Racer X

Racer X is actually Speed Racer's older brother Rex, this story was covered in the episode "Challenge of the Masked Racer". Rex got into an argument with his father after he wrecked the first car Pops built. Rex the chose to leave the family and vowed to become the world's greatest race car driver. He frequently helps Speed out of trouble from people who would want to hurt Speed because of his driving skills. Rex does this under the as an "agent" working with law enforcement.

Racer X drives a yellow race car with the number 9 known as the "Shooting Star".

Character traits
Racer x is the most misunder stood racer on the formula one circut both feared and reverd, he inspires rumors that whenever he races crashe's are sure to happen, a face mask shrouds his face only futher adding to the reputaion that racer x is a jinx. Racer x is frequntly challenging speed to races oof the track, but during actullay races he saves him.

Relationships
Racer x is speed racer's older brother unknown to him and his family. He also has tie to Tajeo for he Tajeo, and Speed work to together in the final race to stop the tatsunoko company mobsters.

Behind the scenes
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Trivia
In every episode (that Racer X appears in), the narrator confirms that Racer X is Speed's older brother who went missing.

Casting
In the original series he was voiced by Peter Fernandez, in the Speed Racer Film, Racer X is portrayed by Matthew Fox. Keanu Reeves (The Matrix) turned down the role.

In earlier interpretations of the project, Vince Vaughn was intended to play Racer X.

Alternate Stories
In the 2008 movie and the Speed Racer X television show, Racer X is thought to be dead after the car accident instead of leaving the family.