2 Martian Manhunter Would Fall To Magneto's Might While he does have some amazing powers, too many of them are ones that Magneto has ways to deal with. His helmet would protect him from Martian Manhunter's telepathy, which puts the alien at a disadvantage.
Hyperion's power levels are on par with those of Superman and while J'onn has some extra powers that even things up, Hyperion's heat vision would be all he needed to take down Martian Manhunter.
Even if he did, Superman can move at the speed of light. Before he would fall unconscious, he could hit Magneto's force field at the speed of light, multiple times with super strength. There's no way Magneto's forcefields could stand up to that and just like with Wonder Woman, one punch is all it would take.
Namor was able to run through the entire Brotherhood, including Magneto. Namor's strength and durability allowed him to outlast Magneto's attacks and take him down, before leaving so he could figure out new ways to attack the surface world.
Undoubtedly, Magneto could overpower Jean Grey without the Phoenix Force. Jean Grey's telepathic abilities are completely null and void against Magneto, but he would not be unaware of her attempts to reach out.
Originally Answered: Can Magneto defeat Galactus by using Galactus' suit against him and crush him? No. His armor isn't real. Galactus is a cosmic Abstract being, and his form at any given moment is a function of the limited mortal brain processing the impossible.
He can assemble complex machinery in seconds and manipulate the iron in blood to take control of people's actions. He has even shown power over forms of energy on the electromagnetic spectrum like visible light and gamma rays, though he rarely uses these abilities.
3 Magneto. Much like other mutants who are not physically strong but are capable of great physical feats, the Omega-level Master of Magnetism could defeat the Juggernaut in any number of ways.
This isn't even getting into the fact that, as we saw in Avengers #111 (by Steve Englehart, Don Heck and Mike Esposito), Magneto can control people's minds with his powers, so he could "wield" Mjolnir, in a way, by "wielding" Thor himself... (And yes, it is creepy that he has his daughter dancing for him).
Magneto should have been able to take Iron Man down with ease, but when the two fought, Tony Stark gave the X-Men a NEW Master of Magnetism. Iron Man beat the X-Men's Magneto, in one of the most spectacular battles in the "Avengers Vs. X-Men" event.
Lets be honest here, most cases the Hulk should easily take this win. Even if the entire battlefield was metal for Magneto to use, it wouldnt really matter, because as you know, Hulk smash. Hulk judy needs to land a single hit on Magneto, and the win is his.
Unlike other members of the team, in his ice form, Iceman is completely ice, meaning Magneto can't even affect his blood because he doesn't have any at that point. While Magneto has gotten his licks in on Iceman, he's never been able to beat the mutant.
Martian Manhunter is also extremely strong and durable, with fire being one of his few weaknesses. His tenacity and strength give him enough of an edge to be able to take down Black Adam in the end.
It is not so much that Magneto cannot affect vibranium, but that the metal's vibratory nature and energy-absorption components can be harnessed in such a way that the Master of Magnetism meets his match.
Although Cap's internal conflicts prevented him from being fully worthy to lift Mjölnir during Age of Ultron, Cap really almost pulled off stealing Thor's thunder.
While Thor himself is not strong enough to defeat Juggernaut, he has the help of his famous hammer Mjölnir. Since Mjölnir can only be wielded by the worthy, Juggernaut has no chance of lifting it.
Magneto rips the Adamantium from Wolverine's bones, killing Wolverine, leaving just a severely charred skeleton and an arm of flesh due to his healing factor not working.
It's certainly possible for him to get the upper hand on the Master of Magnetism, but most of the time, Wolverine doesn't stand a chance against Magneto and all of his incredible power.
When Mr. Sinister looks into his five-year plan, it reveals Juggernaut is used as a weapon to murder Thanos, as his powers are boosted, turning him into a being strong enough to kill the Mad Titan in one of the most brutal ways imaginable.
Able to affect objects on a global scale, Magneto's powers can even reach outer space if he really exerts himself. The Master of Magnetism even managed to save Kitty Pryde at one point, who was trapped inside a city-sized intangible bullet known as the “Breakworld Bullet” at the time.
Some of Magneto's weaknesses include: He is vulnerable to metal weapons: Magneto's powers are based on his ability to manipulate magnetic fields. This means that he is vulnerable to metal weapons, which can disrupt his magnetic field and weaken him.
