Bartholomew Henry "Bart" Allen II is a superhero appearing in American comic books published by DC Comics. A speedster, he first appeared under the alias Impulse and later became the second Kid Flash and the fourth Flash. Created by Mark Waid and Mike Wieringo, Bart first made a cameo in The Flash (vol. 2) #91 in 1994 before his full debut in issue #92. He has since been featured as the lead character in Impulse (1995–2002) and The Flash: The Fastest Man Alive (2006–2007). Bart also appears in the series Young Justice and Teen Titans as a member of both superhero teams. In addition to the Teen Titans and Young Justice, Bart was a core character in 10 issues of Justice League of America under the mantle of the Flash. As first conceived by writers, Bart was born in the 30th century to Meloni Thawne and Don Allen, and is part of a complex family tree of superheroes and supervillains. His father, Don, is one of the Tornado Twins and his paternal grandfather is Barry Allen, the second Flash. His paternal grandmother, Iris West, is also the adoptive aunt of the third Flash, Wally West (Bart's first cousin once removed). Additionally, Bart is the first cousin of XS, a Legionnaire and daughter of Dawn Allen. On his mother's side, he is a descendant of supervillains Professor Zoom and Cobalt Blue as well as the half-brother of Owen Mercer, the second Captain Boomerang. In addition to these relatives, he had a supervillain clone known as Inertia. For most of his superhero career, Bart was the teenage sidekick to the Wally West version of the Flash. After West's apparent death in the Infinite Crisis crossover event in 2006, Allen grew up and became the Flash. His tenure as the Flash was brief and concluded with his death in issue 13 of The Flash: The Fastest Man Alive. Allen was subsequently absent for nearly two years after his apparent death, but resurfaced—young again—as Kid Flash, in 2009's Final Crisis: Legion of 3 Worlds. During DC's The New 52 era, Bart Allen was reintroduced in Teen Titans as the alias of an amnesiac revolutionary from the future named Bar Torr; the character was later written out of comics, and his tenure erased from continuity by the subsequent DC Rebirth initiative. The original Bart Allen was brought back as part of DC Rebirth's Wonder Comics