Bart Allen was the the product of the union between two families who had been bitter rivals for centuries. His father, Don Allen, was the son of Barry Allen, the second Flash, and his mother was Meloni Thawne, daughter of the Earthgov president and descendent of Flash villains Cobalt Blue and Professor Zoom.
Bart was born with his grandfather's speed. He had incredibly high metabolism and also aged at hyperspeed. When he was 2 years old, physically, he looked 12. President Thawne had the Dominators kill Don and his twin sister, Dawn. The Dominators kidnapped Bart, who was later captured by Earthgov for observation. The scientists of Earthgov raised him in a virtual reality environment so that he aged as swiftly mentally as he did physically. Bart was going to die of old age and Earthgov was not doing anything to fix his problem. His grandmother Iris took him away and brought him back to the 20th century, so that her nephew, Wally West, the third Flash, could show him how to control his speed.
He adopted the superheroic identity of Impulse.
After Wally helped him solve his problem and Bart helped him to defeat Kobra, Bart moved to Manchester, Alabama with Max Mercury. Wally had used his connections to supply Bart with a birth certificate, etc. Bart began the ninth grade at Manchester Junior High. He managed to make quite a few friends, chief among them Carol Bucklen. Max continued to train him in the art of superspeed, having him run obstacle courses while dodging axes and knives, solving jigsaw puzzles in mid-air, and the like. During this time, he became one of the founding members of Young Justice.Following Max's disappearance, he was taken in by Jay Garrick, the first Flash, and his wife Joan.
Following the breakup of Young Justice, Bart joined the new Teen Titans. He soon had his kneecap blown out by Deathstroke (who was at the time possessed by Jericho) and replaced with an artificial one. While recovering, Bart read every single book in the San Francisco Public Library and reinvented himself as the new Kid Flash. Even with the artificial kneecap, he could still run close to light speed. After Superboy-Prime attacked Conner Kent (Superboy) in Smallville and injured or killed many Teen Titans, Bart joined with Wally West and Jay Garrick to stop the rampage of Superboy-Prime by running him at top speed into the Speed Force. Jay reached his limit before entering the Speed Force and Wally turned into energy and vanished, leaving Bart alone with Superboy-Prime. Barry Allen, Johnny Quick and Max Mercury, all of whom had previously been absorbed into the Speed Force, appeared and aided Bart. After taking Superboy-Prime into the Speed Force, Barry told Bart that "Wally is waiting for you". After they disappeared, Jay claimed that the Speed Force was gone.
A speedster wearing Barry's costume returned in Tokyo shortly thereafter to warn of the return of Superboy-Prime. This same Flash, still wearing Barry Allen's costume, would appear in the middle of the Battle of Metropolis against the army of escaped supervillains. Superboy-Prime reveals that the person in the Flash costume is Bart Allen, 4 years older. Bart explains to the nearby Wonder Girl (who was surprised by her fellow Titan's transformation) that his grandfather's uniform was the only thing that could survive the trip back from where he had been, and that he was the only one there "who could still run". Bart then unleashed his anger against Superboy-Prime for killing Conner Kent, pummeling him at superspeed and forcing Superboy-Prime to retreat from the battle. When the crisis was over, Bart explained to Jay that he spent years in an unknown dimension where time passed quicker, causing him to grow older. Bart confirmed that the Speed Force was destroyed and he used up the residual speed locked in his body fighting in Metropolis. He gave Barry's costume to Jay and says Jay was now the fastest man alive again.
Bart shunned his super heroic past for the next year. He got a job working at Keystone Motors and began sharing an apartment with another young man named Griffin Grey. However, he was still connected to the Speed Force, but the connection threatened to kill him. S.T.A.R. Labs modified one of his grandfather's old costumes to help him control his connection. While at first he refused to don the costume, he finally gave in and became the fourth Flash. He also began a relationship with S.T.A.R. Labs employee Valerie Perez.
Bart decided to get a fresh start and moved to Los Angeles, applying for a job in forensics with their police department.
Inertia hired the Rogues to help him build a device in Los Angeles with the purpose of transferring the Speed Force from Bart to himself. Despite warnings from his grandmother, Bart confronted them. The machine was successful in removing his powers, but in doing so, it threatened to detonate with the energy of several atomic bombs. Bart sacrificed himself heroically, distracting the Rogues while Val deactivated the machine.
A funeral was held for Bart in a stadium in Keystone City. It was attended by a large number of costumed heroes, including his former Teen Titans teammates Robin, Wonder Girl, Raven and Beast Boy, and televised around the world. Eulogies were given by Jay Garrick, who revealed Bart's secret identity to the world. The funeral ended with the presentation of a video he had recorded shortly after becoming Kid Flash, to be shown in the event of his death.
Recently during Final Crisis: Legion of 3 Worlds, XS charged a lightning rod with the assistance of different versions of Garth and Ayla Ranzz in order to restore Bart to life. Bart returned as a teenager again and he received his Kid Flash costume ring from Brainiac 5.
