The most iconic rivalry started when Goku surpassed Vegeta, the prince of Saiyans, as a fighter. They might have become allies later, but their rivalry only grew stronger.
Battles between Naruto Uzumaki and Sasuke Uchiha are one of the most exciting elements of the franchise. However, their relationship matures as the show proceeds.
Guts and Griffith begin as close friends. But Griffith's betrayal causes pain to Guts. Later, he starts a hell-bent journey to stop his former friend.
Light and L are intelligent individuals involved in a long struggle. The two masterminds spend time feuding in various cat-and-mouse chases.
Izuku Midoriya and Katsuki Bakugo are the star students of rival classes 1-A and 1-B. Originally childhood best friends, they were rivals when they decided to enlist in UA Academy.
After Spike's departure, Vicious takes over as the leader of the Red Dragon Syndicate. Their climactic battle at the end of Cowboy Bebop is iconic.
Gary and Ash battle on and off throughout Ash's journey through the Indigo and Orange leagues.
Mugen and Jin are always ready to slit each other's throats as their backgrounds and personalities clash. Although they gain some mutual respect, they constantly want to fight each other.
Ryuko Matoi constantly seeks answers from Satsuki Kiruin about the strange school, but the school council president always turns her down.
All Might constantly crashes Endeavor's dream of becoming the world's number one hero, sparking a lifetime rivalry.