Born in the 30th century, Bart Allen is the grandson of Barry Allen, the second Flash, and the greatest one ever. Born with the powers and abilities of the Allen family, his metabolism was working at superspeed as well. The Allen's knew there was a serious problem when, at the age of two, he had the body of a fourteen year old. So, for the first 2 years of his life, little Bart was raised in a Virtual Reality environment. In VR, everything functioned at super-speed, so Bart could be more comfortable. Very soon, it became clear that unless his metabolism slowed down, he would die. With that, Iris Allen, Bart's grandmother, sent Bart back to the 20th century so the Flash could help him. Bart remained in the 20th century under the care of Max Mercury, the ZEN master of speed. Bart was given the superhero name Impulse. This was a very fitting name, because he always leaps before he looks and can sometimes get him in serious trouble. After spending a brief time with the New Titans, he joined and formed "Young Justice" a crime fighting team located in Rhode Island, made up of him, Superboy, and Robin.