The Flash is one of the Blind Bag characters in LEGO Dimensions 2: The Rise of Enoch, from the DC Comics franchise.
Barry Allen was known for being slow and easy-going. While a senior in college (with a major in organic chemistry and a minor in criminology) he helped the police apprehend a criminal at a bank robbery, he was offered a job as a police scientist in Central City. One night, during an electrical storm Barry was working on an experiment when a lightning bolt zapped a cabinet of chemicals, and the electrified chemicals bathed him. Through several events that night and the next day, including running past a taxi, catching items a waitress dropped, and saving Iris West from a bullet, Barry discovered that he had gained super speed.
He is also a member of the Justice League, which mainly consists of Batman, Green Lantern, Superman, Wonder Woman, Aquaman, Cyborg and on some occasions Nightwing, Batgirl, Huntress, Zatanna, Hawkman, Hawkgirl, Green Arrow, Black Canary, Doctor Fate, The Martian Manhunter and Shazam!.