In Treasure in the Clouds, Wizzy and Wigg set out to find a Golden Cloud for Multo as a surprise present, after Multo tells them a story about it. Dark Truder overhears them and unaware it is just a story, plots to find the Golden Cloud himself so he will be rich. Wizzy and Wigg hike up Mount Zula, meeting many types of clouds along the way. When they reach the top, they actually see a golden cloud that Dark Truder attempts to grab, but it turns out to be the Zula Patrol ship hidden in a cloud of smoke. Dark Truder is foiled by his own greed, but Wizzy and Wigg discover that sometimes the key to happiness is making others happy.