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

Groudon-Primal @ Red Orb  
Ability: Drought  
EVs: 180 HP / 252 SpA / 76 Spe  
Mild Nature  
- Stealth Rock  
- Precipice Blades  
- Overheat  
- Rock Tomb  

Ho-Oh @ Leftovers  
Ability: Regenerator  
EVs: 252 HP / 204 Def / 52 SpD  
Impish Nature  
- Sacred Fire  
- Recover  
- Toxic  
- Brave Bird  

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

Giratina-Origin @ Griseous Orb  
Ability: Levitate  
EVs: 252 Def / 252 SpA / 4 SpD  
Modest Nature  
IVs: 0 Atk  
- Hex  
- Draco Meteor  
- Toxic  
- Defog  

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