Sceptile-Mega @ Sceptilite  
Ability: Overgrow  
EVs: 252 SpA / 40 SpD / 216 Spe  
Timid Nature  
IVs: 3 HP / 0 Atk  
- Substitute  
- Grass Knot  
- Dragon Pulse  
- Endeavor  

Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 80 HP / 56 Def / 176 SpA / 196 Spe  
Modest Nature  
IVs: 0 Atk  
- Geomancy  
- Moonblast  
- Substitute  
- Endeavor  

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

Arceus @ Leftovers  
Ability: Multitype  
EVs: 240 HP / 252 Atk / 16 Spe  
Adamant Nature  
- Swords Dance  
- Extreme Speed  
- Substitute  
- Shadow Claw  

Yveltal @ Metronome  
Ability: Dark Aura  
EVs: 24 HP / 84 Def / 216 SpA / 184 Spe  
Modest Nature  
- Dark Pulse  
- Sucker Punch  
- Oblivion Wing  
- Taunt  

Groudon-Primal @ Red Orb  
Ability: Desolate Land  
EVs: 248 HP / 72 Atk / 68 SpD / 120 Spe  
Adamant Nature  
- Stealth Rock  
- Rock Tomb  
- Precipice Blades  
- Roar