Karate Kid (Karate Kid #1)

Karate Kid travels to the 20th Century to capture Nemesis Kid, who has recently escaped his prison. While some Legionnaires don't agree with it, they allow him to stay in the past and stop Nemesis Kid, who was able to escape Karate Kid's grasp thanks to his super-powers. after defeating Nemesis Kid, Karate Kid decides to stay in the 20th Century because he feels alive there.