- Adaptation Displacement: Villainous originally came from a series of web shorts made in 2012 for Ituriel's website That Place To Hang Out. It doesn't help that almost all of the artwork and shorts were removed off of the website, and the original shorts have been privatized on its main YouTube page, likely for legal reasons—as Cartoon Network now owns the rights to the show.
- Awesome Ego: Black Hat thinks that he is the greatest villain ever. It's hard to blame him. His muscular version is a great example, thanks to his hammy personality.
- Awesome Music: The music from the teaser trailer gives us a catchy theme set to a dark jazz number that sings about Black Hat and how evil and frightening he is:"Gather around my children,
For I have a tale to tell
Have you heard the lore
Of the most peculiar man of all
He's tall and wears a black hat
And within the dark he strikes, Oh my!
No hero dares to stop him
They run in terror and fright
If you've been having trouble with any hero or are just a parent with a terrible child,
call 1-800-BLACK HAT
But you've been warned
Beware of-" [record scratch]
- Broken Base: For a number of people this series is an Author's Saving Throw for Cartoon Network, usually people who are tired of the increasingly family friendly approach the channel has taken recently, and if dark they usually accuse it for being pretentious or some combination of it all, notably this show shares a friendly fandom with some of the darkest shows in the channel's history, on the other hand many can't stand the Darkness-Induced Audience Apathy, due to the focus characters being unrepentant villains, and the ARG and worldbuilding implies that the world is in a pretty bad state. Adding to that is how Black Hat is portrayed as an invincible evil who is implied to be the Big Bad of the entire CN universe. The series' small cameos/Easter eggs implying the defeat of several well-known Cartoon Network heroes has also earned the ire of fans of those shows who don't appreciate seeing their villains being downgraded to pander to Black Hat's status of a greater all powerful villain who can't be stopped. Not to mention Black Hat is fully aware of this and is totally smug about it.
- Crazy Awesome: Demencia is an absolutely off the wall, and yet, she's so capable of going toe-to-toe with superheroes that Black Hat Organization has a service where a villain can temporarily hire her to dispatch their nemisis, and she's so good at it that people often request to keep her permanently.
- Crossover Ship:
- Cult Classic: For a series of mostly minute long shorts that unceremoniously debuted one afternoon, the first phase of Villainous content quickly gained the show popularity that rivaled much of Cartoon Network's on-air programming, both in Latin America and the United States.
- Ensemble Dark Horse:
- The muscular Black Hat is the most popular out of Black Hat's clones, because of his voice and personality.
- Another alternate version of Black Hat became popular very quickly: The heroic Black Hat, who appeared for two seconds as a Fandom Nod to a popular Alternate Universe Fic note . Some fans like to ship him with Black Hat, despite him only existing in Demencia's imagination. There's a whole AU about him and his respective organization too.
- Penumbra has gained a considerable following from her appearance in the pilot, mostly due to her being a Perky Goth and actually being quite nice. Fans like her so much that she has a real life Instagram page. Posts made on said Character Blog, which showcase her life following the events of the pilot, as well delving into her backstory and foreshadowing future potential plot-lines in the full show, has led her to arguably becoming the most popular character in the show, outside of the main cast.
- In regards to villains introduced in the shorts, Metauro and Mawrasite have gotten the most play in the fandom. The former for his tragic backstory, and the latter for her interesting design and character.
- Epileptic Trees: There is a popular fan theory that Demencia used to be a normal girl named Amelia ("Amy" for short) who got kidnapped and mutated by Black Hat and suffers from Stockholm Syndrome. The theory stems from some notes being shown in the background sometimes, some of which are signed as "Test Subject: Amelia" or "Love me BH, <3 Amy".
- Estrogen Brigade: Dr. Flug and Black Hat are insanely popular among gals, if fan-made content (and Demencia, in the case of Black Hat) is anything to go by. ESPECIALLY the Muscular Black Hat.
