Yveltal @ Heavy-Duty Boots  
Ability: Aerilate  
Tera Type: Dark  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Hasty Nature  
- Boomburst  
- Rapid Spin  
- Volt Switch  
- Strength Sap  

Steelix-Mega @ Assault Vest  
Ability: Regenerator  
Tera Type: Steel  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Gigaton Hammer  
- Stone Axe  
- Knock Off  
- U-turn  

Alakazam-Mega @ Choice Specs  
Ability: Beads of Ruin  
Tera Type: Psychic  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Psystrike  
- Discharge  
- Moonblast  
- Volt Switch  

Chansey (F) @ Eviolite  
Ability: Imposter  
Tera Type: Normal  
EVs: 252 HP / 252 Def / 252 SpD / 252 Spe  
Bold Nature  
IVs: 0 Atk  
- Jungle Healing  
- Block  
- Ruination  
- Court Change  

Zekrom @ Life Orb  
Ability: Adaptability  
Tera Type: Dragon  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naive Nature  
- Volt Tackle  
- Draco Meteor  
- Shift Gear  
- V-create  

Altaria-Mega @ Leftovers  
Ability: Fur Coat  
Tera Type: Dragon  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Bold Nature  
IVs: 0 Atk  
- Moonblast  
- Knock Off  
- Haze  
- Recover