Mewtwo-Mega-Y @ Mewtwonite Y  
Ability: Insomnia  
EVs: 40 Def / 216 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Psystrike  
- Ice Beam  
- Fire Blast  
- Calm Mind  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 252 HP / 112 Def / 144 SpD  
Relaxed Nature  
- Overheat  
- Earthquake  
- Stealth Rock  
- Toxic  

Magearna @ Normalium Z  
Ability: Soul-Heart  
EVs: 252 HP / 4 SpA / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Fleur Cannon  
- Heal Bell  
- Heart Swap  
- Volt Switch  

Yveltal @ Dread Plate  
Ability: Dark Aura  
EVs: 248 HP / 176 Atk / 84 Spe  
Jolly Nature  
- Toxic  
- Sucker Punch  
- Knock Off  
- Roost  

Arceus-Ground @ Earth Plate  
Ability: Multitype  
EVs: 252 HP / 160 Def / 96 Spe  
Timid Nature  
IVs: 0 Atk  
- Calm Mind  
- Judgment  
- Ice Beam  
- Recover  

Kyogre-Primal @ Blue Orb  
Ability: Primordial Sea  
EVs: 252 HP / 252 SpA / 4 Spe  
Modest Nature  
IVs: 0 Atk  
- Toxic  
- Ice Beam  
- Origin Pulse  
- Rest