Racer X

Racer X is actually Speed Racer's older brother Rex, this story was covered in the episode "Challenge of the Masked Racer (Part 2)". Rex got into an argument with is father after he wrecked the first car Pops built, rex the chose to leave the family and vowed to become the worlds greatest race car driver, He frequently helps speed out of trouble of people who would want to hurt speed because of his driving skills,and Rex does this under the title as a "agent" working with law enforcement.Racer X drives a yellow race car with the number 9 known as the shooting star In the original series he was voiced by Peter Fernandez, in the Speed Racer Film, Racer X is portrayed by Matthew Fox.In the 2008 movie and the Speed Racer X television show Racer X is be thought dead after the car accident instead of leaving the family.