Fictional Billionaires (Forbes.com) Forbes.com - Mickey Mouse may be 75, but age hasn't put a damper on his earning power. Last year Mickey and Disney pals Minnie, Donald, Daisy, Pluto and Goofy grossed  #36;5.8 billion from toys, movies and the like. That's 23 more than the year before, when Disney's Winnie the Pooh topped the list. Why the mouse's rebound? Credit hoopla and new products--including adult apparel--tied to Mickey's milestone birthday last year. For more details, stories and methodology, go to forbes.com/extra.