Jellicent @ Mystic Water  
Ability: Water Absorb  
Level: 50  
EVs: 252 HP / 4 Def / 252 SpA  
Quiet Nature  
IVs: 0 Atk / 0 Spe  
- Water Spout  
- Trick Room  
- Scald  
- Protect

Unown
Options:
- offensive: Shadow Ball, Energy Ball, Hydro Pump
- supportive: Strength Sap, Will-O-Wisp, Taunt
- items: Waterium Z, Sitrus Berry

Unown
Offensive calcs:
- 252+ SpA Mystic Water Jellicent Water Spout (150 BP) vs. 236 HP / 236+ SpD Incineroar in Heavy Rain: 222-264 (111 - 132%) -- guaranteed OHKO

Unown
Useful partners:
- redirector: Clefairy
- slow to moderately slow Rain setter: Mega Dhelmise, Mega Walrein