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Rotter debuted in the cartoon series in the Volume 1 webisode "Idol Threat", which premiered on December 16, 2010. He is voiced by Yuri Lowenthal and Cam Clarke in the English version of the cartoon.
Volume 1[]
Webisodes[]
Cleo de Nile considers a B+ too low for the quality of the work she did for Mr. Rotter's class, but Rotter retorts that he nevers gives A's. In order to get her rightful A, Cleo uses an idol with persuading powers on him with positive results. [Source]
Volume 2[]
Webisodes[]
Rotter is manipulated by Toralei to believe the Fear Squad is preparing a prank and thus set to punish them if anything would happen, such as a stinkbomb going off, during the graduation ceremony. [Source]
The Fear Squad becomes aware of Toralei's plan and prevents the stinkbomb to be dropped. To get back at the werecats in the same swing, Ghoulia hacks their student files and gives them extra math credits. Rotter promptly sends the trio off to math camp for the duration of the entire summer. [Source]
During one of his first classes in the new school year, Rotter gets hit by a snowball thrown by either Frankie Stein or Abbey Bominable. He sends them both to Headless Headmistress Bloodgood's office. [Source]
Rotter looks over his students' test results. [Source]
TV specials[]
After Dead Languages, Frankie and Draculaura talk about how all the languages Rotter teaches sound alike, which Draculaura follows up with a mocking imitation of their teacher. Mr. Rotter notices, but assumes she's trying to replicate today's lesson and so gives her the advice to let her 'R's roll. [Source]
Volume 3[]
Webisodes[]
Mr. Rotter helps organize a class trip to Monte Scarlo. Just before departure, he hears Frankie Stein sneeze and informs her that she isn't allowed to come along if she is sick. [Source]
Frankie and the other ghouls receive detention from Mr. Rotter but aren't given a reason why. Instead, Mr. Rotter interrogates them one by one, expecting them to confess something. Cleo goes first, which she confesses that she used an idol to cut in front of everyone in the lunch line, but it cursed her pizza, bringing it to life. That wasn't the confession he was hoping for.
Then, Frankie confesses about a perfume-induced sneeze caused her to accidentally shock students in the hallway, but that wasn't what Mr. Rotter wanted to hear either. Lagoona admitted to her crime of passion due to the frogs almost being dissected, and Clawdeen admits that her brother ate her homework. Heath confesses to burning several items, and Draculaura's confession is so full of mixed information that Mr. Rotter, frustrated, dismisses her.
Finally giving in, he admits that he believes that one of them stole his glasses, but in reality, they were on his head the entire time. As he dismisses the students, he yells about someone stealing his pen, but Clawdeen points out it was still in his pocket. As Mr. Rotter sits down in the interrogation chair, the cursed pizza activates it and shocks him. [Source]
Mr. Rotter wants his class to do a presentation on which season they consider the most important. The students are placed in groups of three, with Frankie Stein, Abbey Bominable, and C.A. Cupid forming one together. They agree to go to Abbey's place to work on the presentation.
At Abbey's place, Frankie opens a bag full of old Teen Scream issues for them to get material from. Enquiring which season they should pick, Cupid votes that they do their presentation on Spring, as it is the season of revitalization and love. Abbey objects because Spring brings pollen along, to which she is allergic. She argues they should pick Winter as the most important season because it is a time to rest and reflect. Cupid counters that there wouldn't be any flowers without pollen, and Abbey argues that Winter means snow and snow means snow days. Seeing a hostile debate coming, Frankie tries to bring up Summer or Fall as the best pick, but neither Abbey nor Cupid listens. The argument escalates when Abbey freezes the bulletin board, and Cupid tries to leave angrily. When she opens the doors, the wind blows inside and knocks the board down. Frankie uses the moment to get her friends to calm down and share with them an idea she got seeing all the bulletin board's items spread over the floor.
The next class, the three do their presentation on all seasons, arguing that they are all important in their own way and to one another. Letting the message of their own presentation sink in, Cupid and Abbey reconcile. Rotter awards the three an A for their work. [Source]
Ghoulia solves a difficult equation, earning her much admiration from the Mr. Rotter and the class. [Source]
Mr. Hackington and Mr. Rotter and enlists Frankie and her friends to help pick between the two teachers.
Lagoona objects to Hackington getting the award, as she remembers his anti-phibian sentiments from when she and Gil had to take care of a gargoyle egg all too well. Cleo also objects because Hackington enjoys tormenting his students by laughing at their misery and threatening they'll fail his class. Bloodgood is shocked to hear this and notes that the award will go to Rotter then. Cleo objects to that candidate, too, stating that he is too hard on the students. Frankie adds that he accused several students of taking his glasses while they were only gone due to his own inattentiveness.
Bloodgood agrees that neither candidate is the kind she wants to hand the Creature of the Year award. Readying herself to start her selection anew with Nightmare's help, Frankie suggests to award her steadfast assistant. And so, Bloodgood announces Nightmare as the Creature of the Year during the ceremony, much to the chagrin of Rotter and Hackington. Everyone else cheers and Nightmare proudly leaves the stage, though not before happily snorting some flames towards the two disqualified teachers. [Source]
Special webisodes[]
Rotter functions as referee during the casketball game between Monster High and West Valley High. [Source]
TV specials[]
TBA [Source] [Source] [Source] [Ghouls Rule] [Scaris: City of Frights] [Source]
Volume 4[]
TV specials[]
When Robecca shares about her father for the Scare-itage assignment, Rotter is reminded that Hexiciah was one of his teachers when he studied in Monster High. When the ghouls travel back to 1814, Frankie stops by to attend Hexiciah's class - during which a teenaged, scrawny Rotter rushes in as he's late. Back then he wore a tall top hat which hid his hair that was as tall as his hat. Although in the present, he mentions he's Hexiciah's favorite student, in 1814 itself Hexiciah told him he was his least favorite. [Freaky Fusion]
Gallery[]
Webisode gallery[]
