Scrooge McDuck is the uncle of Donald and the grand uncle of the trio Huey, Dewey, and Louie. Before the events of Kingdom Hearts, Scrooge McDuck traveled with King Mickey on a Gummi Ship trying to make a Gummi Highway and setting up a business empire. They had to part ways when the Heartless started to appear in the Realm of Light. Scrooge is the richest duck in the world, having gained his massive wealth from hard work and being "tougher than the toughies and smarter then the smarties and making it square," on the course of his many adventures in finding treasure and through mining and other business endeavors. He's a traveler by nature, journeying all over, and even between worlds, in search of treasure and ways of expanding his many businesses. According to Don Rosa's "The Life and Times of Scrooge McDuck", his estimated wealth is worth about one multiplijillion, nine impossiblitillion, seven fantasticatrillion dollars and sixteen cents and having worked so hard to acquire his wealth, Scrooge has become rather stingy and greedy; he loves his money more than anything in the world and seldom spends any more of it than he has to. Still, he values honesty and fair play, and doesn't like to be in anyone's debt. Like his nephew, Donald, he has a temper, and can appear grouchy and selfish, but is essentially a good-hearted person. He also cares for his family more than his money.