Tyranitar-Mega @ Safety Goggles  
Ability: Prankster  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Impish Nature  
- Rock Blast  
- Shore Up  
- Destiny Bond  
- Glare  

Look At Me (Mewtwo-Mega-X) @ Expert Belt  
Ability: Technician  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Naive Nature  
- Storm Throw  
- Frost Breath  
- Bonemerang  
- Sunsteel Strike  

Rayquaza-Mega @ Choice Specs  
Ability: Aerilate  
Shiny: Yes  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Boomburst  
- Draco Meteor  
- Blue Flare  
- Earth Power  

Celesteela @ Waterium Z  
Ability: Primordial Sea  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Calm Nature  
IVs: 0 Atk  
- Heal Order  
- Sparkling Aria  
- Defog  
- Entrainment  

Chansey @ Choice Scarf  
Ability: Imposter  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Fake Out  
- Trick  
- Slack Off  
- Final Gambit  

Slowbro-Mega @ Toxic Orb  
Ability: Poison Heal  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- U-turn  
- Spiky Shield  
- Photon Geyser  
- Core Enforcer