Quoted By:
Throw a swift swim Golduck in there.
Ability: Swift Swim
Nature: Modest (+sp.atk, -atk)
If you want to do EVs, dump them in Sp.Atk and split the rest elsewhere. Remember your speed will be doubled by swift swim, but you may still want to add some to speed. Its just story tho lol.
Item: Wide Lens
Moves:
Calm Mind
Hydro Pump
Focus Blast
? maybe have him have rain dance as a back up? Or put Scald here, or if you are ballsy, put Blizzard.
And a Drizzle Politoed
Ability: Drizzle
Nature: Bold, Lax, Calm or Careful (+either def, - either atk)
EVs: dump into HP and split the SpDef / Def
Item: Leftovers
Moves:
Toxic
Swagger
Protect
Perish Song