Politoed is an evolution from Poliwhirl when traded holding a King's Rock. It is one of Poliwag's final forms, the other being Poliwrath.
In Bulbapedia says some moves can only be learned by breeding, and this is my question.
When you Breed an evolved Pokemon, you will always get the first evolution. In cases like this (evolution by trade), does it work the same way? If I put 2 Politoeds in day care (male and female), will they produce an egg of Poliwag or Politoed?