Best Cartoon Network Villains

The Top Ten
1 Aku - Samurai Jack Aku is a fictional character and the main antagonist of Samurai Jack, an American animated television series created by Genndy Tartakovsky for Cartoon Network.

He fought the old gods and nearly ruled the Universe. After his initial defeat, he landed on Earth and proceeded to kill humans for centuries before he conquered the planet. He sent the only man who could stop him, Jack (after enslaving his people), into the future to witness what centuries of suffering looks like under his rule. He has unlimited power, strength, and knowledge, yet still gets pleasure from seeing others, especially Jack, fail. Did I mention is literally the physical manifestation of Evil? Black, takes all shapes and sizes, and he shoots laser beams from his fiery eyes. Is this even a competition?

2 Slade - Teen Titans Slade is a fictional incarnation of the character Deathstroke in the American animated series Teen Titans and is the archenemy of the Teen Titans, who wants them destroyed for his own unknown reasons, and is the main antagonist of Season 1 and Season 2; He appears as a vision in Season 3, returned only... read more

Evil. This villain is the embodiment of evil. He has alluded the Teen titans for so long I don't think they can touch him. Evil to the core without one regret. Slade deserves to be the number one Cartoon Network villIn.

The most creepiest guy ever, He's definitely not like your average cartoon villain.

" If you join me, If you swear to serve me, If you never speak to your friends again... I will allow them to live. But, if you disobey even the smallest request... I will annihilate them, robin. And I'll make you watch. "
- Slade

3 Mojo Jojo - The Powerpuff Girls Mojo Jojo is a fictional character from the American animated television series, The Powerpuff Girls, created by animator Craig McCracken for Cartoon Network.

Mojo yearns just to be evil. And as a "thorn in the City of Townsville" side he's in, Mojo is more severely thwarted, bested and embarassed by his hero counterpart. Lest we forget, his hero counterpart is a trio of preschoolers. Mojo Jojo is Craig McCracken's love letter to super villains, and we see that echoes in many of the schemes that Mojo's pulled, from gathering all the baddies to form a league of supervillains, to reverse-engineering the Powerpuff DNA, and making evil twins for the girls. It is Mojo's belief in being evil, that makes him such an awesome villain.

4 Katz - Courage the Cowardly Dog Katz is a fictional character from the Cartoon Network animated series, Courage the Cowardly Dog. He frequently appears as a recurring antagonist in the series . His first appearance was in the episode "A Night at the Katz Motel" .

S o p h I s t I c a t I o n

Seriously, this villain was absolutely awesome and badass, so sleek, a sleeker villain won't exist in cartoon network history at least.

Smooth, suave, and evil. Plus he has the best theme song by far of any villain.

Suave, psychotic, evil. What's not to love?

5 Father - Codename: Kids Next Door

Father is just ruthless. Watch his first appearance. Father is the first villain who ever defeated the KND and turned his children into animals.

This guy is mean and ruthless and after him my number 2 would be Him form the Powerpuff Girls

He is the greatest villain that the kids next door ever had to face

6 Mewtwo - Pokemon Mewtwo is a psychic-type Legendary Pokémon from Nintendo and Game Freak's Pokémon media franchise. Designed by Ken Sugimori, it made its first appearance in the games Pokémon Red and Blue. It was created by Dr. Fuji using gene splicing in an attempt to clone Mew. In the Pokémon games, it's infamously... read more
7 Him - The Powerpuff Girls

I really think he was more powerful than any of the other villains. CN did a great job on him.

How is Mojo jojo above Him? Him is awesome!

Goddammit that guy fascinates yet creeps me out. Great villan, probably the only that has creeped me out.

8 The Joker - The Batman The Joker is a fictional super villain created by Bill Finger, Bob Kane, and Jerry Robinson who first appeared in the debut issue of the comic book Batman (April 25, 1940) published by DC Comics. Credit for the Joker's creation is disputed; Kane and Robinson claimed responsibility for the Joker's design,... read more
9 X.A.N.A. - Code Lyoko

While I agree with the idea that aku is the most well known except for possibly slade, xana was a better villain than ALL of them.
His Suttle manipulations are more interesting then the typical world domination archetype.
He was also relentless and didn't let his enemies live, as he was the only one on this list who actually killed someone, in XANA's case, Franz Hopper

10 The Beast - Over the Garden Wall

"Good" villains have some sort of redeeming quality or perhaps some reasoning behind their actions.
There's a purpose behind their villainous deeds, so while the actions of the villain are... villainous, their INTENTIONS are good (at least at first).

Some classic examples:

Darth Vader = goes to the Dark Side... to try to save his wife.
Lex Luthor = is a sociopath and a psychopath... but he honestly thinks everything he does is for the greater good.
The Illusive Man = xenophobic (to an extreme) and hinders Commander Shepard... all in a bid to save humanity from extinction and ensure humanity's progress in the galaxy.

So while we know they're the bad guys, we can find a grain of heroism in who they are.
Not so with The Beast.
He is only thinking of himself, he has no grand plans, and he DOES NOT CARE how his actions affect others.

