Knuckles

Knuckles made his first appearance in the episode, "Island of the Not-So-Nice". In an attempt to impress the newspaper girl Kaitie, who loves animals, Huey, Dewey, and Louie take Knuckles along without Daisy's knowledge. When Daisy sees them with her beloved pet, she is not too keen on the idea of them taking him. She warns them of how much responsibility it takes to watch Knuckles and reluctantly allows them to take care of him. As the boys go to show off Knuckles to Kaitie, they notice the iguana has gone missing. Knuckles, noticing the doughnuts in Kaitie's bag, stows away on her bike. Huey, Dewey, and Louie chase Knuckles all over town from one location to another until he winds up in a crate full of jars of peanut butter. The crate is being carried and loaded onto a small airplane by a prehistoric caveman named Mungly. The plane takes off and the boys grab onto a loose board connected to the back of the plane as it takes to the sky. However, when they get kidnapped by a mad scientist with a machine that can turn life forms back into their prehistoric ancestors, they find that they might not be able to come through on that promise to Daisy, especially when Knuckles is hit with the Retro-Ray beam and is transformed into a 50-foot dinosaur. Knuckles grows right through the roof of the small hut, roaring out mightily and his secret identity: “Jonathan smith”