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

Arceus-Ground @ Earth Plate  
Ability: Multitype  
EVs: 252 HP / 40 Def / 24 SpD / 192 Spe  
Timid Nature  
IVs: 0 Atk  
- Judgment  
- Recover  
- Ice Beam  
- Defog  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 252 HP / 56 Def / 200 SpD  
Relaxed Nature  
- Stealth Rock  
- Precipice Blades  
- Overheat  
- Toxic  

Magearna @ Leftovers  
Ability: Soul-Heart  
EVs: 252 HP / 4 Def / 252 SpD  
Calm Nature  
- Heart Swap  
- Fleur Cannon  
- Volt Switch  
- Heal Bell  

Yveltal @ Choice Scarf  
Ability: Dark Aura  
EVs: 72 HP / 252 Def / 184 Spe  
Jolly Nature  
- Foul Play  
- U-turn  
- Toxic  
- Defog  

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