Villains can be many things... magnificent, horrific, philosophical... but special attention goes to the villain that makes you laugh. It might be because he's an idiot, it might be that you empathize with him, or it might be simply that his actions are so unexpected. In any case, some villains will always be funny.
Of course, funny does not always equal weak. Praise be to the villain who can cause a chuckle from his audience, right before viciously thwarting the hero's best efforts. In fact, if done correctly, the very things that make a villain Laughably Evil can make them downright disturbing once they begin crossing the Moral Event Horizon. Villain laughing at faking someone out with a gun with a "BANG!" flag coming out? Funny. Same villain doing the exact same laugh when shooting them for real a few seconds later? Creepy. A truly well written one can manage to pull off both at once. See the trope picture for an excellent example of this subtype. Just because a character is Laughably Evil, it does not disqualify them from being a Complete Monster and there are many villains that manage to be both. In these cases, what makes them funny also makes them very unsettling because of how much fun they have committing the most horrific acts possible.
Often overlaps with the Harmless Villain (Harmless Villains are inherently funny, but funny villains are not inherently harmless), Affably Evil (get the joke?), Faux Affably Evil (who are often funny), the Ineffectual Sympathetic Villain and Magnificent Bastard. And with Large Ham (playing a villain seems to be very fun). It's also a prerequisite for the Terrible Trio and the Quirky Miniboss Squad. Contrast with Monster Clown, because clowns make people cry. Interestingly, this either subverts or complements Evil Has a Bad Sense of Humor, as does Too Funny to Be Evil, a closely related sister trope. Tends to be the sort who Crosses the Line Twice. See also: Laugh with Me and Beware the Silly Ones.
Examples:
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Anime and Manga
Jason Beck from The Big O. When he's not being an egotistical fop, he's actually frighteningly competent. Too bad this is overshadowed by his over the top hubris, which pushes him firmly into the "Laughably" part of this trope.
Most of the villains of early Dragon Ball are like this. Such villains include General Blue, who is utterly hilarious in personality (and also Camp Gay) but also a very deadly opponent, and Emperor Pilaf, who has no idea what he's doing. Also Majin Buu, especially in his Fat Buu form, where his antics and are so childish, goofy, and cartoonish that you almost forget that his "games" are killing millions of people, at least until the Establishing Shot of the barren wasteland where a thriving city used to be.
The Team Rocket trio from Pokémon are this, which is the reason why they are so popular. At least until Best Wishes, when their boss gives them an actual serious assignment.
On the opposite side of the power spectrum is Kaku. The second most powerful member of Cipher Pol 9, he can transform into a giraffe. No, you didn't misread that. He can transform into an actual giraffe. Even better, he can transform into a half-man/half-giraffe. One that keeps his trademark square nose. He sincerely believes giraffes to be powerful creatures and during his fight with Zoro was prone to defending them by saying such things as "Witness the power of a giraffe!". Though that could be part-denial since everyone keeps mocking him for his powers. Oh, and he uses his nose as a weapon.
Believe it or not, out of all the animals characters can transform into so far, the giraffe appears to be one of the very best (in this form his storm kick attack was amplified like crazy, he can shorten his neck to lengthen his arms and legs, he can shoot out his head like a cannonball ...). The only one that seems to be superior is the rare phoenix.
Any animal that can kick a full-grown lion ass-over-appetite is powerful, even if their goofy build and lack of vocalizations in the range of human hearing obscures that fact.
What makes the fight even funnier is that Kaku has just eaten his Devil Fruit, and is figuring its powers out as he goes along (bear in mind that many Devil Fruit users have to spend years learning their powers; for example, flashbacks show that when Luffy ate the Gum Gum Fruit, he had to go through quite a bit of training before he could even throw a proper punch). Crowning Moment of Funny comes when he discovers the aforementioned "shorten neck to extend arms and legs" move, reasons that it works on the same principle as a pasta machine, then names the move "Pasta Machine." Also in his favor is that, despite being a government agent, he's a pretty chill guy, even giving a good-natured laugh to a post-battle quip from one of the heroes.
