The Hex Girls is a fictional gothic rock band created by writers Rick Copp and David A. Goodman.

They accompany the rest of the group in the search for Sarah Ravencroft's medical diary, ultimately revealed to be a manual of sorcery, and later on, Thorn is the one who is able to trap her and Ben back in the book, by using it to cast a spell on them due to her biological Wiccan heritage.

Connecting the attack with their previous experiences, Dusk tries to convince the others to leave the area for their own safety, while a disagreeing Thorn and Luna want to stay and try to shoot the videoclip.

In "In Fear of the Phantom", while singing "Hex Girl" during a concert in Crystal Cove, the group are attacked by an apparent ghost, and Thorn is almost crushed to death.

After offering their assistance to the band, Daphne is captured while acting as a stand-in for Thorn singing "Earth, Wind, Fire, and Air".

They also help the gang find another clue of the Crystal Cove Mystery, by discovering and deciphering a hidden soundtrack in the Planispheric Disk.

", where-in after Daphne's makeup vlog gains internet fame, she is invited to become the band's prime consultant, which also leads the gang to another mystery in the form of the haunted guitar of Esther Moonkiler that can seemingly control people's minds.

Although it went unrealized, elements of this series were adopted into subsequent films featuring the characters, and in February 2019, Copp confirmed he had spoken further to Cartoon Network with regards developing the television series, with Hale, Wiedlin and Brooks all expressing interest in reprising their roles, with Brooks citing MeToo as "even more of a bolster for the argument that we should be trying to revive these characters".

and Scooby Apocalypse, the Hex Girls are revealed alongside Flim-Flam, Robi and Red Herring to have been controlling a gigantic Scrappy-Doo on the behest of Vincent Van Ghoul against the various incarnations of Mystery Incorporated, being upset that the Scooby Gang were allowed to have their characters evolve over time and continuities and gain more adventure and fame, and having been cast aside to be forgotten.

The Hex Girls feature in the picture book released by Hachette Livre, Scooby-Doo: Velma and the Mystery of the River Ghost.

The Hex Girls co-creator Rick Copp has cited Josie and the Pussycats as a partial inspiration in creating the characters.

[5] Author Heather Greene felt "they reflect the 'girl power' movement and could be witch-derivatives of the Spice Girls..."[10][11] Skatune Network performed a ska cover of one of their songs in 2019.

and the Witch's Ghost, the Hex Girls appeared in various types of merchandise created to cross market the film, including books like Scooby-Doo!