Spectrier @ Sitrus Berry  
Ability: Grim Neigh  
EVs: 144 HP / 64 Def / 64 SpA / 52 SpD / 184 Spe  
Timid Nature  
IVs: 0 Atk  
- Calm Mind  
- Will-O-Wisp  
- Hex  
- Disable  

Diancie @ Choice Specs  
Ability: Clear Body  
EVs: 252 HP / 248 SpA / 8 SpD  
Calm Nature  
- Mystical Fire  
- Moonblast  
- Power Gem  
- Earth Power  

Registeel @ Assault Vest  
Ability: Clear Body  
EVs: 248 HP / 40 Atk / 56 Def / 164 SpD  
Careful Nature  
- Heavy Slam  
- Seismic Toss  
- Earthquake  
- Counter