Supreme King

The Supreme King (voiced by Matthew Charles) is Jaden's evil side that once took control of him in the alternate dimension when he was looking for Jesse Anderson. He duels with Elemental Heroes and Evil Heroes. His goal was to rule the dimension with an iron fist, but he was defeated when Axel Brodie dueled him, and it resulted in a tie. When Jaden came to, he felt guilt driven over what he did as the Supreme King, but he eventually was able to use the power of the Supreme King to duel Yubel.

Trivia

 * In Jeffrey, Jaden, and Friends Adventures of Indiana Jones and The Temple of Doom, Jaden sacrificed himself to Set and the villains, in order to save Alexis' life. Set turned him back into the Supreme King, but the heroes were able to return him back with memories, because they didn't want to hurt him. While bringing Jaden back, Jeffrey personally spoke with The Supreme King himself, asking why would he want to help the bad guys.