Victini @ Choice Band  
Ability: Victory Star  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- V-create  
- Zen Headbutt  
- Bolt Strike  
- Flame Charge  

Mew @ Mewnium Z  
Ability: Synchronize  
EVs: 120 HP / 40 Def / 188 SpA / 160 Spe  
Modest Nature  
IVs: 0 Atk  
- Skill Swap  
- Roost  
- Icy Wind  
- Psychic  

Altaria-Mega @ Altarianite  
Ability: Cloud Nine  
EVs: 252 HP / 128 Def / 28 SpA / 100 SpD  
Calm Nature  
IVs: 0 Atk  
- Cotton Guard  
- Roost  
- Hidden Power [Rock]  
- Hyper Beam