Xerneas @ Power Herb  
Ability: Fairy Aura  
EVs: 148 HP / 28 Def / 252 SpA / 80 Spe  
Modest Nature  
- Moonblast  
- Hidden Power [Rock]  
- Aromatherapy  
- Geomancy  
 
Salamence (Salamence-Mega) (M) @ Salamencite  
Ability: Aerilate  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Double-Edge  
- Earthquake  
- Roost  
- Dragon Dance  
 
Deoxys-Attack @ Focus Sash  
Ability: Pressure  
EVs: 40 Atk / 216 SpA / 252 Spe  
Naive Nature  
- Psycho Boost  
- Knock Off  
- Extreme Speed  
- Superpower  
 
Groudon @ Red Orb  
Ability: Drought  
EVs: 248 HP / 52 Def / 192 SpD / 16 Spe  
Careful Nature  
- Earthquake  
- Lava Plume  
- Stealth Rock  
- Roar  
 
Arceus @ Lum Berry  
Ability: Multitype  
EVs: 252 Atk / 4 Def / 252 Spe  
Jolly Nature  
- Extreme Speed  
- Earthquake  
- Stone Edge  
- Swords Dance  
 
Mewtwo @ Life Orb  
Ability: Unnerve  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Psystrike  
- Ice Beam  
- Fire Blast  
- Taunt