Wailmer @ Mystic Water  
Ability: Water Veil  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 2 Atk / 30 SpA  
- Water Spout  
- Hydro Pump  
- Ice Beam  
- Hidden Power Grass
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Optional Move(s): 
- Double-Edge
- Earthquake
- Endure
- Rest
- Self-Destruct
- Sleep Talk
Optional Item(s): 
- Leftovers
- Petaya Berry
- Salac Berry
Optional Ability:  
- N/A
Optional EV/IV(s): 
- 252 SpA / 4 SpD / 252 Spe (Modest)
- 4 Atk / 252 SpA / 252 Spe (Hasty / Naive)