe  
Jolly Nature  
- Low Kick  
- Sheer Cold  
- Recover  
- Stealth Rock  

Kyogre-Primal @ Toxic Orb  
Ability: Poison Heal  
Tera Type: Water  
EVs: 252 HP / 252 Def / 4 SpD  
Impish Nature  
- Water Shuriken  
- Icicle Spear  
- Recover  
- Will-O-Wisp  

Audino-Mega @ Shed Shell  
Ability: Wonder Guard  
Tera Type: Normal  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Baton Pass  
- Recover  
- Chatter  
- Whirlwind  

Mewtwo-Mega-X @ Leftovers  
Ability: Shadow Tag  
Tera Type: Psychic  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Low Kick  
- Encore  
- Perish Song  
- Spikes