Gyro Gearloose
Rosa wanted to include all of Barks' heroes and villains in the story, giving each character at least one moment when they contribute meaningfully to the plot. The Beagle Boys, Magica De Spell, and Flintheart Glomgold are the villains driving the action, but there are also moments for Gyro Gearloose (who invents the bike saucer), Gladstone Gander (whose famous luck assists the police at a critical moment), and Grandma Duck (who leads the characters to find Scrooge at the site of her father's old general store).