Diancie-Mega @ Diancite  
Ability: Magic Bounce  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Stealth Rock  
- Diamond Storm  
- Endeavor  
- Explosion  

Kommo-o @ Salac Berry  
Ability: Bulletproof  
EVs: 52 HP / 204 Atk / 252 Spe  
Jolly Nature  
- Belly Drum  
- Substitute  
- Drain Punch  
- Thunder Punch  

Victini @ Choice Scarf  
Ability: Victory Star  
EVs: 252 HP / 4 Atk / 252 Spe  
Jolly Nature  
- V-create  
- U-turn  
- Final Gambit  
- Trick  

Serperior @ Leftovers  
Ability: Contrary  
EVs: 56 HP / 200 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk / 30 SpA / 30 Spe  
- Leaf Storm  
- Hidden Power [Fire]  
- Substitute  
- Leech Seed  

Magearna @ Fairium Z  
Ability: Soul-Heart  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Shift Gear  
- Thunderbolt  
- Ice Beam  
- Fleur Cannon  

Greninja-Ash (M) @ Choice Specs  
Ability: Battle Bond  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
- Hydro Pump  
- Dark Pulse  
- Water Shuriken  
- U-turn