Diancie-Mega @ Focus Sash  
Ability: Magic Guard  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Shell Smash  
- Light of Ruin  
- Mind Blown  
- Moongeist Beam  

Chansey @ Eviolite  
Ability: Imposter  
Happiness: 80  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Calm Nature  
IVs: 0 Spe  
- Anchor Shot  
- Topsy-Turvy  
- Soft-Boiled  
- Spikes  

Dialga @ Steelium Z  
Ability: Magic Bounce  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 192 Spe  
Sassy Nature  
IVs: 0 Spe  
- Anchor Shot  
- Core Enforcer  
- Spectral Thief  
- Shore Up  

Slowbro-Mega @ Rocky Helmet  
Ability: Soundproof  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Relaxed Nature  
IVs: 0 Spe  
- Defog  
- Shore Up  
- Haze  
- U-turn  

Rayquaza-Mega @ Sky Plate  
Ability: Aerilate  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Lonely Nature  
- Extreme Speed  
- Fake Out  
- Earthquake  
- Boomburst  

Yveltal @ Assault Vest  
Ability: Regenerator  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Revelation Dance  
- Rapid Spin  
- Knock Off  
- U-turn