Marshadow @ Marshadium Z  
Ability: Technician  
Tera Type: Fighting  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Spectral Thief  
- Shadow Sneak  
- Drain Punch  
- Bulk Up  

Zacian-Crowned @ Rusted Sword  
Ability: Intrepid Sword  
Tera Type: Fairy  
EVs: 4 HP / 252 Atk / 252 Spe  
Jolly Nature  
- Swords Dance  
- Behemoth Blade  
- Play Rough  
- Close Combat  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
Tera Type: Ground  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Spikes  
- Precipice Blades  
- Heat Crash  
- Swords Dance  

Mewtwo-Mega-Y @ Mewtwonite Y  
Ability: Insomnia  
Tera Type: Psychic  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Nasty Plot  
- Ice Beam  
- Psystrike  
- Recover