Redakai

Redakai: Conquer the Kairu is an animated series starring Ky, a 15-year-old student of ancient martial arts who embarks on an incredible quest to find the Kairu, a primordial alien energy force. Helped by his friends Maya and Boomer, Ky travels the globe looking for the Kairu to protect it from his extraterrestrial teenage opponents, with the hope that one day he will become the greatest Kairu warrior of them all -- a Redakai.