Magneto (X-Men: Evolution)

During the show's first season Magneto is a shadowy, mysterious manipulator. Except for Xavier, and later Wolverine, none of the X-Men know about his existence. He initially acts through his agent Mystique, who is currently the principal (Principal Darkholme) of Bayville High School. He instructs her to gather mutants to his cause, to which end she recruits Toad, Avalanche, Blob, and Rogue (although Rogue later leaves to join the X-Men). She forms these mutants into a team, the Brotherhood of Bayville, and also lodges them in a nearby boarding house. He also tells her specifically to recruit Pietro Maximoff, with whom he has a strained relationship. Pietro agrees to join the Brotherhood when Magneto breaks him out of jail.Subsequently, Pietro occasionally acts as a spy within the Brotherhood house, working for Magneto without Mystique's knowledge (for example, when Mystique attempts to reconcile with her son Kurt, now the X-Man known as Nightcrawler).

In the season finale, Magneto becomes a more direct threat. He approaches Alex Masters (secretly the brother of X-Man Cyclops) in Hawaii and uses him to sway Cyclops to his cause. He also pits the Brotherhood (and Sabertooth) against the X-Men in a series of duels, then brings the winners (and Charles Xavier) to Asteroid M to form a new elite society - those that will not join him willingly (such as Xavier, Jean Grey, Rogue, and Storm) he places in stasis. Using a special chamber powered by the Crimson Gem of Cyttorak, he enhances the mutant abilities of Sabertooth, Cyclops and Alex (now named Havok) - it is implied that Magneto's power is already fully advanced.

Meanwhile, Mystique becomes bitter at having not been brought to Asteroid M, despite all the sacrifices she had made for Magneto. Scorned, she helps the remaining X-Men (including Wolverine) to reach Asteroid M and destroy it. Magneto's captives are rescued and Cyclops and Havok are convinced that Magneto has been using them all along. The Asteroid crashes to the ground, but Magneto manages to escape.

Seasons 2 to 4Mystique's vendetta against Magneto lasts throughout the second season. In the second season, Magneto personally recruits a new team, he Acolytes, de-ages himself using the same technology that created Captain America, and finally reveals the existence of mutants to the public after the X-Men and Brotherhood fight off a Sentinel which was meant to destroy every mutant known. In this time is daughter Wanda is introduced, who hates Magneto for abandoning her as a child an leaving her in a mental asylum. She hunts him down relentlessly until he uses the mutant Mastermind to change her memories, paiting him in a new light. In the third and fourth seasons of the show, Magneto dedicated himself to preventing the awakening of the mutant Apocalypse, although all his attempts fail and upon Apocalypse's awakening he is transformed into one of his Four Horsemen after he is thought to have been killed by Apocalypse. He is freed of this enslavement in the final episode Ascension (Part 2), and is last seen being helped by his two children. In the final moments of the episode, Charles Xavier reveals that he witnessed the future in the mind of Apocalypse, and among the visions he saw Magneto becoming an ally of the X-Men and training the New Mutants, like he did in the comics.