Mara from Ah! My Goddess. She takes time out of her busy day tormenting goddesses and attempting world conquest in order to knock a child's ice cream cone out of his hands to fulfill a snide wish by his sister. Either Kick the Dog, Crowning Moment of Awesome, or both. A truly admirable commitment to evil on any scale. For those who are wondering this happens in the first season of the TV series — if not in Mara's first episode, then in her first or second appearance after that. The scene in question actually makes her seem oddly like a Disgaea character, laughing maniacally at her "evil deed" and resulting in both of the kids kicking her in the shin simultaneously and high-tailing it, to her angry surprise.
Baki and Minki from Hell Teacher Nube. They're (nominally) evil, powerful, hugely destructive Oni, but the former adores ice cream, toys, and riding around on the little kids' train in the park, and the latter has some bizarre notions of what a good big brother/little sister relationship should be like.
Gates of Full Metal Panic: The Second Raid is so over-the-top with his Chaotic Evil antics that everything he does is completely random. Despite the sadistic violence, this makes him even funnier.
Xellos from Slayers might fit...his antics are certainly funny enough; it's just that no one issurewhat his real goals are, so calling him a 'villain' may or may not be accurate.
He's The Dragon for one of the 2 remaining demon lords. He might be a Draco in Leather Pants, but his efforts always serve his Mistress.
The various teens of Ranma ˝ could conceivably come off as this, as opposed to Comedic Sociopathy. Not one of them (except for Kasumi, and even she made mischief on some occasions in the early manga) has done something that doesn't make them look at least partially villainous, yet these same deeds (and the regulars who generally are villains) still manage to be funny because of their attempts at evil.
Almost all of the Order of the Glittering Star from Star Driver. Their everyday personas are so over the top that you can't fully take their villain sides seriously - all of them being hammy certainly helps too.
Blastmon from Digimon Xros Wars is said to be immensely powerful, but has the mind of a 5-year-old and calls the other generals by nicknames. Then he's defeated by the heroes and is reduced to a hopping head for the rest of the series. Before him, there was Etemon, an over the top rockstar monkey who's both silly, and far stronger then the last Big Bad.
Prince Eccentro of Mon Colle Knights. He's the comedian of the anime, often accompanied by a Fiery Redhead and a Cloud Cuckoo Lander as two of his followers, thus why he's so popular with fans of the show.
The aforementioned Batch and Gluko are also quite comedic. Quite often at the end of many episodes, Gluko often happily stands by and adores the scenery while Batch and Eccentro get rather embarrassing moments. They even get into rather comedic situations involving Ms. Loon.
Laharl in Makai Senki Disgaea has quite the reputation for having some rather funny moments. Also, in Episode 3, Vulcanus becomes this when he accidentally almost falls off a statue and causes it to fall, which leads to Flonne and Etna's clothing & personality swaps. When he finds Flonne sleeping with Laharl and Etna, he flips out and hits her with a This Is Unforgivable and attempts to kill all three but accidentally falls into a clam exhibit and is unable to get out for the rest of the episode. Later, while he's still trying to get out, he knocks over the same statue again, causing clothing swaps again, this time for Laharl, Etna, Flonne, and one of the Prinnies.
Barry the Chopper of Full Metal Alchemist is an unrepentant Serial Killer whose lunacy and total inability to understand normal human morality is Played for Laughs. Some people view Envy as this, though that has more to do with its terrible fighting skills and godawful fashion sense than with any real humour on its part.
Before he went all One-Winged Angel, Father had a tendency to make small, sardonic quips while horrendous battle raged all around him - usually along the lines of "Why does everybody feel the need to demolish my home?"
In a similar case to Barry, Ladd Russo from Baccano is a complete nutjob who loves killing just for the sake of killing. While it can be argued whether or not his actions are intentionallyPlayed for Laughs, it's hard not to enjoy watching the guy have so much fun.
Macine Baron from Steam Detectives. A bumbling collector and inventor of steam-powered robots with a hilariously overblown Austrian accent; willing to steal the robots if he feels like it. Certain robots he's got his eye on are more-or-less Steampunk Roombas. Upon being defeated by Goriki, he develops a deep affection towards "him".
Jan Valentine of the Valentine Brothers assassination team from Hellsing, he's very sadistic and cruel and he's also hilarious, he's very foulmouthed and loves to tell disgusting stories, he also treats the assignment like a game, and in the manga long after he's been killed he shows up from time to time to break the fourth wall.
