Mewtwo-Mega-Y @ Mewtwonite Y  
Ability: Insomnia  
EVs: 8 HP / 80 Def / 228 SpA / 192 Spe  
Timid Nature  
IVs: 0 Atk  
- Calm Mind  
- Psystrike  
- Fire Blast  
- Ice Beam  

Groudon-Primal @ Red Orb  
Ability: Drought  
EVs: 144 HP / 156 Atk / 56 SpD / 152 Spe  
Adamant Nature  
- Stealth Rock  
- Swords Dance  
- Precipice Blades  
- Rock Tomb  

Ho-Oh @ Choice Band  
Ability: Regenerator  
EVs: 4 HP / 252 Atk / 252 Spe  
Adamant Nature  
- Sacred Fire  
- Brave Bird  
- Earthquake  
- Toxic  

Toxapex @ Shed Shell  
Ability: Regenerator  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Toxic Spikes  
- Toxic  
- Haze  
- Recover

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

Giratina-Origin @ Griseous Orb  
Ability: Levitate  
EVs: 252 Def / 252 SpA / 4 SpD  
Modest Nature
- Hex  
- Draco Meteor  
- Will-O-Wisp  
- Defog