Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Racer X also known as (Fukumen "Masked" Racer) is a recurring fictional character in the Japanese manga and anime Mach GoGoGo (known in English as Speed Racer). Racer X is a heroic, mysterious, flamboyant, selfless, sympathetic and often brooding soldier of fortune. His secret identity is Rex Racer, the eldest son of Mom and Pops Racer and the older brother of Speed and Spritle. Years before the start of the series, Rex had a falling out with Pops after wrecking the Mach One (the first car Pops ever built) at the end of his first race as a professional driver (seen in flashbacks throughout the series). Racer X drives the number 9 car, the Shooting Star.