Junior from "Bellboy Donald" and PJ from Goof Troop
are the same character
Well, there's at least one fanfic of House of Mouse
supporting the theory.
Pete lost his leg in World War I
, and became a crook to live after the economic crisis took away his pension
Also, he was reactivated as an instructor during World War II
, and was Donald's drill sergeant when a bureaucratic error put him in the US Army for a while (he later returned to the Navy).