Television
Bart Allen as Impulse appears in Kids' WB's original pitch for Justice League as a junior member of the eponymous team. While Impulse, among other characters, were cut to avoid making the series feel like Super Friends, the pitch was released as a bonus on the series' first season DVD.
Bart Allen as Kid Flash appears in the Mad segment "That's What Super Friends Are For", voiced by Jason Marsden.
Bart Allen as Impulse and Kid Flash appears in Young Justice, voiced again by Jason Marsden. This version originates from a Reach-controlled future in the year 2056. Introduced in the second season as Impulse, Bart and Neutron build a time machine so that Bart can change the future, despite knowing he will not be able to return to his own time. Over the course of his mission, Bart joins the Team, becomes Jaime Reyes' best friend, is adopted by Jay and Joan Garrick, and reluctantly becomes the new Kid Flash after Wally West's death. In the third and fourth seasons, Outsiders and Phantoms, Bart joins the Outsiders and is implied to be dating El Dorado.
Bart Allen as Impulse appears in Smallville, portrayed by Kyle Gallner. This version is a self-centered thief who initially uses his powers for personal gain. After helping Clark Kent save his father Jonathan Kent, Bart considers reforming and leaves to travel the world and find others like himself and Clark. As of the episode "Justice", he has assumed the codename "Impulse" despite not choosing it himself and joins forces with Green Arrow, among other heroes, to thwart Lex Luthor and LuthorCorp's plans. From the eighth season onwards, Bart makes minor appearances as a member of the Justice League.
Bart Allen as Impulse appears in The Flash, portrayed by Jordan Fisher. This version is Barry Allen and Iris West-Allen's future son, younger brother of Nora West-Allen, and, according to showrunner Eric Wallace, is much older, funnier, charming than other incarnations, but with an edge.
