Block_that_Kick posted...
They arent? Launchpad has talked before about living in Duckberg and working for Scrooge McDuck. And I remember reading a Disney comic where Scrooge and Darkwing were in the same room.
Boom Studios had the license to produce Disney comics for a while, and they made both Ducktales and Darkwing Duck at the same time.
These were set after the cartoons, and they had a shared universe because they wanted that. One of the jokes was that Scrooge and Darkwing signed a contract about Launchpaf custody.