Martian Manhunter

A-Mortal

Member of Hyperclan with hideous appearance.

Abnegazar

J'onn J'onnz was teleported to Earth from Mars and stranded here 50 years ago. He now uses his extraordinary Martian abilities as the Martian Manhunter, and has been a faithful member of every incarnation of the Justice League. Martian Manhunter was part of the JLA when the team overcame the 3 demons.

Abner

abners boss's [the joker] enemy.

Ace

J'onn J'onnz was teleported to Earth from Mars and stranded here 50 years ago. He now uses his extraordinary Martian abilities as the Martian Manhunter, and has been a faithful member of every incarnation of the Justice League. J'onn was a member of the JLA when the team first faced Ace and the rest of the Royal Flush Gang.

Adele

Zatara's assistant.

Alex Luthor

Alex Luthor was born on Earth-Three, being the son to Lex Luthor and Lois Lane.

Amazo

Created by Professor Ivo with revolutionary Absorption Cell Technology. This android can replicate the powers of any metahuman he encounters.

Armek

Member of Hyperclan.

Arthur Light

Dr. Light is a recurring enemy of the Justice League and the Teen Titans, manipulating light energy for various nefarious purposes.

Asmodel

Asmodel was one of the Four most respected Angels in Heaven. However, he rebelled against Heaven and became a servant of Neron.

B'enn B'urnzz

J'onn was mistaken for B'enn by the future police, and teamed up with them to capture B'urnzz after the confusion was cleared up.

B'rett

Early Martian Manhunter villain who caused him to reveal his presence on Earth, leading to his joining the Justice League of America. The only known Yellow Martian in DC continuity.

Backlash

Member of the Aryan Brigade with the power to strech himself.

Barry Allen

Barry Allen is the Silver Age Flash and will always be the first Silver Age superhero. He is the second Flash in the Flash family tree, and has recently returned to life after his famed death in Crisis on Infinite Earths. His actions led to the New 52.

Bel Juz

A Green Martian that was exiled from Mars after the "Blue Inferno" event that eradicated all life on the planet.

Bette Noir

A hideous monster with telepathic abilities and the astral form of a beautiful woman. She is an enemy and sometimes ally of the J'onn J'onzz.

Black Adam

The original champion of Shazam, Teth Adam reigned from Ancient Khandaq, an Arab country near Egypt. He was imprisoned when his power corrupted him. He was released when Theo Adam found his talisman.

Blind Faith

Member of the Aryan Brigade

Brother EYE

The Pre-Crisis version was the computer assistant of Buddy Blank, the original OMAC. The Post-Crisis retcon recreated Brother Eye as a autonomous A.I. dedicated to monitoring the world's metahumans.

Cabal

A conglomerate of the psychic and physical powers of five individuals trying to stop the marriage of Red and White Saturnian royalty Jemm and Cha'rissa.

Captain Cold

Captain Cold is the leader of the Rogues. He was the third super-villain to ever face the Flash.

Cay'an

Cay'an masterminded a plot to destroy Martian Manhunter in his 2006 Mini series.

Colonel Rumaan Harjavti

Part of the JLI when the team battled Harjavti

Commander Blanx

Commander Synn

Crucifer

A vampire of the Tenth Circle who faced the JLA and Doom Patrol

D'Kay D'Razz

D'Kay D'Razz is an insane Green Martian who was pulled to Earth by Dr. Erdel. Years later she came out of hiding to plague J'onn J'onzz. She was obsessed with starting a new Martian race with him, but was ultimately rebuked.

Darkseid

Martian Manhunter has faced Darkseid numerous times in the past, notably when Apokalips invaded Mars many years before J'onn was transported to Earth. In the possible future of DC One Million, J'onn is responsible for Darkseid's passing, forcing him to become one with the Source.

Deborah Darnell

Before the creation of the Star Sapphire Corps, Deborah Darnell was the fourth woman to become the super-villainess known as Star Sapphire.

Despero

One of the Justice League's oldest foes, Despero was transformed by the Flame of Pytar into a galactic tyrant whose psychic might is matched only by his prowess as a physical juggernaut.