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- "The only normal one is Jack-Jack, and he's not even toilet trained!"
- —Violet about Jack-Jack.
John "Jack-Jack" Jackson Parr is the youngest child of Bob and Helen Parr, as well as the younger brother of Violet and Dash. His primary power is shape-shifting, but he also has a large number of other powers.
For the first year of his life, Jack-Jack didn't seem to exhibit any signs of powers, presumably being too immature for superpowers to manifest. But it is revealed that he has powers at the end. They are shape-shifting and setting on fire. The end of the movie is the only time he wears his suit. He is the tem
In The Incredibles, when the rest of his family was occupied with Syndrome, Jack-Jack was looked after by Kari McKeen. But her determination to have some fun ended with trouble when Jack-Jack began showing signs of his powers which she tries to control and eventually anticipates. Later, Syndrome shows up, claiming he's the replacement baby sitter. When Syndrome attempts to openly kidnap Jack-Jack and fly away, Jack-Jack uses his powers to defend himself against Syndrome, ultimately resulting in a chain reaction of events that would lead to Syndrome's demise.
Edna Mode made costumes for the entire family, including a flame-retardant jumper for Jack-Jack which, ironically enough, is needed as Jack-Jack has the ability to burst into flames and become bulletproof, though this being done before the family could determine the full extent of Jack-Jack's powers. Edna will presumably modify the costume to accommodate all of Jack-Jack's abilities.
Jack-Jack is the titular protagonist in the short film.
Later on, she says she wishes she could just forget the whole thing, and Dicker reassures her that she will, and uses a device to erase her memory.
In the sequel, a large number of Jack-Jack's other powers and abilities are more openly displayed.
Powers and abilities
Despite being the youngest member of the family, Jack-Jack has the widest array of superhuman abilities, most of which are centered around shapeshifting. Edna Mode classified Jack-Jack as a polymorph, likening his many powers to him being a baby and thus having limitless potential. Being a baby, he doesn't yet have complete control over his abilities; they are primarily activated by emotion and whim.
- Polymorphing: More than simply shapeshifting, Jack-Jack can manipulate his physical properties and molecular makeup so as to achieve a multitude of effects. So far he has displayed the following abilties:
- Shape-Shifting: He can mimic features of other people such as noses and hair. It is unknown whether he can completely transform to another person.
- Monster Form: Jack-Jack is able to transform into a monster-like creature, with red skin, long nails, and sharp teeth. In this form, Jack-Jack has a much greater muscle mass, leading to bolstered strength and manueverability.
- Self-Combustion/Flame-Form: Jack-Jack alter his physiology to set himself aflame and can, to some limited extent, extend the fire around him. As his body remains solid, it seems that it is simply his skin that combusts. His flames can be easily doused with flame retardant foam.
- Limited size alteration: Jack-Jack can increase his mass and physical size to break through small spaces or crash through walls. While in giant form he is visibly chubbier all over.
- Elemental Mimicry: Jack-Jack has shown the ability to turn himself into different elements.
- Metal mimicry: Jack-Jack is able to convert his body into heavy metal, giving him a much greater mass and density.
- Rubber mimicry: Jack-Jack can become soft and pliable with a visible sheen in order to fend off sharp attacks.
- Molecular Vibration: He can vibrate at an extremely fast rate, dislodging himself out of the arms of enemies or cause objects to melt or combust.
- Phasing: Jack-Jack, most likely by altering his molecular state, is able to phase through solid objects and even his sister's force fields. Doing so is usually accompanied by a blue electric disturbance around the place he phases through. It does seem, however, that he cannot phase through organic substances, seeing as how several people have made physical contact with him while he was phasing through a solid object.
- Superhuman Strength and Durability: Even as an infant, Jack-Jack is able to lift and throw lawn chairs with little effort and battled a raccoon without taking any visible damage. This indicates that he has some superhuman level of strength and durability.
- Wall-Crawling: He can cling and sit on ceilings and walls, including other vertical surfaces. This may or may not be tied to his levitation ability.
- Self-Duplication: Jack-Jack is able to create numerous duplicates of himself. Whether or not he is limited to a certain number of duplicates is unknown.
- Teleportation: Jack-Jack has the ability to teleport. It is unknown how far he is able to travel using this technique.
- Dimensional Travel: Jack-Jack can cross dimensional barriers and travel through to reappear elsewhere in a small radius. He can be heard and hear others while in this other-dimension.
- Laser-Vision: Jack-Jack can fire needle-thin green (blue in Jack-Jack Attack) heat-lasers from his eyes. These lasers can be reflected easily any sort of reflective surface, including a common hand mirror.
- Electrokinesis: Jack-Jack can generate electricity to some unknown extent.
- Telekinesis: Jack-Jack can bluntly levitate and manipulate relativly small objects with his mind.
- Levitation: Jack-Jack can hover several feet into the air. His maximum speed and manoeuvrability while using this power are unknown; however, he does seem to be able to control his general direction as well as launch himself into the air to a tremendous height with just a sneeze. Whether this power is self-propelled flight or an extension of his telekinetic abilities is unknown.