Psychopathic Manchildren in animated movies.
- Batman Beyond: Return of the Joker: Deconstructed. Terry exploits Joker's Fatal Flaw by lacing his Boring Insult towards the clown and taunting his childish obsession with Batman. It's so effective Joker explodes in anger, leaving only the unhinged monster from that point on. Despite his cruel mockery of others, Joker Can't Take Criticism when others poke fun at him. For a comedian, the only thing worse than a Tough Room with a silent audience is The Heckler.
- In fact, it's an Ironic Echo to Joker's mockery of the original Batman after finding out his identity, mocking him for being "a little boy in a play suit crying for mommy and daddy," with the insult being thrown right back at his face.
- To highlight his immaturity, Joker blows the Bronx cheer at Batman after admitting he was not a Worthy Opponent.
- Gaston's role in Beauty and the Beast consists of him throwing a very violent temper tantrum when he doesn't get what he wants.
- Cinderella: The Wicked Stepmother, Lady Tremaine strongly believes in maintaining grace and self-control, but she is also very selfish, hates to work, refuses to empathize with others, gets upset when things don’t go her way, is never satisfied with what she has, and will resort to very petty means to get her way. Overall she can be essentially a spoiled little brat in an old woman’s body.
- Coraline has the Other Mother. She's cunning and crafty, and convincingly presents herself as a loving mother (at first), but when Coraline starts resisting her attempts to "keep" her, she starts throwing tantrums.
- Despicable Me 3: Gru's new nemesis Balthazar Bratt is a Former Child Star who believes that he is the character he used to play.
- Kadaj and his group from Final Fantasy VII: Advent Children, a group of superpowered teens created from Sephiroth's refusing-to-be-dead essence. Kadaj can go from vicious and sadistic to heartbreakingly childlike and back again in the span of around fifteen minutes. His older 'brother' Loz is less psychotic, but more childlike. Yazoo doesn't get much screentime, but he clearly laughs in childish excitement in the extended version as he steers his motorcycle off an exploding bridge to attack an airborne helicopter.
- Guillermo del Toro's Pinocchio: Benito Mussolini is depicted this way in the film. In all of his brief appearance, he's portrayed as an overgrown child who likes to watch puppet shows and, after finding himself the target of mockery, violently overreacts by having Pinocchio shot and the entire circus burnt down. He's even portrayed as having the disproportionately large head and small limbs of an oversize infant or toddler.
- Hercules: Hades, the Lord of the Underworld, is quite the Sore Loser when things don't go his way. He literally burns with anger and throws bratty temper tantrums with his tormented minions being the usual toys to blow off steam. His Arch-Enemy Hercules is the root of all of his misery. Even mentioning Herc's name or his merchandise will set him off. When he loses it completely, his whole head and arms become fountains of fire.
- Home (2015): Smek is the leader of an entire planet, who throws himself on the ground and cries out loud like a toddler when he doesn't get his way.
- Judge Claude Frollo from The Hunchback of Notre Dame (Disney). He's competent and cunning as well as seeming cool-headed at first, but as the story goes on, it becomes clear Frollo is essentially a selfish, heartless, spoiled toddler in an adult's body, being incredibly petulant and having fits of rage whenever things don't go out his way, doing things on a whim, treating his own minions horribly in a manner not unlike a child breaking his toys, and what especially sells the deal is his Villainous Breakdown, which is essentially him throwing a massive, deranged, long-drawn-out and violent high-octane temper tantrum in the form of trying to burn down Paris and attempting to slaughter all Roma people out of spite. Further adding to his immaturity are his delusions of godhood, alongside his extreme pettiness, refusal to acknowledge the error of his ways and his entitlement to have Esmeralda. Nonetheless, it's the scarily realistic portrayal of these qualities, as well as his zealotry and abuse of power, that make him such a shockingly dark and frightening villain.
- The Incredibles: Syndrome balances a genius-level talent for inventing technology with an incredibly childish personality; he's immature, excitable, petulant, irresponsible, prone to mood swings, obsessed with gadgets and "toys", and spiteful. His motivation also stems from an admittedly wounding and hurtful, but still relatively minor slight, he suffered when he was a child, which he refuses to move on from as he's a textbook example of a malignant narcissist.
- The LEGO Movie: President/Lord Business is a Faux Affably Evil Villain with Good Publicity and obviously quite intelligent and competent, but his motivations are ultimately very childish — to have total control over a perfectly ordered world. At the end of the movie, he even rants to Emmett that "No one ever told me I was special!" All of this has a very good reason, as the entire setting was created by a child, and Lord Business is representative of said child's father.
- The LEGO Movie 2: The Second Part: Rex Dangervest is presented as a selfish child attempting to store away the LEGO community out of spite. This is again a representation of how Finn is being childish by destroying Bianca's playset out of spite rather than reasoning with her to not play with his stuff.
