Que Horrifico was the disguise of Mary Anne Gleardan, which was based on a monster from Mayan mythology.
Physical appearance[]
Que Horrifico was a short and thin boy with wild white hair and red eyes. He wore a monstrous gold and blue colored Mayan mask and a red, brown and gold patterned poncho over his mostly mummified pale-blue body. He also had long black claw-like nails.
Personality[]
Que Horrifico was a devious monster that would only appear late at night. Rather than attacking his victims directly, he would command "spookified" children into attacking his victims. he rarely spoke, speaking in a soft yet raspy voice.
Powers and abilities[]
- Spookification: Que Horrifico appears late at night and plays a song of mystery on the pan flute, a woodwind instrument made with multiple bound tubes. Children who hear the music become "Terriblados", which is colloquially translated as, "Spookified." The affected children become gremlin-like monsters with gray skin, white messy hair, sharp teeth and glowing yellow eyes. In reality, Gleardan bribed the children to dress up as monsters to pretend to be "spookified" so they could take over the town.
- Disappearance: Que Horrifico could disappear in a burst of dust. This ability is not adequately explained, but could just be assumed Mary Anne used a smoke bomb and ran away before the smoke disappeared.
History[]
Early life[]
This disguise was based on Que Horrifico, a creature in Mayan mythology. Being a normal man during the day, he would transform into a monster at night after sundown. he would roam villages, playing his music on his pan flute, transforming nearby children into monsters called "Terriblados".
Scooby-Doo! Mystery Incorporated[]
Season one[]
Young prodigy Mary Anne Gleardan requested to be appointed into Crystal Cove's town council, but was rejected due to her young age. She learned of the Que Horrifico legend in a high school honours class, so she disguised herself as Que Horrifico to scare adults away from Crystal Cove and take over the town. She created her costume using assets from her school's theatre department and bribed children to disguise themselves as "spookified" monsters.
Que Horrifico was first seen in the neighbourhood where Mystery Inc. member Daphne Blake was babysitting. he then attacked a second neighbourhood, which prompted terrified parents to move away, leaving their children behind.

Mary Anne Gleardan unmasked.
Mystery Inc. created a trap where they lured the monster to attack an unoccupied home. They succeeded after the "spookified" children abandoned the plan after seeing an episode of sitcom Broccoli Head on television. After her identity was revealed, Gleardan was arrested by Sheriff Bronson Stone despite being a minor due to the amount of money the town had wasted on Que Horrifico-merchandise.

Concept art of both Que Horrifico and Mary-Anne Gleardan
Appearances[]
- Scooby-Doo! Mystery Incorporated
- 105. The Song of Mystery
- Scooby-Doo! A Science of Sound Mystery: A Song for Zombies
Quotes[]
Que Horrifico: What are you doing? Attack them! |
Que Horrifico: You fools! You're ruining everything! |

Notes/trivia[]
- "Qué horrífico," when translated from Spanish, translates to "how horrific."
- Que Horrifico is a villain in Cartoon Network.com's game Scooby-Doo! Mystery Incorporated: Crystal Cove Online.
- This legend is most likely based off the Pied Piper of Hamelin, a character from a German mythology who would entrance children by playing a magic pipe and lure them away from their homes.