- Evil Is Cool: Black Hat, hardcore. Demencia as well, and Flug when he shows his sadistic streak.
- Evil Is Sexy:
- The charismatic and sharply dressed Black Hat, at least from Demencia's perspective, as well as many fans. The one time Black Hat is shown as "good" (via her impression of him when under the effects of the Dapura Repulsa flower) she reacts with utter disgust.
- Demencia could also both qualify for male viewers.
- Fandom-Specific Plot: It is beyond common to see works that present Black Hat having ties or deals with villains beyond Cartoon Network shows.
- Fanfic Fuel: The second batch of shorts shows Black Hat having ties to an entire multiverse of Cartoon Network villains, many of whom he has personally worked with. That's enough to keep fics going for ages! His report on the The Delightful Children From Down the Lane, especially so, as it ends with the Kids Next Door being made aware of Black Hat's existence and Flug telling them to back off lest they face the organization's wrath.
- Most fans depict Black Hat as being some sort of demon or a Eldritch Abomination. The show doesn't do much to discredit that idea.
- Based on how Flug reacts to Peridot's HeelFace Turn, many fans have gone with the idea that the organization utterly hates reformed villains. It is safe to assume few things infuriate Black Hat quite like a villain going good.
- Friendly Fandoms: The fandom seems to be quite an overlap with the Wander over Yonder fandom, with a lot of crossover art being drawn (a lot of which happens to include a certain EVIL SANDWICH.)
- Gotta Ship 'Em All: Black Hat/Dr. Flug and Black Hat/Demencia are both incredibly popular ships, but fans have also been known to shake things up by pairing Dr. Flug and Demencia or just shipping all three together.
- Idiosyncratic Ship Naming:
- Jerkass Woobie: Dr. Flug, who takes the majority of the abuse in the show and generally gets no respect from the nefarious Black Hat but it's downplayed somewhat when it's made clear that Flug isn't just an unfortunate Butt-Monkey, but also a genuine supervillain and a willing accomplice in Black Hat's evil schemes.
- Just Here for Godzilla: Quite a few people watch the show just because Markiplier voices 5.0.5. and the Muscular Black Hat.
- Memetic Mutation:
- Once the Cartoon Network shorts hit the web, the animation community immediately gathered together to get in on the action.
- The record player in Black Hat's office.note
- Older Than They Think: Despite being marketed as such, this isn't the first animated show to come from CN Mexico. Rather, it was actually Santos Contra Los Clones, which followed a similar format as being a miniseries with minute-long installments.
- Self-Fanservice: A lot of fan-artists like portraying Dr. Flug as Beautiful All Along underneath his bag.
- Testosterone Brigade: On the opposite end from the Estrogen Brigade, Demencia seems dementedly popular among male viewers.
- Unexpected Character: While some fans may have expected the The Powerpuff Girls girls to get an orientation video, almost no one expected it to be their original version over the reboot
- Due to said reboot, the Powerpuff Girls at least fit the theme of the other orientation videos by still being relevant and being a modern show. Because of this, no one expected the Kids Next Door to get an orientation video. Even in the video, since most of the videos were only of the villains in question and the main heroes, was anyone expecting to see Numbuh 362 during the scene when the Kids Next Door learn about the Black Hat organization?
- What an Idiot!: In one short, Black Hat and Flug demonstrate a security system that's meant to guarantee keeping people out with its multiple weapons.
You'd Expect: Flug would make sure to implement some sort of off function so that he and Black Hat can safely enter and exit the house.
Instead: He never considers an off function and is forced to endure the pain of the system after turning it on while he and Black Hat are both outside.
- What Do You Mean, It's for Kids?: It's a Cartoon Network show about a supervillain team loaded with tons of Black Comedy and Comedic Sociopathy.
- The Woobie: 5.0.5. He's one of the sweetest creatures you'll ever meet, but unfortunately, he lives with the most evil creature in the world/universe, who regularly abuses and belittles him because of what he is.
YMMV / Villainous