%%Do not list the doctor under Complete Monster, as per the cleanup thread.
* SugarWiki/AwesomeMusic: Basically any background music you hear in the short.
* IAmNotShazam: While he ''was'' renamed to the title of this short in later content -- [[HaveAGayOldTime XXX has a much different connotation today than it did in 1933]][[note]]In the 1930's, a XXX mark was a common marking for jugs of moonshine or alcohol in general, making the original name [[PunnyName a punny one]]. Today, XXX is a shorthand for highly pornographic materials, making his original name [[AccidentalInnuendo rather unfortunate sounding now.]][[/note]] -- as of this short, his name is "Dr. XXX", not "the Mad Doctor".
* MoralEventHorizon: XXX either crosses it with his plan to attach Pluto's head to a chicken's torso, or with his attempt to kill Mickey.
* NightmareFuel: '''[[NightmareFuel/TheMadDoctor Yep.]]''' This is one of Disney's most chilling shorts, right up there with ''WesternAnimation/EducationForDeath'' and ''[[WesternAnimation/{{Fantasia}} Night on Bald Mountain]]''.
* VindicatedByHistory: While the short was apparently shunned in its initial release, it has retroactively become one of the most popular WesternAnimation/MickeyMouse shorts, to where the villain not only reappeared in ''VideoGame/MickeyMania'', but was given a prominent role in both of the ''VideoGame/EpicMickey'' games.
* WhatDoYouMeanItsForKids: Doubles as this and [[WhatDoYouMeanItsNotForKids its sister trope]]. WebVideo/PhantomStrider calls it the Creepiest Mickey Mouse cartoon for damn good reasons.
--> '''Strider''': If ''WesternAnimation/{{Frozen|2013}}'' got a PG rating, how the crapsicles did ''this'' manage to get a G?!
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