No you need a female politoad/poliwag with drizzle and a male of any kind pokemon that will breed with politoad ... in other words a pokemon in the "water 1" group. You could use a male poliwag or politoad. The male doesn't need drizzle only the female. The question is ... is your one politoad female ;).
so let me get this straight. u need both a male AND female with drizzle for it to pass on? and u cant use ditto? cause i only have one politoad with drizzle :(
My understanding is yes if you breed a female politoed or poliwag with drizzle then yes it can be bred. Using only the male with drizzle or using ditto as the father won't work.
In regards to trading for the Politoed with Drizzle. I have pretty much all of Gen 5 pokemon. I have an Exeggcute with harvest from the DW. I have a Ponyta with Flame Body from DW. I have lot of the starters from previous gens. I have Zorua, Buneary, Skitty, Smeargle, Heracross, Musharna, Horsea, Ferroseed (with leech seed), and Spiritomb and others.