Comic Books
The Joker thrives on this trope. One of the main goals towards portraying the character is to make his actions such that you can laugh one moment, and be horrified the next. Brilliantly brought out by many of the actors to portray him in other media, most prominently Jack Nicholson, Mark Hamill, Heath Ledger and, most recently, Brent Spiner. Whether it's electrocuting a gangster while singing showtunes, casually (and cheerfully) stalking an everyday accountant in the middle of rush-hour traffic, or doing a magic trick by making a pencil disappear, you can always find it either way with the Joker. Cesar Romero too. Maybe it's because he was so harmless or such a Large Ham, or maybe just because the show was So Bad, It's Good, but he was genuinely hilarious, if not nearly as terrifying as Ledger's Joker.
Paul Dini on the Joker: Joker's that perfect combination of schoolyard bully and class clown. The kind of sicko who will make you laugh just before he sticks the knife in and twists it.
Part of what makes the Joker so terrifying is his special mixture of being funny as all get out but a Complete Monster in many a canon. While other villains have managed to pull off this combination, the Joker is probably one of the best examples in fiction.
Herr Starr from Preacher. Every time he shows up he has a smartass line, but his Crowning Moment of Funny was when he scares some poor old lady for blocking the moving walkway by shooting wildly at her.
By this point in the series he's had to deal with "an angel, a whore, an eunuch, several dozen idiots, an unkillable mick, a one-man holocaust in a duster coat, the occasional twenty-course banquet for the mother of all fat fuckers, inbreeding, family feuds, bulimia, a retarded child (always good for a laugh), and the utter destruction of our most sacred shrine and secret retreat in the detonation of a fifty-ton bomb." Not to mention "having my head carved into a giant gleaming dong", so it's understandable that he'd be a mite testy.
Kronk from The Emperor's New Groove. Even though he's not all that much of a villain to begin with...
Yzma is so over the top in her characterization and frequent lampshading of standard Disney villain tropes that she's somewhere between this trope played straight and a parody of it. It also doesn't hurt that the character is voiced by Eartha Kitt.
In The Incredibles, Syndrome is another Disney villain who is both humorous and unnerving. Many of his lines will sound very familiar to anyone who is a comicbook fanboy or knows one, and his goofy, hammy demeanour can almost make you forget that the guy is guilty of mass murder, would knowingly kill children, and is essentially plotting to start killing hundreds of innocent people and get hero-worshipped for stopping. Just as an example:
Elastigirl? You married Elastigirl? (notices the children) And got bizzaaaay!
Hades from Disney's Hercules. Thanks to James Woods, he changed from being a stereotypical chilling villain to fast-talking, tempestuous and absolutely awesome. Easily the best part of the movie.
Guy of Gisborne: Why a spoon, cousin? Why not an axe, or... Sherriff of Nottingham: Because it's dull, you twit. It'll HURT. MORE.
Rickman's Hans Gruber from Die Hard also occasionally slips into this.
Austin Powers: Dr. Evil, Number Two, Frau Farbissina and the rest of the gang.
The Green Goblin was partially one of these in Spider-Man, mostly because the character itself is supposed to be that way, but also because he was so hammy.
In Extremities, the rapist gets all the funny lines.
Adenoid Hynkel from Charlie Chaplin's The Great Dictator. He is portrayed as infantile and crazy from power. Some consider this version of reality to be too humorous.
Ray "Bones" Barboni in Get Shorty. He can spin on a dime between being menacingly brutal, intentionally funny, and humorously incompetent. In one scene, he beats a character half to death and almost gets his balls blown off in the process. When Dennis Farina plays villains, they are usually both funny and nasty at the same time.
Tuco in The Good, the Bad and the Ugly - it's debatable whether he's actually evil, because some consider him the most sympathetic and relatable character in the film, but he's far from a good guy and is absolutely hilarious.
The villain of the CarrotTop comedy Chairman of the Board is the only particularly funny thing about it. It isn't worth it.
Duamerthrax in the Dead Gentlemen's Demon Hunter movies. The films as a whole are pretty goofy.
