Cancelled content

Over the years, not every idea brought up to expand Monster High made it to a product. There's about one to two years between concept and execution and much can happen in-between. Monster High itself, for instance, came close to being scrapped in 2009. An incident of significance that ties into the cancellation of approximately half the items on this page is the reboot in 2016, a result of the decreasing sales since 2013. Cancelled content, much like preliminary names, come to light through trademarks, toy listings, preparational content, and sometimes by creators talking about it.

Characters

 * Euna — Euna, a kumiho, was to debut in the Monster High/Ever After High crossover movie "Feary Tale", but as the movie was cancelled in 2015, so did the character lose out on her debut.
 * Jean Claw — The name "Jean Claw" was trademarked on February 23, 2012 and abandoned on April 15, 2013; at the same time as Ghouls Rule and a few months before anything related to  City of Frights. This means it can be both a male name (French) and a female one (English).
 * Lux Ptolemy — "Lux Ptolemy" was trademarked at the same time, May 09, 2014, as "Seth Ptolemy", and abandoned on July 06, 2015. The forename was reused for Lux de Nile on August 10, 2016, thus suggesting a male mummy identity.
 * Lycana Wilde — "Lycana Wilde" was trademarked on December 09, 2015, a few days before Silvi Timberwolf on the 21st, and abandoned on July 03, 2017. The name is a pun on "lycanthropy" and points at a female werewolf.
 * Russian Leshey — For the third wave of Monster Exchange, the inclusion of a leshey from Russia was planned. It was to have product number CHX70.
 * South African Lightning Bird — For the third wave of Monster Exchange, the inclusion of a lightning bird from South Africa was planned. It was to have product number CHX72.
 * Unicorn
 * Griffin-based Fright-Mare
 * Dragons-based Fright-Mare

Dolls

 * Gory Fangtell
 * Quill Talyntino
 * Spelldon Cauldrenello
 * Dedyet de Nile
 * Cow girl Wydowna

Merchandise

 * Operetta
 * Jinafire

Fiction

 * "Feary Tale" — Commonly known as '"The Lost Movie", "Feary Tale" was a crossover movie with Ever After High and supposed to succeed "Great Scarrier Reef" in Late 2016. It was cancelled in 2015 due to Monster High getting rebooted and Ever After High being cancelled.
 * "Shriekwrecked" — Shriekwrecked is designed to go with a story, whether told in the form of a TV special or webisode series, but none was ever produced. Instead, a three-parter stop-motion series was made, which has limited connection to the story setup as described on the back-of-the-box blurb.
 * "Garden Ghouls" — Garden Ghouls, Garden Ghouls - Wings, and Garden Ghouls - Winged Critters is designed to go with a story, whether told in the form of a TV special or webisode series, but none was ever produced. Instead, a multi-parter stop-motion series was made, which has limited connection to the story setup as described on the back-of-the-box blurb.