He is the mascot of Auradon Prep and he appears during the scene when Ben was training Carlos. Dude was chasing Carlos until Carlos climbed up a tree since Carlos's mother, Cruella De Vil taught him to be cynophobic his whole life. But Ben gave Dude to Carlos and the two began to bond throughout the movie.
During the video chat with the evil parents, Cruella De Vil is surprised to see Carlos with him. She says he would make perfect earmuffs but Carlos steps up and tells his mother that they love each other.
At Ben's coronation as Maleficent attacks, Carlos sends Dude to jump on her to prove good is stronger than evil. Maleficent is appalled by Dude's dog breath.
In Descendants 2, due to Dude ingesting a truth gummie Mal had made for Carlos he is granted the ability to talk, sometimes rather bluntly.
- The dog who portrayed Dude was a female dog named Paisley.
- His first appearance outside of the Descendants franchise is in the Pup Academy episode “My Uncle is Dude”.