The Octopus in Frank Miller's The Spirit. Gems include the line "I'm gonna kill you all kinds of dead!" and accidentally making a clone that was only a head and a foot.
Pam Ferris as TheTrunchbull in Matilda. While still managing to keep the character scary, no less.
Brick Top from Snatch, a murderous gangster who feeds people to pigs and drops hilariously snarky lines.
The Ciaphas Cain series tends to draw from this trope for its humor, only instead of the source being an individual villain, it is the Darker and Edgier nature of the Warhammer40000 setting itself that provides the source.
The pigs from Animal Farm can be this, especially Squealer. A case in point would be the morning after the pigs get wasted on booze and it is mawkishly announced that Napoleon (now suffering a hangover) is dying. Then: Great news! Our dear leader is going to be making a complete recovery. Anyway, I'm off to procure some books on brewing. Oink!
Live Action TV
John Simm's Master in Doctor Who certainly qualifies as a Crosses The Line Twice villain.
All of the villains in the Adam WestBatman show fit, but the best examples are all of the one-shot villains that are unique to the show. And the Riddler, whose infamous riddles would continuously be solved by a Boy Wonder who was otherwise only good for getting kidnapped.
Spike could be quite funny, such as when he passed out in Angel's backyard and woke up when the sun made his hand catch fire. Also in the episode where he watches from a roof-top while Angel saves a girl and provides sarcastic voice-over narration.
As Victim: Oh, how can I thank you, you mysterious black-clad hunk of a night thing? As Angel: No need, little lady, your tears of gratitude are enough for me. You see I was once a badass vampire, but love, and a pesky curse defanged me, and now I'm just a biiiiiig, fluffy puppy with bad teeth. As Victim: But there must be some way I can... show my appreciation. As Angel: No! Helping those in need's my job, and working up a load of sexual tension and prancing away like a magnificent poof is truly thanks enough. As Victim: I understand. I have a nephew who's gay, so- As Angel: Say no more. Evil's still afoot. And I'm almost out of that nancy-boy hair-gel I like so much. Quickly, to the Angel-mobile! Away!
Angelus is even funny sometimes, in a sick sort of way. ("Othello and Desdemona! My favorite couple. Only Desdemona didn't love the other guy.")
The Trio start out as a mix between this and Harmless Villain. Then one of the subjects of their wacky hijinks points out that their Black Comedy Rape plan wasn't quite as funny or as hot to her, retroactively pointing out the Moral Event Horizon was crossed much earlier in the ostensibly funny episode. The Trio reacts differently: Warren goes monster, Andrew becomes an Ineffectual Sympathetic Villain, and Jonathan tries desperately to do a Heel Face Turn but is prevented by the other two.
Kamen Rider Fourze has the Cancer Zodiarts, who was the head of the high school's Rakugo club when he was recruited by the villains, and it still shows in his tendency to make puns mid-battle.
Sometimes Cancer gets into Crosses the Line Twice territory, as with his "Open Mic from Hell", where he challenges people to make him laugh or lose their souls. When the Lovable Alpha Bitch starts a long joke, he zaps her mid-sentence and says "I never liked her anyway"; when The Stoic challenges him to a funny face contest, he gives a flat "no" and zaps him.
Musical
Thenardier in the musical version of Les Misérables, quite an achievement considering how nasty he is in the book. "Master of the House" stands out as a rare moment of light relief.
Chris Jericho was one of these in WCW and in his early days in WWE. When he returned to the WWE, he tried to be a face, but has since lapsed back into this, and is much better.
Santino as a heel is this, typically throwing silly insults at his opponents. Usually he's a weak character who gets whipped on, to get the audience cheering for a big face.
Tabletop Games
Da Orkz of Warhammer 40000 are a race of Psychopathic Manchildren who fill in as the comic relief of the setting, in no small part due to crossing the line twice. Most factions in Warhammer 40k will wage genocidal war on you because they hate you with the burning fire of a thousand suns. The Orks will wage genocidal war on you because it's their idea of entertainment.
Since 40K is in many ways WarhammerIN SPACE!, the Orcs and Ogres in Warhammer Fantasy have similar traits.