- The Lion King (1994):
- Scar. Best exemplified when he says "I'm king, I can do whatever I want!", since that's the exact same attitude Simba himself had when he was a cub. Simba grew out of that mindset, but Scar never did; he paid for it eventually.
- Ed the hyena comes off as this to a mild extent, though he is mentally challenged and doesn't speak like the others.
- The Bowler Hat Guy from Meet the Robinsons qualifies, seeing that he's trying to ruin Lewis' life all because he blames him for missing a pitch at a ball game.
- Megamind: Hal Stewart starts off as a typical Manchild, but once he becomes Titan, he throws a long-drawn-out temper tantrum by destroying Metro City and trying to murder Roxanne because she didn't return his feelings.Hal: Hey, Metro-losers. This is Metro Tower. They say it's supposed to be a symbol of our city's strength. But for me, it's a reminder of the day this woman ferociously ripped out my heart! And I hate reminders!
- The Storm King in My Little Pony: The Movie (2017). His demeanor frequently switches from cold and threatening to goofy and over-the-top, but that only makes him even more unpredictable and dangerous. For example, in his conversation with Tempest Shadow, he threatens her — in a stern and serious voice — that her horn is not the only thing that's going to be broken if she fails in her mission. A mere moment later, he flashes a silly smile and goes into incoherent babble. After he drains the magic of all four alicorn princesses via Staff of Sacanas, one of the first things he does with all that godlike power is playing with the sun and the moon. Next thing he does is conjuring a huge tornado which ends up sweeping away most of his remaining soldiers and trying to kill Tempest via lightning bolts, with a Slasher Smile on his face.
- Goblin Prince Froglip from The Princess and the Goblin, who relishes "doing nasty things" to humans and is at one point seen sucking his thumb as he goes to sleep.
- The Rescuers:
- Both times that are called in to save children, they actually have to save them from child-minded adults. Madame Medusa, in particular, embodies all the negative aspects of thinking like a child and none of the positive ones, as she has a habit of throwing hysterical fits whenever someone tells anything else other than what she wants to hear. Ironically she hides the Devil's Eye (an adult's desire) inside Penny's teddy bear (a child's keepsake) and therefore doesn't plan to return it and then acts about keeping and losing it in a much more immature way than Penny whose teddy bear has actual emotional value to her.
- McLeach, by contrast is much more articulate and capable of taking care of whatever obstacles may arise and it is only in his cruelty that the child inside him comes out: when he childishly mocks Cody and pretended that he was afraid of the authorities (which only Joanna found funny). His comments about passing third grade definitely leave the impression that there were things other than academic skill that were left behind...
- Prince John from Robin Hood (1973) is a petulant, temperamental, selfish, impulsive crybaby who sucks his thumb and cries for his mommy. The real Prince John (later King John) is often depicted this way in other works, but whether he truly was is impossible to say.
- Shrek:
- Prince Charming in Shrek 2 and Shrek the Third. A huge Momma's Boy who relied on said Momma for everything before her death in the previous movie, his entire Evil Plan is motivated by a mixture of revenge and pleasing her. Once he's taken over the throne, his first act is to put on a stage show about himself and how cool he is. Case in point, his last words: "Mommy?".
- Big Jack Horner in Puss in Boots: The Last Wish was a Spoiled Brat who received everything a person could ever want, but became a Card-Carrying Villain with an Inferiority Superiority Complex due to not having the fame and recognition of the magical fairytale creatures he lived alongside. His Evil Plan is to become an Evil Sorcerer with "all the magic in the world" simply so nobody else would have any. To drive the point home, he even looks like an oversized infant.
- The Super Mario Bros. Movie:
- Bowser is as ornery as he's ever been, but his plan hinges on a childish crush on Princess Peach and him being convinced that she'll like him because he's powerful and cool. He almost never takes any criticism without flipping out, usually violently. When he isn't given what he wants, he'll either throw a massive tantrum, destroy what's standing between him and what he wants, or both. Heck, his whole antagonism with Mario only ever starts because he thinks he's stealing Peach from him.
- A different side of this trope that applies to him is briefly explored during the film's climax: when the Mario Bros. harness the power of the Super Star and begin not only No-Selling all of his attacks but also genuinely and severely harming him, he can be seen with a very shocked and panicked expression on his face during most of his very one-sided fight with them, suggesting him to be a bully who has likely hardly, if ever, experienced genuine opposition and therefore has very little idea of how to react to such.
- Wreck-It Ralph: Turbo. His façade of King Candy is that of a flamboyant and ditzy monarch who would rather make puns than be an effective ruler, but in reality, he's a horrifically childish, immature brat with a murderous attitude and a huge hunger for attention who's willing to destroy a game because of his pettiness, and the "psychopathic" comes through once he goes One-Winged Angel, all because he's "Turbo-tastic!".
