10. Killer Croc
In Croc’s initial string of appearances — a Batman and Detective Comics crossover story arc that culminated in Jason Todd adopting the mantle of Robin — he was depicted as an unnamed, shadowy figure in a trenchcoat. A ruthless criminal who wants to become the crime kingpin of Gotham City, Croc works behind the scenes using methods like sniping to eliminate his criminal competitors. He briefly unites a small army of Batman villains under his leadership. When Batman finally confronts his mysterious foe, the villain is revealed to have a massive physique and reptilian appearance. It is then revealed that his real name is Waylon Jones, born with a form of atavism that imparted him with reptilian traits. His parents grew to loathe their child’s hideous appearance and brutal behavior.
While still an adolescent, his father abandoned him in the wilderness. Croc survived, becoming a career criminal. Batman and the new Robin defeat him after a desperate battle. In these original, pre-crisis appearances, Killer Croc resembled a powerfully-built man covered entirely in green scales, but was still basically human in his facial proportions and build. He was also originally depicted as gunning down Jason Todd’s parents (this was later retconned to make Two-Face their murderer). His appearance and personality have become increasingly bestial, explained in the comics that his disease has slowly robbed him of all identifiable human traits. In his most recent appearances, he has an elongated snout and tail. -Wikipedia.org
Bane is a fictional character that appears in comic books published by DC Comics. Bane has been one of Batman’s more physically powerful foes. A virtually unstoppable juggernaut, he is best known for breaking Batman’s back in the “Knightfall” story arc.
Bane is highly intelligent; in Bane of the Demon, Ra’s al Ghul says that Bane “has a mind equal to the greatest he has known.”In prison, he taught himself various scientific disciplines equal to the level of understanding of leading experts in those fields. He knows six active languages and at least two additional arcane and dead ones. Among these are Spanish, English, Urdu, Persian, and Latin. The Bane of the Demon storyline reveals that he has a photographic memory. Within one year, he is able to deduce Batman’s secret identity.
Although extremely dangerous at all times, Bane is perfectly sane and in control of his mind and actions—a trait that separates him from many of Batman’s enemies. While he generally acts as a villain, Bane has worked alongside Batman at times and developed a great respect for the Dark Knight. He is also one of the few villains of Batman to have learned his true identity. He is also resistant to telepathy as he can think of something so quickly and so intensely that even the Martian Manhunter can not read what is in his mind -Wikipedia.org
8. Harley Quinn
Harley Quinn (Dr. Harleen Frances Quinzel) is a fictional character, who was first introduced as a supervillainess on September 11, 1992, in the animated series Batman: The Animated Series, later adapted into DC Comics’ Batman comic books. As suggested by her name (a play on the word “harlequin”), she is clad in the manner of a traditional harlequin jester. The character is a frequent accomplice and the girlfriend of Batman’s nemesis the Joker, and is also a close ally of Poison Ivy, from whom she gained her immunity to poisons and toxins. -Wikipedia.org
7. Poison Ivy
Poison Ivy (Pamela Lillian Isley) is a fictional character, a DC Comics supervillainess who is primarily an enemy of Batman. Created by Robert Kanigher and Sheldon Moldoff, she first appeared in Batman #181 (June 1966). Poison Ivy is depicted as one of the world’s most prominent eco-terrorists. She is obsessed with plants, botany, and environmentalism. She uses toxins from plants and mind controlling pheromones for her criminal activities, which are usually aimed at protecting the natural environment. Fellow villain Harley Quinn is her recurring partner-in-crime and possibly her only human friend.
She is best known as a villain of Batman and plays an important role in his rogues gallery and has proven to be one of his more powerful foes. Pamela Isley aka Poison Ivy has been portrayed as a love interest for Batman in some comics. In one comic, Ivy was robbing a charity gala Bruce Wayne was attending. Ivy’s first kiss was poison, the second its antidote. When they first meet, Ivy’s toxic lips planted a seed of toxic rapture in Bruce. But when she later kissed a dying Dark Knight, Ivy unknowingly cured her intended victim and established a budding romantic tension between them. -Wikipedia.org
The second Clayface, Matt Hagen, first appeared in Detective Comics #298. A treasure hunter, Hagen finds a mysterious radioactive pool of protoplasm in a cave. Immersing himself in it, he is transformed into a malleable clay-like form which could be shaped into almost anything he desires. This is only a temporary effect, however, requiring him to return to the pool periodically in order to maintain use of his powers. He eventually copies the pool’s protoplasmic jelly by chemistry studies, although the artificial proptoplasm only allows him five hours of Clayface powers compared to the full two days of the pool’s. Hagen is ultimately killed by a shadow demon during the 12-issue limited series Crisis on Infinite Earths. -Wikipedia.org
Once Harvey Dent, District Attorney of Gotham City and an ally of Batman, he goes insane after a criminal throws acid in his face during a trial, hideously scarring the left side of his face. He becomes the crime boss Two-Face and chooses to bring about good or evil based upon the outcome of a coin flip. Originally, Two-Face was one of many gimmick-focused comic book villains, plotting crimes based around the number two, such as robbing Gotham Second National Bank at 2:00 on February 2.
