Jellicent - Ghost/Water
Calm (+SpDef, -Atk)
EVs (252 HP, 220 SpDef, 36 Def)
Item: What you feel best suits it. Probably Leftovers.
Ability: Water Absorb
Mess with this Jelly and you will get burned.
Scald - Stab, burns target (30%)
Will-O-Wisp/Toxic - 100% Burn or Poison - if scalds not burning, something has to work.
Recover - Heal
Hex - Stab, covers ghost weakness, Doubles damage due to Will-O-Wisp or Scald