1 Courage The Cowardly Dog
Courage the Cowardly Dog is an American animated horror comedy television series created by John R. Dilworth for Cartoon Network as part of the network's Cartoon Cartoons block.
It may be dark, But this Cartoon is still awesome!
Watching it ruined my sleep.
Return the slab
2 Invader Zim
Invader Zim is an American animated television series created by Jhonen Vasquez for Nickelodeon. The series centers on an extraterrestrial named Zim from the planet Irk, and his mission to conquer Earth and enslave the human race along with his malfunctioning robot servant GIR.
It should be number 1
This sparked my love for mystery and horror, I am grateful this show ever came to air
3 The Grim Adventures of Billy and Mandy
This is the greatest masterpiece in the pathetic history of mankind and plus Mandy is the greatest cartoon character ever written, this is should be number 1!
Its dark, I'll admit. But this show is still a part of my childhood.
Has some dark tones with humor.
4 The Marvelous Misadventures of Flapjack
The Marvelous Misadventures of Flapjack is an American animated television series created by Thurop Van Orman for Cartoon Network that premiered in North America on June 5, 2008. It stars creator Thurop Van Orman as the voice of Flapjack, a naive young boy who was raised by a whale named Bubbie and ...read more.
All I remember is that creepy cat with just a close up of black eyes like huh.
This show is a bit of a blur to me but I still remember it. Well most of the creepy parts about it
5 Gravity Falls
Gravity Falls is an American animated television series produced by Disney Television Animation that first aired on Disney Channel, and then on Disney XD from June 15, 2012 to February 15, 2016. The series follows the adventures of Dipper Pines and his twin sister Mabel in the fictional town of Gravity ...read more.
Pause at the scene where soos and Wendy think bipper is dipper his eyes disappear and start to glow.
6 Salad Fingers
I love rusty spoons
7 The Ren & Stimpy Show
The Ren & Stimpy Show, often simply referred to as Ren & Stimpy, is an American animated television series created by John Kricfalusi for Nickelodeon.
8 Adventure Time
Adventure Time is an American animated television series created by Pendleton Ward for Cartoon Network. The series follows the adventures of a boy named Finn (voiced by Jeremy Shada) and his best friend and adoptive brother Jake (voiced by John DiMaggio)—a dog with the magical power to change shape ...read more.
Mis-adventure time is so disturbing because mi-stakes is so disturbing!
9 Samurai Jack
Samurai Jack is an American action-adventure chanbara animated series created by Genndy Tartakovsky for Cartoon Network. The series premiered on August 10, 2001, with a TV movie called The Premiere Movie, before ending in its fourth season on September 25, 2004, without concluding the story. A revival ...read more.
10 Scooby-Doo! Mystery, Inc.
Scooby-Doo! Mystery Incorporated is an American animated mystery comedy-drama series; the series serves as the eleventh incarnation of the Scooby-Doo media franchise created by Hanna-Barbera, as well as the first that was not originally run on Saturday mornings.
11 Teenage Mutant Ninja Turtles (2003)
12 Teen Titans
Teen Titans is an American animated television series created by Glen Murakami, based on the DC Comics characters of the same name.
13 Ren & Stimpy Adult Party Cartoon
No not the beloved show from nick, the Spike T.V. messed up version
14 Rocko's Modern Life
Rocko's Modern Life is an American animated television series created by Joe Murray for Nickelodeon. The series centers on the surreal life of an anthropomorphic Australian-immigrant wallaby named Rocko as well as his friends: the gluttonous steer Heffer, the neurotic turtle Filburt, and Rocko's faithful ...read more.
15 Rick and Morty
Rick and Morty is an American adult animated science fiction sitcom created by Justin Roiland and Dan Harmon for Adult Swim.
16 SpongeBob SquarePants
SpongeBob SquarePants is an American animated television series created by marine biologist and animator the late Stephen Hillenburg for Nickelodeon. SpongeBob is currently the most popular show on Nickelodeon, as well as the longest running show, running for 20 years, and is beginning its 13th season. ...read more.
This show does get quite dark. The most notable one, in my opinion, is "Squid's Visit".
In seasons 1-3 and a few post-movie episodes, this got... Pretty dark.
17 Regular Show
Regular Show is an American animated television series created by J. G. Quintel for Cartoon Network that premiered on September 6, 2010. The series revolves around the lives of two friends, a blue jay named Mordecai and a raccoon named Rigby—both employed as groundskeepers at a local park.
18 Over the Garden Wall
Over the Garden Wall is an American animated television miniseries created by Patrick McHale for Cartoon Network.
This cartoon definitely deserves more love. The whole cartoon practically screams symbolism from riding a ferry, wherein you need pennies to ride, to the skeleton pumpkins saying that "You'll join us someday".
19 Hey Arnold
Hey Arnold! is an American animated television series created by Craig Bartlett that aired on Nickelodeon from October 7, 1996 to June 8, 2004. The show centers on a fourth grader named Arnold, who lives with his grandparents in an inner-city boarding house.
Very. It got into many dark things. Still my favorite show to this day.
20 Happy Tree Friends
Happy Tree Friends is an adult animated flash series created and developed by Aubrey Ankrum, Rhode Montijo, Kenn Navarro and Warren Graff for Mondo Media.
21 Hazbin Hotel
22 Cow and Chicken
Cow and Chicken was an American animated comedy television series created by David Feiss for Cartoon Network, and the third of the network's Cartoon Cartoons.
23 Batman: The Animated Series
Batman: The Animated Series is an American animated television series based on the DC Comics superhero Batman.
Why is this not number one, the show's themes are mature and dark
Involving drug dealing, loss, revenge, grief, crime, social classes, death, and the guns fire bullets. There is blood occasionally, and frequently in TNBA and some inappropriate scenes. I would definitely rate it PG 13 and one of the darkest cartoons of all time
One of the Darkest Cartoons there is.
24 Ben 10 Alien Force
25 The Loud House
The Loud House is an American animated television series created by Chris Savino for Nickelodeon. The series revolves around the chaotic suburban everyday life of a boy named Lincoln Loud and his ten sisters, to which he survives as the middle child and only son in a large family of eleven children. ...read more.
It's not only that dark when Clyde's African-American mother died, but was raised by a Caucasian dad named Howard that Clyde's mother was replaced with. Creepy.
I don't think that is what happened, clyde's dads are gay so I think they got him because they wanted a baby.