In Nomine features Kobal, the Demon Prince of Dark Humor. There is also his "blood brother" Haagenti, the Demon Prince of Gluttony, who also holds purview over torture and sight gags (which many consider to be a form of torture).
Pathfinder goblins, bless their psychopathic little hearts.
Goblins in any given Magic: The Gathering setting tend to be psychopathic, destructive, homicidal, genocidal, suicidal and absolutely hilarious.
Edwin from Baldur's Gate and its sequel is sociopathic, irritable and has a massive ego but is genuinely cranky to the point of amusement and bumbling enough to be this trope. Half the laughter comes from him being sulky.
Many, if not all, of the main enemies in the Super Mario Bros series. From Bowser's kidnapping of the princess turning out to be lovesickness, Wart being the tyrant of a dream world while critically weak to vegetables (he hates the taste), to even the names of many of the stage bosses (King Caliente's Spicy Return!). Not to mention anyone who's an antagonist in an RPG or spinoff (*Chunks Awaaaay!* ) (I HAVE FURY!).
Special mention also goes to Dimentio, who often has rather quirky behaviors that count as somewhat comical, and yet commits genuinely horrific actions while cracking jokes.
However, Bowser is portrayed in a more serious manner in the main series platform games. Especially Super Mario 64 and Super Mario Galaxy.
He's a more serious threat in terms of malice in said games, but is still a comical ham of the highest order personality wise, so fits this trope to a tee.
Bowser: I'm HUUUUUUUUGE!!!!
Let's not get started on Bowser in Mario Party. Especially in 7, where he'll take a picture of the characters and make you pay for it.
Kefka, a rare example of a villain who can make you laugh, even when he's gleefully crossing the Moral Event Horizon. It also doesn't help that he's the Final Fantasy equivalent of The Joker.
Another example from that game might be the octopus Ultros. Ultros isn't really that threatening, truth be told, but he's a goldmine of hilarious one-liners.
Recurring villain Gilgamesh, a Large Ham prone to hilariously bizarre proclamations mid-battle.
Caulder of Days of Ruin fame is a fascinating example. Among other things, he releases a biological weapon and attacks civiliansfor the lulz. And he makes it funny.
Foxbat from Champions Online. He's been described as an evil version of Adam West-era Batman.
Zorbak in Adventure Quest has transcended evil. He's Ebil! Mwahahah!
Escherion, the very first Lord of Chaos in Adventure Quest Worlds, becomes this trope at the end of the Chiral Valley saga when the hero reflects his inversion spell right back at him, inverting him and causing him to suffer the Humiliation Conga of ending up casting every spell he tries to cast on him/her on himself, and eventually turn himself into a harmless frog, which is a rather funny scene, to say the least.
Hero: (after Escherion turns into a frog) Huh... I guess you inverted your powers. Every spell you try to cast on me, you actually cast on yourself. Escherion: *ribbit ribbit* Hero: I'm sure you just said something very rude in froggy.
The Lich Palawa Joko in Guild Wars: Nightfall once terrorised the entirety of the continent of Elona, whose forces were the greatest threat said continent faced until the Charr invasion many centuries later. Being unable to die or be killed, he had to be sealed away at the location of his defeat, and there he would have remained... if the plot hadn't required that you release him from his imprisonment for several very good reasons. But that's okay, all Joko wants is to reform his undead Army Of Darkness, which you've got to help him with as well. Astoundingly, he fails to be a threat for the remainder of the game, and while you're dealing with the Big Bad he's spending the rest of the time hilariously failing to get any sort of organisation from his mindless minions. What a guy. By the second game, he has gotten his act together, and how.
Mad King Thorn is generally loved by players and seen as wacky and amusing. The fact that he and his minions will happily recall the horrors they inflicted on their subjects, such as once having an entire village flayed alive, makes this somewhat inexcusable.
"Definition: Love is making a shot to the knees of a target 120 kilometres away using an Aratech sniper rifle with a tri-light scope."
GLaDoS from Portal, Wheatley and Cave Johnson in the sequel. Completely lacking in any sort of ethics, whether business or moral, but certainly quick with a quip.
