Diancie-Mega @ Diancite  
Ability: Magic Bounce  
EVs: 4 Atk / 252 SpA / 252 Spe  
Hasty Nature  
- Moonblast  
- Diamond Storm  
- Earth Power  
- Heal Bell  

Marshadow @ Marshadium Z  
Ability: Technician  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Shadow Sneak  
- Close Combat  
- Spectral Thief  
- Bulk Up  

Ho-Oh @ Choice Band  
Ability: Regenerator  
EVs: 56 HP / 252 Atk / 200 Spe  
Adamant Nature  
- Sacred Fire  
- Brave Bird  
- Earthquake  
- Toxic  

Arceus-Water @ Splash Plate  
Ability: Multitype  
EVs: 252 HP / 64 Def / 192 Spe  
Timid Nature  
IVs: 0 Atk  
- Recover  
- Will-O-Wisp  
- Defog  
- Ice Beam  

Magearna @ Leftovers  
Ability: Soul-Heart  
EVs: 252 HP / 4 Def / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Heart Swap  
- Fleur Cannon  
- Volt Switch  
- Pain Split  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 160 Atk / 152 SpD / 196 Spe  
Adamant Nature  
- Stone Edge  
- Precipice Blades  
- Stealth Rock  
- Swords Dance