Booster Gold is one of the non-playable characters in LEGO Dimensions 2: The Rise of Enoch, from the DC Comics franchise.
Background
Michael Jon Carter was born poor in 25th century Gotham City. He and twin sister Michelle never knew their father because he left after gambling away all their money. Michael was a gifted athlete, attending Gotham University on a football scholarship. At Gotham U., Michael was a star quarterback until his father reentered his life and convinced him to deliberately lose games for gambling purposes. He was exposed, disgraced and expelled. Later he was able to secure a job as a night watchman at the Metropolis Space Museum, where he studied displays about superheroes and villains from the past, particularly the 20th century.
With the help of a security robot named Skeets, Michael stole devices from the museum displays, including a Legion of Super-Heroes flight ring and Brainiac 5's force field belt. He used Rip Hunter's time machine, also on display in the museum, to travel to the 20th century, intent on becoming a superhero and forming a corporation based around himself to make a comfortable living. He is a shameless self-promoter whose obsession with fame and wealth irritates other heroes.
Carter's nickname as a football player was "Booster", but his chosen 20th century superhero name was "Goldstar". After saving the president, Carter mangled the two names, causing US President Ronald Reagan to introduce him as "Booster Gold". The name stuck. In a running joke throughout the DC Universe, people erroneously call him "Buster" to his chagrin. Most of the people who don't know him are calling him ''Green Lantern''.
He was also good friends with both the second and third incarnations of the “Blue Beetle“, Theodore “Ted“ Kord and Jaime Reyes.