Happy Birthday (Mewtwo-Mega-Y) @ Mewtwonite Y  
Ability: Insomnia  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Psystrike  
- Ice Beam  
- Fire Blast  
- Recover  

Lugia (Yveltal) @ Choice Scarf  
Ability: Dark Aura  
EVs: 4 Atk / 252 SpA / 252 Spe  
Modest Nature  
- Oblivion Wing  
- U-turn  
- Foul Play  
- Dark Pulse  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 252 HP / 4 Atk / 252 SpD  
Sassy Nature  
- Stealth Rock  
- Fire Blast  
- Precipice Blades  
- Roar  

Giratina-Origin @ Griseous Orb  
Ability: Levitate  
EVs: 248 HP / 252 Atk / 8 SpD  
Adamant Nature  
- Defog  
- Earthquake  
- Shadow Sneak  
- Dragon Tail  

Magearna @ Leftovers  
Ability: Soul-Heart  
EVs: 252 HP / 120 SpA / 136 SpD  
Calm Nature  
IVs: 0 Atk / 30 Spe  
- Pain Split  
- Heart Swap  
- Heal Bell  
- Fleur Cannon  

Kyogre-Primal @ Blue Orb  
Ability: Primordial Sea  
EVs: 100 HP / 156 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Origin Pulse  
- Calm Mind  
- Thunder  
- Ice Beam