The SacTowns, Scrooge McSam & GC Invade SoCal in December

[Cadaverous Pallor]

Originally Posted by €uroMeinke

It's a prequel
(Might ask the same thing about the Wicked Queen from Snow White)

I cooked up a better answer - it's all about imagination anyway, so none of them need to be alive.

One could argue that at the very least the Wicked Queen must exist, as she starts the mischief, but I'd say that she's just a face for the darker side of Mickey's subconscious.