* DevelopmentHell: A LiveActionAdaptation was planned for 2012. It is most likely cancelled. Little is known about it other than it was allegedly going to be a musical. However, it seems the musical concept has been revived to be released as a CGI movie in 2015.
* FanNickname: Sixties Chick and Scary Lou for Scarah.
** Creator/YuriLowenthal as Deuce, Creator/LauraBailey as Lagoona, Debi Derryberry as Draculaura, and Katie Higgins voicing Frankie. As of Season 2, Creator/CamClarke does the voice of Heath Burns and Hoo-Dude.
** Nefera De Nile is a very bitchy version of [[Anime/CowboyBebop Faye Valentine]].
* NamesTheSame: There is another, completely unrelated movie [[Creator/AllisonPregler Obscurus Lupa]] reviewed called ''Monster High'' (that predates the franchise) which contains gory shots of people exploding and gratuitous amounts of RapeAsComedy. Pray that an unwitting parent hasn't confused the two.
** Deuce, starting with the "Why Do Ghouls Fall in Love?" special, is now voiced by newcomer Evan Smith. Smith also replaced Yuri Lowenthal as the voice of Gil. Cam Clarke filled in as Deuce's VA until Evan was cast. The vocal change also marked a [[SameCharacterButDifferent change in his personality]] that not everyone agrees with.
** Clawd was initially voiced by Yuri Lowenthal for "Fur Will Fly" for only one line; he's currently voiced by Ogie Banks.
** Heath was voiced by Yuri Lowenthal in Season 1, but Cam Clarke voices him in Season 2.
* TalkingToHimself: In Season 1, Yuri Lowenthal did the voice of every teenage male character. Season 2 brought on more male voice actors to replace Heath Burns and Clawd Wolf, but Yuri still does the voice for both Gil and Deuce.
** Slo Mo and Lagoona share a voice actor.