He is unfettered, unprincipled, and apathetic unless it concerns his own well-being.
The only villain to come close to this kind of evil is the Joker (the Joker at least has a "theme" to his villainy, as horrendous as it is.)

That... thing, gave me chills when I first saw it, and I don't know if I'll ever see another villain quite like The Beast for a long time.

The Contenders
11 The Lich - Adventure Time The Lich (formerly named the Lich King in the original pitch and "His Hero," and referred to as Sweet Pig Trunks in his baby form, or just Sweet P for short) is a powerful undead being and a major antagonist in the American animated series Adventure Time.

The Lich, simply put, is the twisted manifestation of the raw lack of existence that originated before nothingness itself. He is not an agent of death, but the End incarnate. He is not merciless; he simply knows not mercy. Upon examining the Lich from an non-subjective standpoint, the utter fear and hopelessness it induces on those that stand in its gruesome path forces the primary protagonists to undergo some of the most strenuous character development ever portrayed on an animated series, even leading the audience to challenge their own perception of reality. Whilst it is a shame that the Beast has not attained a higher position on this list, I firmly believe that the Lich ought to be considered to be the most vicious and unrelenting antagonist to have ever graced the face of modern television, or, at the very least, the "Best Villain" ever conceived by Cartoon Network.

12 Nergal - The Grim Adventures of Bill & Mandy Adam Nergal Darski (born Adam Michał Darski; 10 June 1977 in Gdynia), is a Polish musician and television personality, best known for being the frontman for the black/death metal band Behemoth... read more

The prototype Slenderman of Cartoon Network that can be funny, hysterical, badass, and just fun to watch! And his son, Nergal Jr., is interesting to watch as well.

Admin, we got ourselves the wrong Nergal here!

13 The Kanker Sisters - Ed, Edd n Eddy

I think that the Kanker sisters are the best Cartoon Network villain because unlike other villains, who want to take over the world and fail, they are successful when it comes to their goal, torturing the other children of the Cul De Sac

They're not villains per se but they definitely harass the Eds to the point that they can be scary.

14 Trigon - Teen Titans Trigon is a demon, a comic book character published by DC Comics. He is one of the most powerful beings in the DC Universe, having enslaved many worlds.

Voiced by Keith Szarabajka in his first appearance, after that he's voiced by Kevin Michael Richardson

15 Vilgax - Ben 10 Series Vilgax is a fictional character and one of the main antagonists of the American animated TV series and media franchise Ben 10 created by Man of Action Studios and produced by Cartoon Network Studios.
16 Elmer Fudd - Looney Tunes Elmer J. Fudd is a fictional cartoon character and one of the most famous Looney Tunes characters, and the de facto archenemy of Bugs Bunny.
17 Heather - Total Drama Island Heather was a camper and the main antagonist of Total Drama Island as a member of the Screaming Gophers. She later returned as a cast member in Total Drama Action on the Screaming Gaffers, and was one of the finalists in Total Drama World Tour representing Team Amazon.

Iconic and somewhat beguiling. One of the few true antagonists.

18 Garrett Bobby Ferguson - Regular Show

AAH! It's a Giant Bearded Face! Makes me laugh every time.

19 General Grievous - Star Wars the Clone Wars General Grievous is a fictional character and antagonist in the Star Wars franchise. He served as the Supreme Commander of the Confederacy of Independent Systems' Droid Armies during the Clone Wars. He is voiced by Matthew Wood.

I'am the leader of the most powerful droid army this galaxy has ever seen!

20 Mandark - Dexter's Laboratory Susan "Mandark" Astronomanov is the main antagonist in the American animated series Dexter's Laboratory. He is Dexter's rival and later mortal nemesis who often seeks to destroy both Dexter and his lab to prove once and for all that he is the superior genius. He is voiced by Eddie Deezen.

Namely going off of Ego Trip, but Mandark stole Dexter's idea's, banned all technology, and was blown up only leaving his brain behind. Of course there is also his laugh.

21 Van Kleiss - Generator Rex

He is the best villain in any cartoon series ever with Amon and the Beast being close second and third. His mysterious past, cunning, and the fact that he is voiced by Troy Baker make him all the more amazing. It is dissappointing more people have not seen this awesome show.

22 Rowdyruff Boys - Powerpuff Girls
23 Rob/Dr. Wreckor - the Amazing World of Gumball

Amazing he is sensational! I can't believe he is really bad and evil but it turns out he is good at the end and saves gumball

He's just awesome, the greatest character in this entire series!

This should be higher. Because I think he was one of the complex villain out there

24 Scaramouche - Samurai Jack Scaramuccia, also known as Scaramouche or Scaramouch, is a stock clown character of the Italian commedia dell'arte. The role combined characteristics of the zanni and the Capitano. In the 2017 revival of the animated series Samurai Jack, Jack encounters a robotic assassin named Scaramouche, who behaves... read more
25 Ice King - Adventure Time The Ice King is a character in the American animated television series Adventure Time. A supposedly evil wizard capable of creating and manipulating ice and snow, he is the self-proclaimed king of the Ice Kingdom, a land of ice he claimed as his own and lives in in company of many penguins.

Man this guy really wants an ice queen so obviously he was a nice man before a nuclear war the destroyed the war.

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