Martian Manhunter, also known as J'onn J'onzz, is a fictional character in DC Comics. He first appeared in Detective Comics #225 in 1955. J'onn is the last surviving member of the Green Martian race, and he possesses a wide range of abilities, including super strength, telepathy, shape-shifting, and flight.
J'onn was accidentally teleported to Earth from Mars and eventually adopted the guise of John Jones, a detective in the city of Middleton. He later joined the Justice League of America and became a key member of the team.
J'onn has been depicted as a complex character with a tragic past, as he is haunted by the memories of his dead family and his destroyed homeworld. He has struggled with identity issues, as he tries to fit in with the humans of Earth while also embracing his Martian heritage.
Despite his immense power, J'onn is often depicted as a gentle and compassionate being, seeking to use his abilities to help others. He has been a staple of the DC Universe for over six decades and has appeared in various media adaptations, including television shows, animated series, and video games.
