Graveyard Ghouls

The Graveyard Ghouls are zombie-like monsters from the eleventh Goosebumps Series 2000 book, Attack of the Graveyard Ghouls.

History
When Spencer Kassimir knocks over the headstone, the zombie-like ghoulish figure of Oswald was back from the dead where he ends up pushing Spencer out of his body and possesses it, leaving Spencer in the spirit world with other souls who tell Spencer about how evil Oswald and Martin were when they were living. Spencer tries to get back home and confront Oswald by possessing several bodies. After failing to convince him, Spencer seeks Audra's help. But there, it is revealed that Audra's body was already possessed by Martin when they first visited the grave. After finding Audra, she and Spencer try to stop the two ghoulish brothers. After doing a special ghoul dance, Martin and Oswald die and Audra and Spencer get their bodies back.

Other appearances
The Graveyard Ghouls make an appearance in the 2015 Goosebumps film.

Trivia

 * Some of the actors for the Graveyard Ghouls played zombies on AMC's The Walking Dead.