Dr. Wily, from the Mega Man series. He pulls off evil plots like holding a Russian scientist's daughter hostage and spreading a robot virus, yet tends to use silly-looking robots, frequently wiggle his eyebrows, and beg for mercy upon his defeat. Every single time. The guy is a living paradox. The best example of this, is the time he stole the world's strongest robots, while wearing a rather flimsy disguise.
This is quite subject to a "Funny Aneurysm" Moment when you find out that the horrible, horrible robot war that took up most of Mega Man X's was his fault.
Hazama of BlazBlue fame is a walking Crowning Moment of Funny. He's also the kind of guy who crosses theMoral Event Horizonnine times before he's even woken up. This perception has changed over time, however. As Hazama/Terumi becomes more and more saturated and pretty much everywhere and his motives comes off extremely shallow, Broken Base was formed, some just think he stops being laughable altogether.
Naturally Dr "Eggman" Robotnik of the Sonic the Hedgehog series, and only seems to be leaning further this way as of recently. Many alternate media representations are similar (see below). What do you expect from an egg shaped scientist who makes toy-like robots?
Grand Theft Auto San Andreas. James Woods as Toreno, the paranoid government agent. Disrespecting dead women to a monologue on how all modern conspiracy theories are nowhere near the truth.
General Sarrano is an evil, manipulative, foul-mouthed bastard who delights in the suffering of others, gleefully betrays everyone around him, and is generally an all-around un-fun guy to be around. At the same time, he's a hilariously over-the-top jackass with a never-ending stream of creative invective to toss at anyone and everyone around him.
Most of the minor villains from the Pokemon Mystery Dungeon series. However, they are often phased out when the not-so-hilarious Big Bad shows up.
King Bohan and Flying Fox from Heavenly Sword. King Bohan is voiced by Andy Serkis and is funny even when being a total bastard. Flying Fox has a very shrill voice and is even hammier than Bohan.
Kaos: My head is awesome, I tell you! Fear it! Fear my GIANT FLOATING HEAD!
In the first Mother game, Hippies will try to attack Ninten with rulers. They'll also try to shout into a bullhorn that Ninten's mother was looking for him.
Cicero, from Skyrim. He's a jester who is a touch unstable, and also happens to be the Night Mother's keeper, an important position in the Dark Brotherhood.
Sho Minamimoto from The World Ends With You, if only for how bizarre he is. Even when he's planning genocide and planning to Kill the God, he's somehow hilarious. A language or math certainly helps in that.
Handsome Jack in Borderlands 2. He is evil. Absolutely, totally evil. And he is such an epic asshole that every conversation with him is side-splittingly hilarious.
Web Comics
Essentially all the villains in Sluggy Freelance except, arguably, Daedalus. Horribus, in particular, is a big example. One moment he's begging for his teddy bear (making him vice president to his empire, no less) and getting hit in the head with anvils in the middle of his Dramatic Entrance, the next he's incinerating minions and dropping a bridge on the heroine.
Darksoul in the oft-underappreciated "Oceans Unmoving" storyline is a borderline example, whose humor mostly comes after you find out the plot twist; He is actually the present day Bun Bun, while the Bun Bun shown is from the past; present day Bun Bun (Darksoul) has Laser Guided Amnesia, and his pseudo-deadpan snarking is actually him ticked off on the fact that he has no idea what's going on; everything his past self is involved in is ridiculously random ("Leaf people?"), and he knows he should know what's going on.
Even Daedalus can be funny. The only villains who weren't affably evil were Evil Aylee Clone and Kusari, who usually plays the straight man to the laughable evil around her, and even when dressed up as 'Hello Kitty' was more chilling than chuckle-worthy.
Cartman from South Park. An individual whose antics can sometimes backfire and lead to his humiliation, but he shows that he's capable of this, for example being able to team up with Cthulhu.
Saddam Hussein as well, particularly in the movie.
All the villains in Darkwing Duck, with the possible exception of Knight of Cerebus Taurus Bulba. Negaduck is a good example of a villain who pulls of both hilarious and dangerous at the same time.
Negaduck: "When I throw...THE SWITCH!!!!!"
Even Bulba has his moments:
Darkwing (taken by surprise after already doing his dramatic intro): Er...I am the terror that flaps in the night. I am...the sur-surprise in your...cereal box... Bulba: Yes, yes, I know. I heard.
