Groudon @ Leftovers  
Ability: Drought  
EVs: 252 HP / 200 SpD / 56 Spe  
Careful Nature  
- Earthquake  
- Rock Slide  
- Thunder Wave  
- Swords Dance  

Dialga @ Leftovers  
Ability: Pressure  
EVs: 248 HP / 24 Def / 216 SpD / 20 Spe  
Calm Nature  
IVs: 0 Atk  
- Dragon Pulse  
- Thunder  
- Roar  
- Stealth Rock  

Ho-Oh @ Life Orb  
Ability: Regenerator  
EVs: 24 HP / 252 Atk / 232 Spe  
Adamant Nature  
- Sacred Fire  
- Earthquake  
- Recover  
- Thunder Wave  

Rayquaza @ Choice Band  
Ability: Air Lock  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Dragon Ascent  
- Extreme Speed  
- Earthquake  
- Outrage  

Giratina-Origin @ Griseous Orb  
Ability: Levitate  
EVs: 252 Def / 200 SpA / 56 Spe  
Modest Nature  
IVs: 0 Atk  
- Draco Meteor  
- Hex  
- Thunder Wave  
- Defog  

Mewtwo @ Choice Scarf  
Ability: Unnerve  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Psystrike  
- Ice Beam  
- Thunder  
- Future Sight