There are two references to music from the game series Castlevania. The first is when Baron Von Ghoulish's castle first appears. The second is when Mandy jumps off the toy conveyor belt.
Baron von Ghoulish is brushing his teeth in his bathroom while humming and singing, "Singin' in the Rain," the first scene he is in. This is a reference to the film A Clockwork Orange, where the lead character played by Malcolm McDowell, the voice of von Ghoulish, sings the same song twice, once in a bathroom.
When Billy takes the cookies out of the oven, he refers to them as "hot, damned, and toasty!" However, closed captioning of the episode omits the word 'damned.'
One of very few episodes not included on Warner Brothers' HBO Max streaming service when the series was added in January, 2021. As of 2022, it still hasn't been added. It was released as part of a "Cartoon Network Christmas 3" DVD collection in 2006 that has since gone out of print.