The Champion Duck (Aka Black Duck) is the main antagonist and the final boss of Duck Life 3, living in the area that the portal takes you to, which appears once you've won the 6th race in the Professional League. Their race is almost the same as any other race, except you have to shoot his army of Domo-Kuns that try to slow your duck down. its is the last level.
The Champion Duck has the same shape as the Supreme Duck, which your duck evolves into when entering the portal, regardless of which egg you picked, with black skin, and red pupils instead of white skin and green pupils. He is hard to beat, but if you do best the champion, you get a great reward.