Omastar @ Focus Sash  
Ability: Weak Armor  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Surf  
- Ice Beam / Knock Off
- Stealth Rock / Spikes
- Shell Smash  

Omastar @ Rockium Z  
Ability: Weak Armor  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Surf  
- Ice Beam  
- Ancient Power  
- Shell Smash