*On the track, Speed Racer's greatest competition is Racer X. The mysterious, masked racer is the best, and most feared racer on the circuit. Other drivers think he is jinxed and causes crashes, but after many adventures together, Speed realizes that's not true and comes to idolize the masked man. He even harbors the secret belief that Racer X may be his runaway older brother, Rex Racer! *Source: Back of Card