Latios-Mega @ Latiosite  
Ability: Levitate  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Thunderbolt  
- Ice Beam  
- Psychic  
- Roost  

Slowbro (M) @ Rocky Helmet  
Ability: Regenerator  
EVs: 248 HP / 244 Def / 16 SpD  
Bold Nature  
IVs: 0 Atk  
- Grass Knot  
- Fire Blast  
- Scald  
- Slack Off  

Celebi @ Colbur Berry  
Ability: Natural Cure  
EVs: 252 HP / 152 Def / 104 Spe  
Timid Nature  
IVs: 0 Atk  
- Stealth Rock  
- Giga Drain  
- Nasty Plot  
- Recover  

Mew @ Colbur Berry  
Ability: Synchronize  
EVs: 48 HP / 252 Def / 208 Spe  
Impish Nature  
- Will-O-Wisp  
- Knock Off  
- Taunt  
- Roost  

Jirachi @ Leftovers  
Ability: Serene Grace  
EVs: 252 HP / 16 Atk / 64 Def / 176 Spe  
Jolly Nature  
- Fire Punch  
- Iron Head  
- Substitute  
- Toxic  

Victini @ Choice Scarf  
Ability: Victory Star  
EVs: 252 Atk / 4 SpA / 252 Spe  
Hasty Nature  
- Bolt Strike  
- Blue Flare  
- V-create  
- U-turn