Mr. Holiday is an unhappy customer in the Mopatop's Shop episode "No Sea". He comes into the shop with the do it yourself beach kit he had bought earlier, and claims that something was missing. He shows Mopatop and Puppyduck the content and surely enough there's no sea, but a mountain that did not belong in there. After searching the shop for an extra sea with no luck, Ms. Trekker comes in with her do it yourself mountain kit, which had no mountain and only the sea. The two customers quickly agree to help each other out.