Nosferatu, the vampire, is voiced by James Marsters, who played the vampire Spike on TV's Buffy the Vampire Slayer (1997) and its spin-off, Angel (1999).
Series writer Francisco Angones has stated on Twitter that this episode is inspired by the episode Ducky Horror Picture Show (1987) from the original series, which like this episode also has a house filled with Halloween-themed monsters.
Scrooge in his skeleton costume at one point does the same kind of sideways step that was featured in the short The Skeleton Dance (1929).
This is the 5th episode of the DuckTales (2017) reboot to feature a custom intro and theme song. The previous 4 had been Last Christmas! (2018), The Duck Knight Returns! (2019), GlomTales! (2019) and Quack Pack! (2020).
The witch who crawls out of the well is called Witch Hazel, the name of the witch from the classic Donald Duck cartoon Trick or Treat (1952).