Latias (F) @ Leftovers  
Ability: Levitate  
EVs: 28 HP / 4 Def / 252 SpA / 4 SpD / 220 Spe  
Timid Nature  
IVs: 0 Atk  
- Ice Beam  
- Psychic  
- Thunderbolt  
- Calm Mind  

Metagross @ Choice Band  
Ability: Clear Body  
EVs: 184 HP / 252 Atk / 72 Spe  
Adamant Nature  
- Meteor Mash  
- Earthquake  
- Shadow Ball  
- Explosion  

Blissey (F) @ Leftovers  
Ability: Natural Cure  
EVs: 252 HP / 252 Def / 4 SpD  
Bold Nature  
IVs: 0 Atk  
- Seismic Toss  
- Toxic  
- Soft-Boiled  
- Aromatherapy