Top 10 Scariest Nicktoons

Looking back, Nickelodeon was kinda screwed up sometimes. These are the Top 10 Scariest Nicktoons to ever air on the channel.
The Top Ten
1 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.

I honestly think this is the true darkest Nicktoon because it was aimed at a more mature audience. You all remember that one episode that got banned because of the violent scene of Ren beating up George Liqor with an oar?

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.

I was petrified by this show when I was younger due to the career day episode. The part where Zim starts oozing and transforming really freaked me out especially since I had a fear of aliens, but now I'll watch it and LOVE it haha times change. Funny though because when I was little I loved Ren and Stimpy I was constantly singing "happy happy joy joy"

3 Are You Afraid of the Dark? Are You Afraid of the Dark? is a Canadian horror fantasy-themed anthology television series that was on YTV.
4 Fanboy and Chum Chum Fanboy & Chum Chum is an American 3D CGI animated television series created by Eric Robles for Nickelodeon. It is based on Fanboy, an animated short created by Robles for Nicktoons and Frederator Studios, which was broadcast August 14, 2009 to July 12, 2014 on Random! Cartoons. The series was first broadcast October 12, 2009 on Nickelodeon as a preview, then officially premiered November 6, 2009 after SpongeBob's Truth or Square.

YESSS! This show is scary! It's so irritating and poorly written that it's scary!

5 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 dog Spunky.
6 Danny Phantom Danny Phantom is an American animated series created by Butch Hartman for Nickelodeon. It was produced by Billionfold Studios and distributed in Canada by Nelvana, a Canadian animation company. The series follows a teenage boy who, after an accident with an unpredictable portal between the human world and the "Ghost Zone", becomes a human-ghost hybrid and takes on the task of saving his town (and the world) from subsequent ghost attacks using an evolving variety of supernatural powers. He is aided in his quest by his two best friends, and later, his older sister, who for most of the series' run are among the only people who know of his double life.
7 Aaahh!!! Real Monsters Aaahh!!! Real Monsters is an American animated television series developed by Klasky Csupo for Nickelodeon.
8 Mr. Meaty Mr. Meaty is a Canadian-American television series created by Jamie Shannon and Jason Hopley. The show centers on two lazy teenage boys named Josh Redgrove and Parker Dinkleman, who work at a fast food restaurant.
9 Dora the Explorer Dora the Explorer (2000 - 2019) is an American preschool educational animated TV series created by Chris Gifford, Valerie Walsh, and Eric Weiner in which Dora goes on adventures with her friend, a monkey named Boots.

-Dora is an explorer she is also a fictional character.
-She is talking to toddlers, who do talk to televisions.
-Justin Bieber voice broke.
-Well duh.

10 Tak and the Power of Juju Tak and the Power of Juju is an American CGI animated television series that aired for one season from August 31, 2007, to January 24, 2009. Loosely based on the 2003 video game of the same name, the show consists of two eleven-minute stories per half-hour episode. It was co-produced by THQ and Nickelodeon. The series was produced by Nick Jennings and directed, among others, by Mark Risley, Jim Schumann, and Heiko Drengenberg. It was the first CGI series to be directly overseen by Nickelodeon Animation Studio.

The animation of this show was so ugly and jerky that it actually kind of scared me, and what made everything even scarier for me was how empty and boring the whole show was.

This show's animation looks like it was done entirely by monkeys.

The Contenders
11 Avatar: The Last Airbender Avatar: The Last Airbender is an American animated television series that aired for three seasons on Nickelodeon from 2005 to 2008. Avatar: The Last Airbender is set in an Asiatic-like world in which some people are able to manipulate the classical elements by use of psychokinetic variants of Chinese martial arts, known as "bending". This show is often seen as one of the greatest cartoons of all time and is commonly thought to be an anime.

Not afraid to go dark whenever necessary.

12 Miss Spider's Sunny Patch Friends Miss Spider's Sunny Patch Friends, sometimes shortened to Sunny Patch, is a CGI-animated children's television series.
13 Making Fiends Making Fiends is an American comedy horror animated television series. Based upon a web series with the same name, the series ran from October 4, 2008 to November 1, 2008 on Nicktoons Network.

How the hell are Dora and Diego above this?

14 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.

Some episodes were noticeably scarier than others.

15 Go, Diego, Go! Go, Diego, Go! is an American animated educational interactive children's television program that originally aired on the Nickelodeon children's cable network in the United States and produced by Nickelodeon Animation Studio .
16 Rugrats Rugrats is an American animated television series created by Arlene Klasky, Gábor Csupó and Paul Germain for Nickelodeon.

Some of the show's music paired with the animation gives me the creeps from time to time.

17 CatDog CatDog is an American animated television series created by Peter Hannan for Nickelodeon. The series depicts the life of conjoined brothers, with one half being a cat and the other a dog.

Teeth for Two takes the cake and can easily pass for a Ren & Stimpy episode due to how grotesquely disturbing it was.

18 Wonder Pets Wonder Pets! is an American animated children's television series. It debuted March 3, 2006, on the Nick Jr. block of the Nickelodeon cable television network and Noggin (now Nick Jr.) on December 27, 2006.

The main characters look like a trio of reanimated animal corpses (the Guinea pig in particular) and that just does not sit right with me.

19 Max & Ruby Max & Ruby is a Canadian children's animated television series produced by Nelvana Limited based on the book series by Rosemary Wells.

The way they move as well as how they're illustrated just greatly unsettles me.

20 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 23 years, and is beginning its 13th season. The show revolves around a sea sponge called SpongeBob SquarePants and his adventures under the sea. The show is considered to be one of the best Nickelodeon and cartoon shows of all time.

Seasons 6-8 were scarier than The Black Cauldron and an infinite number of times grosser than Shrek and The Simpsons.

21 Little Bill Little Bill is an American animated children's television series produced for Nick Jr. The stories are based on Bill Cosby's Little Bill book series, set in Philadelphia, and feature Bill Jr.

Nothing scarier than having your show tied that closely to a known pedophile.

22 The Wild Thornberrys The Wild Thornberrys is an American animated television series that aired on Nickelodeon. It was rerun in the United States on Nickelodeon and occasionally Nicktoons until November 1, 2007. The show returned to The '90s Are All That for one night, and aired on March 21, 2013. The show aired on Nicktoonsters in the United Kingdom.
23 Team Umizoomi Team Umizoomi is an American computer-animated musical children's television series with an emphasis on preschool mathematical concepts, such as counting, sequences, shapes, patterns, measurements, and comparisons.
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