Bart's primary power is speed, along with abilities that are common to comics speedsters, such as creating whirlwinds, running on water, and vibrating through matter. The latter ability results in "molecular taffy" if Bart does not concentrate; he also possesses an aura, that prevents air friction while running. Bart does possess some abilities that other speedsters do not have. He has the ability to produce "scouts", Speed Force avatars that he can send through the timestream, but has used it infrequently since the death of one avatar put him in a coma during the "Our Worlds at War" storyline that crossed over among the Impulse, Superboy, and Young Justice titles. After being forced to use it during the "World Without Young Justice" crossover event, he was able and willing to use them with ease, up until he became Kid Flash. He has been shown to move faster than light as Impulse, while now he has an artificial knee which limits his speed as Kid Flash. He now can only travel close to the speed of light. Bart is resistant to the alterations in the time stream. His parents met only in post-Zero Hour continuity, but he arrived before the event. Bart has the ability to recall everything he has ever read, heard or watched (which includes speed-reading every book in the San Francisco Public Library), allowing him to spout encyclopedic information concerning the situation at hand as well as quotations from Mark Twain, of whose work he is fond. He has also displayed the ability to create powerful radio waves by rotating his arms at high speeds and using the resulting vibrations in conjunction with his teammate Static's electromagnetic abilities. After Infinite Crisis, Bart's connection to the Speed Force is more difficult to control because he now contains the Speed Force and, in essence, is the Speed Force. When he taps into the Speed Force, Bart appears to have electricity crackling around him, and the Speed Force inside him becomes so lethal that he initially wears the Flash suit while running in order to prevent it from killing him. After remembering his experiences on an alternate Earth during a fight with Griffin, he began to gain a measure of control over the Speed Force before it was released from his body just prior to his death.

Impulse

Suffering from a hyper-accelerated metabolism, Bart Allen was aging at a faster rate than that of any other human being, thus causing him to appear the age of twelve when he was chronologically only two years old. To prevent him from developing mental health problems, he was raised in a virtual reality machine which created a simulated world that kept pace with his own scale of time. When it became clear that this method was not helping, his grandmother, Iris Allen, took him back in time to the present where The Flash, Wally West, tricked Bart into a race around the world. By forcing Bart into an extreme burst of speed, Wally managed to shock his hyper metabolism back to normal. Because he had spent the majority of his childhood in a simulated world, Bart had no concept of danger and was prone to leaping before he looked. The youth proved to be more trouble than Wally could handle, and he was palmed off onto retired superhero speedster Max Mercury, who moved Bart to Manchester, Alabama. Bart originally created the Impulse codename for himself, though a retcon in Impulse #50 has Batman codenaming him such as a warning, not a compliment. Bart joined the Titans early in his career before going on to become one of the founding members (along with Robin and Superboy) of the superhero team Young Justice. For a time, Impulse became the owner of a spaceship granted to him by a rich sultan in appreciation for having helped save his castle. The team used this ship to reunite Doiby Dickles with his queen and restore the rightful rule of Myrg. Impulse stayed with Young Justice for an extensive period of time during which he developed the ability to make speed-force energy duplicates. This allowed him to be in multiple places at once. The newly acquired power proved useful until one of the duplicates was killed during the "Our Worlds at War" storyline when half the team was lost on Apokolips. Bart quit Young Justice temporarily as the death of his duplicate led him to come to terms with his own mortality. Following Max Mercury's disappearance, Bart was taken in by Jay Garrick, the first Flash, and his wife Joan. After the breakup of Young Justice, Bart joined some of his former teammates in a new line-up of the Teen Titans.