How do you unlock the Duck Hunt characters in Super Smash Bros. Wii U?

The Duck Hunt dog and his ducky friend (weird, right?) are undoubtedly some of the cutest characters in Super Smash Bros. Wii U, but how do you go about unlocking this dynamic duo? There are already so many other characters to unlock, things can get a bit confusing. Shacknews breaks it down for you in the video below. And which character is your favorite? Settle it in Smash!