Mewtwo-Mega-Y @ Mewtwonite Y  
Ability: Unnerve  
EVs: 40 Def / 216 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Psystrike  
- Ice Beam  
- Taunt  
- Focus Blast  

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

Arceus-Dark @ Dread Plate  
Ability: Multitype  
EVs: 252 HP / 160 Def / 96 Spe  
Timid Nature  
IVs: 0 Atk  
- Judgment  
- Recover  
- Ice Beam  
- Toxic  

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  

Giratina-Origin @ Griseous Orb  
Ability: Levitate  
EVs: 248 HP / 208 SpA / 52 SpD  
Modest Nature  
IVs: 0 Atk  
- Defog  
- Hex  
- Dragon Pulse  
- Will-O-Wisp  

Zygarde @ Leftovers  
Ability: Power Construct  
EVs: 252 HP / 252 Def / 4 SpD  
Impish Nature  
- Coil  
- Rest  
- Thousand Arrows  
- Glare