In his autobiography, Batman creator Bob Kane claims to have been inspired by Robert Louis Stevenson’s Strange Case of Dr Jekyll and Mr Hyde, specifically the 1931 film version which he saw as a boy. Kane had not read the novel when he and Bill Finger created Two-Face. Some inspiration was also derived from The Black Bat, whose origin story included having acid splashed in his face. In later years, writers have portrayed his obsession with duality and fate as the result of schizophrenia, bipolar and multiple personality disorders, and a history of child abuse. He obsessively makes all important decisions by flipping a two-headed coin, one side scratched over with an X. The modern version is established as having once been a personal friend and ally of Commissioner James Gordon and Batman. -Wikipedia.org
Unlike most of the Batman villains, the Penguin is in control of his own actions and perfectly sane, features that serve to maintain a unique relationship with his arch-enemy, Batman. This has extended into the current situation with the Penguin ceasing his direct involvement in crime, instead running a nightclub that is popular with the underworld; on one occasion he temporarily returned to active crime for the thrill of it, aware that Batman would learn about his actions but also secure in the knowledge that the Dark Knight couldn’t testify in court without revealing his identity.
As such, he is an excellent source of information on crime, so Batman grudgingly tolerates his operations so long as the Penguin agrees to be one of his informants. However, the entrepreneurial Penguin is often fencing stolen property or arranging early furloughs for incarcerated former criminal associates — for a hefty fee, of course — on the side. -Wikipedia.org
The Riddler possesses extreme ingenuity in decoding and formulating puzzles of all kinds. His deductive ability has perfused his new role of private detective, in which he is shown to have investigative skills that rival those of the Dark Knight. The Riddler has no superhuman abilities, but is a highly cunning criminal strategist. He is not especially talented in fisticuffs (although his endurance has grown from having to engage in them over the years), but sometimes employs weaponry that exploits his gimmick, such as exploding jigsaw pieces, his infamous question mark cane, known to house a wide variety of technological devices and weapons, and question mark shaped pistols. He is shown to be skilled with engineering and technology, confronting Batman and Robin with unique and elaborate deathtraps. -Wikipedia.org
The Scarecrow uses a variety of toxins that cause his victims to hallucinate that their phobias have come to life. He wears his Scarecrow mask to enhance the effect of the hallucinogen (instilling fear in all who see him) as well as to avoid being poisoned by his own toxin. Although not physically intimidating, Scarecrow can resort to physical combat, using a style called “violent dancing”, based partly on the crane style of kung fu and on drunken boxing.
The Scarecrow is an expert on psychology, with a focus on fear, and is a former certified professor on the subject. Due to prolonged exposure to his own gas, Scarecrow went from being frightened of bats to only being frightened of Batman. Scarecrow is both addicted to fear and incapable of fearing anything except Batman, whom he compulsively seeks in order to ease his addiction after the Caped Crusader’s apparent death. Scarecrow is chosen as a bearer of the twin of Sinestro’s yellow ring as a temporary Corpsman, giving him the powers of a member of the Sinestro Corps. -Wikipedia.org
The Joker is a fictional character, a comic book supervillain published by DC Comics. He is the archenemy of Batman, having been directly responsible for numerous tragedies in Batman’s life, including the paralysis of Barbara Gordon and the death of Jason Todd, the second Robin. Created by Jerry Robinson, Bill Finger and Bob Kane, the character first appeared in Batman #1 (Spring 1940). Throughout his comic book appearances, the Joker is portrayed as a master criminal whose characterization has varied.
The original and currently dominant image is of a highly intelligent psychopath with a warped, sadistic sense of humor, while other writers have portrayed him as an eccentric prankster. Similarly, throughout the character’s long history, there have been several different origin tales; they most commonly depict him as falling into a tank of chemical waste, which bleaches his skin and turns his hair green and his lips bright red, giving him the appearance of a clown. -Wikipedia.org