Real name: J'onn J'onzz 
Powers: Superhuman strength, speed, durability and endurance, Regenerative healing factor, Flight, Elasticity, Phasing, Density Shifting, Invisibility, Shapeshifting, Telekinesis, Telepathy, Martian vision, Nine senses
Skills: capable detective
First time I saw the character: Justice League TV series

One of the sole survivors from Mars, J'onn J'onzz travels to Earth and learns their human customs. Being the powerful being he is, he was excepted into the Justice League to protect Earth. With his powerful mind, he might be the most powerful telepath in the DC universe. Though with all this power, J'onn is a compassionate and wise man, and strives to do what is right. Even being an alien far from Earth, he shows us all what it means to be human.

- First Martian Manhunter appearance

- Justice League TV series

- Young Justice TV series

- Supergirl TV series (2015-Now)