Scrooge McDuck is known to be the world's richest duck. He is a former employer to Launchpad McQuack and current employer to Fenton Crackshell, also known as Gizmoduck. During the course of DuckTales Scrooge was the legal guardian of his grandnephews Huey Dewey and Louie.
Despite the fact that Scrooge didn't appear on Darkwing Duck, in "Tiff of the Titans", he appeared on a billboard that Gizmoduck crashed into that said "Now Leaving Duckburg."
He appeared near the end of "The Duck Knight Returns" comic book story arc as he was given ownership of The Quackwerks Building after Darkwing defeated Taurus Bulba. Scrooge appointed Launchpad as the CEO of the Quackwerks Bulding.
In the Duck Tales/Darkwing Duck crossover story Dangerous Currency Scrooge and Darkwing teamed up with their friends to stop their enemies from trying to cover both Duckburg and St Canard with slime.
Scrooge earned his fortune by being smarter than the smarties and tougher than the toughies and making it square. He earned his first dime shining shoes when he was ten years old. Twenty years later He struck Gold in the Yukon and became a billionaire. In due time Scrooge continued to expand his fortune and became the Richest Duck in the World. Scrooge is the main character and protagonist on DuckTales. He is also the uncle of Donald Duck and the great uncle of Huey Dewey and Louie. Scrooge's friends include Launchpad McQuack, Mrs Beakly, Duckworth, Gyro Gearloose, Gizmo Duck, The Nephews, Webby Vanderquack, and Bubba the Caveduck. His Enemies include Flintheart Glomgold, Magica De Spell, The Beagle Boys, Ma Beagle, and Dijon the Thief. Scrooge originally appeared in the Donald Duck comic story Christmas on Bear Mountain in Donald Duck Four Color #178. Ever since then he has had a very prominent role in the Disney Duck Universe even before Duck Tales was created.