In the recent comic The Flash: Rebirth, which features the return of Barry Allen, the Silver Age Scarlet Speedster and Bart's grandfather. At the Teen Titans Tower West, a newly returned Bart Allen views his grandfather's return with skepticism, admitting a desire for things to "go back to the way it used to be" with Wally as the primary Flash and himself as Kid Flash, as well as feeling angry that Barry is the only one to escape the Speed Force and not Max Mercury. Bart along with Conner Kent are resurrected but Death hunts them down to reclaim their lives.
Super Speed: Bart is a metahuman who can run and move his limbs at superhuman speeds. Biologically inherited ability to tap into the energy known as the Speed force. As Kid Flash, Bart was able to achieve speeds faster than Mach 10 and at speeds far greater than the speed of light if he pushed himself, but after he returned as an adult, Bart was able to achieve speeds even greater. Bart can lend speed to or borrow speed from moving objects, create objects of concentrated Speed Force energy, become intangible by vibrating his molecular mass, perform both limited time and inter-dimensional travel with the cosmic treadmill and heal personal injuries by accelerating his metabolism. In recent years, with the knowledge of the Speed Force at his disposal, Bart has managed to reach uncanny speeds, reaching as fast as the speed of thought. Bart is able to run across the surface of large bodies of water such as oceans. Bart can create wind vortexes by running in circles or rotating his arms and legs. His cruising speeds are subsonic (less than 770 mph ; the speed of sound at sea level). This is fast enough to move through most cities and around people without causing too much disruption to the population. He can also run across bodies of water and up the sides of buildings.
Speed Force Avatars: He has the ability to produce "scouts", Speed Force avatars he could send through the timestream, but has infrequently used it since the death of one put him in a coma.
Time Alteration Resistance: He has also proven resistant to alterations in the time stream, possibly due to an oddity of his origin; his parents met only in post-Zero Hour continuity, but he actually arrived before the event.
Photographic Memory: Most recently, it has been discovered that, unlike other speedsters, his photographic memory allows him to recall everything from his speed-reading. For several issues after this revelation, Bart was shown spouting encyclopedic information concerning the situation at hand.  This is inconsistent with known continuity as it had been previously established by Max Mercury that those with super-speed cannot permanently retain information if they acquired it through anything other than normal learning processes. 
Air Friction Reduction Aura: Possesses an aura that prevents air friction from affecting his body and clothes while moving.
Speed Force Conduit: Speed Force is a vaguely defined extradimensional energy force from which most superspeed-powered heroes draw their powers. The Speed Force serves as the ultimate measure of velocity in the DCU. They are often referred to in terms of barriers: Sound barrier, Light barrier, Time Barrier, Dimensional Barrier, and finally the Speed Force Barrier.
Molecular Control: Ability to control the vibration of his molecules to the degree that he could vibrate through solid objects.Bio-Fission: Shortly before the Our Worlds at War event, Bart Allen developed the ability to create clone duplicates of himself. The clones always obeyed Bart's commands, and fused back with him once a task was completed. One of these clones was killed during a Young Justice mission to Apokolips, causing great physical trauma to Bart. After that event, Bart never used the power again. (Ironically, Bart also has an evil clone)
Kid Flash possesses the strength level of a male teenager who engages in moderate regular exercise.
|Characters||Flash | Jay Garrick | Barry Allen | Wally West | Bart Allen | Iris West | Linda Park | Tornado Twins | Jesse Chambers | Max Mercury|
|Rogues||Abra Kadabra • Blacksmith • Captain Boomerang • Captain Boomerang, Jr. • Captain Cold • Cicada • Clive Yorkin • Doctor Alchemy • Double Down • Fiddler • Folded Man • Girder • Golden Glider • Gorilla Grodd • Heat Wave • Inertia • Magenta • Manfred Mota • Mirror Master 1 • Mirror Master 2 • Murmur • Pied Piper • Plunder • Professor Zoom • Rag Doll • Rainbow Raider • Razer • Rival • Rogues Gallery • Tar Pit • Thinker • Thorn • Top • Trickster 1 • Trickster 2 • Turtle • Weather Wizard • Zoom|
|Miscellanea||Flash Publication History | Keystone City | Central City | Speed Force | Flash's Costume Ring | Alternate Versions of Flash|
|Creators||Gardner Fox | Harry Lampert | Robert Kanigher | Carmine Infantino | John Broome | Mark Waid | Geoff Johns|
|Comics||Flash Comics | All-Flash | Flash Vol 1 | Flash Vol 2 | Flash: The Fastest Man Alive|
|Storylines||Flash of Two Worlds | Trial of the Flash | Rogue War | Full Throttle | Final Crisis | Rebirth|
|Other media||Flash (TV Series) • Justice League • Justice League Unlimited|
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Flash Family member
Teen Titans member
This character is or was primarily a member of the younger superhero team known as the Teen Titans, in any of its various incarnations. This template will categorize articles that include it into the "Teen Titans members" category.