Martian Manhunter is a superhero from the DC Comics universe, known for his green skin, shape-shifting abilities, and telepathy. His real name is J'onn J'onzz, and he hails from the planet Mars. After his home was destroyed, he became one of the founding members of the Justice League, using his powers to fight for justice on Earth. In addition to his shape-shifting and telepathic skills, Martian Manhunter possesses superhuman strength, flight, and invisibility. He is often portrayed as a wise and compassionate character, struggling with his identity and the loss of his Martian heritage. His unique abilities make him a valuable ally in battles against various villains.