1 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.
Okay, he's a really creepy guy. I mean, just look at him. Also, he's a somewhat atypical villain who wants to murder a few people or take over some territory. The Lich wants to destroy any form of life, nothing more, nothing less. A master manipulator, extremely powerful, dark, scary, sadistic, almost unstoppable, and purely evil. Easily one of the best modern villains.
Unlike other villains who either want to take over the world or the universe, The Lich wants to end everything created.
He has no soul. His only purpose in life is to end all life on Earth. What's more evil than that?
2 Frieza - Dragon Ball Z
Freeza (Pronounced "Frieza" in the Funimation dub) is fictional character in the Dragon Ball series by Akira Toriyama as the primary antagonist of the Freeza Saga. He is a galactic tyrant who governs the Planet Trade Organization and is feared by the universe for his sadistic and brutal nature. He is the series's most personal and significant antagonist, being responsible for many of the series' events,... read more
He spearheaded an entire genocide to gain immortality, tortured Vegeta to death, killed Krillin right in front of Goku, and then attempted to kill Gohan right in front of Goku. In the Resurrection 'F' movie, he executes his entire army after they are defeated.
Frieza is the most evil character ever! Twice as evil as the evilest! He would kill a child with no mercy!
3 Bill Cipher - Gravity Falls
Bill Cipher is a triangular dream demon formerly existent only in the mindscape who wished to gain access to the real world. He has been running amok in Gravity Falls, Oregon since being summoned by Stanford Pines over thirty years ago. He is known for his mysterious demeanor and sadistic humor. He is the main antagonist of Gravity Falls, although he doesn't play a central role in the series until... read more
He is terrifying, yet lovable. If you were a random person who knew nothing about this cute-looking character, he is a definite wolf in sheep's clothing. From the first episode he appears in, Dreamscapers, he will charm you with his humor and basic awesomeness. But as the show progresses, the more drawn you become. This one character casts the same spell as FNAF. Once you enter the fandom, you can't get out.
Now, you may be sitting here reading or skipping past this, thinking, Why are these people so terrified of a Dorito dollar bill chip-like creature?! Watch Dreamscapers, Sock Opera, Mabel and Dipper VS the Future, and then, you might be ready for the three episodes of Weirdmageddon, which come right after Mabel and Dipper VS the Future. Although, you probably won't understand the plot, at least you will get a good idea of how Bill Cipher is truly, a character we hate to love. The mere idea of him getting into my head sends shivers down my spine.
4 Sosuke Aizen - Bleach
Sosuke Aizen is a fictional character in the Bleach manga series and its adaptations created by Tite Kubo.
5 HIM - The Powerpuff Girls
Is it weird that this guy's my favorite character?
Really creepy, man.
6 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.
It took Samurai Jack 50 years to defeat him. He was not a fantastic fighter but a brilliant strategist when he made Jack lose his sword forever.
7 Vilgax - Ben 10
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.
The look is a Cthulhu rip-off.
8 Cell - Dragon Ball Z
Cell is a fictional character in the Dragon Ball series by Akira Toriyama. He is the main antagonist of the Android Saga, being an android/artificial life form from the future, whose goal is to become "perfect" via absorbing Androids 17 and 18 and becoming the strongest fighter in the universe.
Stole the powers of Androids 17 and 18 and can launch Goku's Kamehameha. Needs to be number 1 on this list.
9 Father - Codename: Kids Next Door
10 Vlad Plasmius - Danny Phantom
Vladimir "Vlad" Masters (also known as Vlad Plasmius) is the main antagonist from the American animated series Danny Phantom created by Butch Hartman for Nickelodeon. He is Danny's arch-enemy and Jack Fenton's former best friend and Maddie's former lover. He is voiced by Martin Mull.
And the reason of how the most dangerous psychopath villain of all in Danny Phantom, Dark Danny. (Danny's future evil self)
11 Fire Lord Ozai - Avatar: The Last Airbender
12 The Joker - Batman: The Animated Series
13 Claude Frollo - The Hunchback of Notre Dame
14 Scar - The Lion King
Scar is the main antagonist of Disney's 1994 animated feature film, The Lion King. He was the second son of Ahadi and Uru — who were, at one time, King and Queen of the Pride Lands — the younger brother of Mufasa, and the uncle of Simba.
15 Cruella de Ville - 101 Dalmatians
Cruella de Vil is a fictional character who appeared in Dodie Smith's 1956 novel The Hundred and One Dalmatians, Disney's animated film adaptations 101 Dalmatians and 101 Dalmatians II: Patch's London Adventure, and Disney's live-action film adaptations 101 Dalmatians and 102 Dalmatians as the main antagonist.
16 Shredder - Teenage Mutant Ninja Turtles
Oroku "The Shredder" Saki is a fictional character in the Teenage Mutant Ninja Turtles comics and all of its related media.
17 Plankton - SpongeBob SquarePants
Sheldon James Plankton, or simply Plankton, is a character in the Nickelodeon animated television series SpongeBob SquarePants.
18 Jeffery Fecalman - Family Guy
19 Dr. Heinz Doofenshmirtz - Phineas and Ferb
Dr. Heinz Doofenshmirtz is a fictional character and the main antagonist from the animated television show Phineas and Ferb. He was created by Dan Povenmire and Jeff "Swampy" Marsh, and is voiced by Povenmire.
20 Princess Bubblegum - Adventure Time
Princess Bonnibel Bubblegum of the Candy Kingdom is a fictional character in the Adventure Time animated series on the Cartoon Network.
21 King Cold - Dragon Ball Z
22 Candace - Phineas and Ferb
Candace Gertrude Flynn is a main character of the Disney Channel animated television series Phineas and Ferb, voiced by Ashley Tisdale and created and designed by Dan Povenmire.
23 Mrs. Robinson - The Amazing World of Gumball
Should be way higher.
24 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 as a loyal and devoted minion of the mighty demon Trigon in Season 4, he also makes a small appearance in the final episode of Season 5 "Things Change." He also appears as the main antagonist of Teen Titans Go to the Movies. He was voiced by Ron Perlman and Will Arnett. He is also the arch-nemesis of Robin.
25 Sharptooth - The Land Before Time