Prime Evil, from Filmations Ghostbusters, was absolutely hilarious, thanks to a) the writing and b) Alan Oppenheimer's Large Ham acting.
Like everything else in Freakazoid, the villains were hilarious.
Lex Luthor in the Superman movies is funny for many reasons, but it meshes well with the character. Luthor in Superman: Brainiac Attacks is ridiculously campy, and it doesn't... work... well...
Bizarro is a creature with all the powers of the Man of Steel, and an intellect that insults egg plants by association. To be fair, he may actually be quite competent, especially in the DCAU where he is the only one to notice that something is wrong with Lex Luthor (namely that Lex and Flash are body swapped), but because he expresses himself in opposite action every time he speaks, no one gives him the time of day.
In Transformers Animated, Blitzwing by himself is funny, particularly when his "random" personality is in control ("Ooh, I wanna see him turn into a fire truck, can I, can I, can I?"), but him and Lugnut sniping at each other is hilarious.
Extra points for being a pretty competent and evil villain - one notable appearance includes tearing off Ratchet'shand (and making a reference to eating it some episodes later. Hilariously.).
Other villains have their moments, too, some more than others. Swindle, for example, is an Arms Dealer who acts like nothing so much as an overly-excited infomercial host. (In fact, his mannerisms were based partly on Ron Popeil.) And, because this show is so Merchandise Driven, you can have your own little plastic Swindle for just $10.99! But Wait, There's More!!
Dave The Barbarian's Dark Lord Chuckles, The Silly Piggy. It's in the name. For bonus points, this is how he actually announces himself.
Bebop and Rocksteady from the 1980s Teenage Mutant Ninja Turtles cartoon. Sometimes Shredder and Krang get in on it, too.
Essentially all the villains from The Venture Brothers, but the Monarch stands out.
The Joker from The Batman. From his bizarrely eclectic outfit to his equally bizarre way of fighting, the man simply cannot pass on the opportunity to do anything with a comedic twist. Naturally, some fans were not pleased.
Others found him the funniest Joker yet and quite terrifying.
Aku from Samurai Jack is so much fun to watch that you often forget he's Made of Evil, as he takes a break from hunting Jack to villainously order a pizza, subjects frightened children to his terrible storytelling, and swears revenge in a helium voice while in the form of a kangaroo rat.
The "storytelling" thing may have been an attempt to raise the next generation to revere him. It fails, obviously.
The titular protagonist of Invader Zim. Or just the Irkens in general, really. Who knew planet-scale genocide could be such a riot?
Dr. Robotnik/Eggman of the Sonic the Hedgehog games is humorous but legitimately threatening most of the time. However, in Adventures Of Sonic The Hedgehog, he is depicted as bumbling and hilarious, aided by the stellar Large Hamming of the late Long John Baldry.
Jetstorm from Beast Machines is Ax Crazy even by Transformers but his Large Ham personality and horrible sense of humour make him one of the most enjoyable villains in the entire franchise.
"This is Captain Jetstorm speaking. Please feel free to run about the tarmac and flee for you miserable little lives."
Phineas And Ferb has Dr. Heinz Doofenshmirtz. Yes, he wants to take over the entire Tri-State area, and has created everything from Killer Robots and mind-control helmets... but he's so bad at it, it's hilarious!
Of course, Compared to his alternate universe self, Doof-2 from Phineas And Ferb The Movie Across The2nd Dimension, he's a pretty decent guy. Doof-2 was willing to kill complete innocents and his alternate-self, just for the sake of it. Though he still fills this trope by, among other things, announcing their doom with a sock-puppet.
Skeletor from He Man And The Masters Of The Universe became this in the Filmation cartoon —in the original minicomics he was a fairly serious villain, but since censors were constantly breathing down Filmation's neck about what they perceived to be a horribly violent cartoon about a sword-swinging barbarian, they decided to make the scary man with a Skull for a Head less scary by playing him for laughs. Though still an evil schemer, the cartoon Skeletor was turned into a Laughing MadDeadpan Snarker who kept cracking one-liners in which he insulted the world in general and lamented how he was Surrounded by Idiots. The 2002 remake of the show turned him a little more menacing and threatening, but kept his sarcasms and general tendency to get all the best lines in the show.