Crossover of Unions Wiki

Killer Croc

Waylon Jones (ウェイロン・ジョーンズ, Weiron Jōnzu), also known as "Killer Croc" (キラークロック, Kirā Kurokku), is both a fictional character and antagonist of the M.D.C series created by C. B. Cebulski and Jim Lee. He is one of Batman's common opponents.

He was born with a form of atavism and a rare body mutation that only slowly changed him over time, taking the appearance of a half-man, half-reptile. Waylon was constantly bullied and taunted by his aunt because of his reptilian appearance.

In retaliation to his discrimination after finally reaching his breaking point, he killed her. Waylon eventually became detached from humanity, and his misanthropy grew as did his bestial nature, pushing him to a life of crime and a cannibal murderer.

Since then, he began to accept his place in society as always being seen as a monster. As years passed, his condition would make him more and more into a monster, eradicating any traces of humanity that might have been left as he became a monster in body and spirit.

"I will enjoy feasting on your bones!"

—Killer Croc, to Batman.

Appearance & Biography[]

Voice actor: Steve Blum (English), Not Known (Japanese), Not Known (Arabic), Not Known (Basque), Not Known (Brazilian), Not Known (Cantonese), Not Known (Catalan), Not Known (Chinese), Not Known (Croatian), Not Known (Danish), Not Known (Dutch), Not Known (Finnish), Not Known (Filipino), Not Known (French), Not Known (Galician), Not Known (German), Not Known (Greek), Not Known (Hebrew), Not Known (Hong Kong), Not Known (Hungarian), Not Known (Indonesian), Not Known (Italian), Not Known (Korean), Not Known (Mandarin), Not Known (Norwegian), Not Known (Polish), Not Known (Portuguese), Not Known (Romanian), Not Known (Russian), Not Known (Serbian), Not Known (Spanish), Not Known (Swedish), Not Known (Tagalog), Not Known (Thai), Not Known (Valencian), Not Known (Ukrainian), Not Known (Brazilian Portuguese), Not Known (Canadian French), Not Known (European Spanish), Not Known (European Portuguese), Not Known (Latin American Spanish), Not Known (Latin Spanish), Not Known (Spain-Spanish)


Born with a rare mutation that made his skin green and scaly, and which grew his body to grotesque proportions, Waylon Jones was raised in a genetics research facility for study. He briefly worked as a carnival freak under the name Killer Croc, but his misanthropy grew as did his bestial nature, pushing him to a life of crime. As his physical condition and mental state deteriorate, Killer Croc becomes a more bestial foe, increasingly detached from humanity.


As Waylon Jones[]

As Killer Croc[]

  • Hair Color: N/A
  • Skin Color: Green
  • Eye Color: Yellow
  • Age: Not Known
  • Birthday: Not Known
  • Height: 11' 0"
  • Weight: 580 lbs. (141 kg)


  • Killer Croc has incredibly thick, tough skin and razor-sharp teeth and claws.
  • An expert wrestler, his strength and stamina are at a near-superhuman level.
  • Heightened senses, and extremely fast reflexes.
  • Able to survive in water for extended periods of time.
  • An intense hatred of humanity.
  • Cannibalistic.







  • unnamed mother (deceased)
  • unnamed father
  • unnamed aunt (deceased)




Powers and Abilities[]



Physical Abilities[]

Fighting Style[]


Strength level[]




Miscellaneous Skills[]


  • Shock Collar: Waylon, although having almost superhuman durability, is extremely vulnerable is the shock collar around his neck. If hit in the collar, he will temporarily get electrocuted by the collar and falls down.









Early history[]



Plot in the Series[]







Early Versions[]

Anime and Manga Differences[]


Translation and Dub Issues[]

Theme songs[]

Other Appearances[]

Other Media[]


Video Games[]

Playable Appearances[]

Enemy Appearances[]

Support Appearances[]

Non-Playable Appearances[]

See also[]


External links[]

Notes & Trivia[]

  • Killer Croc first appeared in Batman #357 (January 1984).
  • According to Croc himself it takes him roughly 8 hrs to digest something.
  • Joker was heard saying, "Tick-tock, tick-tock, is that a crocodile I hear?" This was a nod to Peter Pan, which featured a crocodile that at one point had swallowed a clock, which caused people around it to hear the infamous ticking as it drew near. Aaron Cash's missing hand was also a nod to Captain Hook in Peter Pan.
  • In Dr. Young's Notes, Penguin's signature was seen at the top of his page. That could have been a small reference to LEGO Batman: The Videogame, in which Penguin, Killer Croc, Catwoman, Bane and Man-Bat teamed up in an evil plan to terrorize Gotham, although this is unlikely.
  • At the Medical Facility, an old prison cell was used as a Riddler Challenge puzzle to unlock Croc's Biography. That was most likely Croc's previous cell before he was moved to the sewers. The cell, however, seemed to be too small to fit something as big as Killer Croc.
  • After the events of Arkham City, Croc could be seen in the Iceberg Lounge Challenge Map teamed up with Penguin and watching Batman fight many enemies while smoking a cigar and sipping a glass of liquor.
  • He was one of the few villains in Arkham City that could have attributed to the fact that none of those characters could physically kill (along with Bane and Hush).
  • Killer Croc was one of only four villains to appear in all the Arkham games. The other three were: Joker, Riddler, and Harley Quinn. Although the Riddler never physically appeared in Arkham Asylum, he still played a big part of the game. Harley only appeared as Dr. Harleen Quinzel in Arkham Origins.
  • As seen in the "Gallery" of this page, Killer Croc not only killed his victims by hand. Croc also shot them, as he used to own multiple guns. Croc also used to possess a bag of cocaine (and a weed plant according to rumors), which meant that he dealt in or had more likely (given his human side was that of a street thug) used drugs.
  • When Killer Croc emerged from the elevator, the P.A. announced his arrival and granted Killer Croc's guards their "Shoot to Kill" permissions. Although Croc's upper body had no actual clothing, his biography mentioned that his skin was so tough that it could even repel gunfire, so shooting was useless. Captain Gordon hit a Joker Henchman Sniper with a baseball bat, and the bullet grazed Croc's right shoulder after he escaped and attacked Batman. That further showed the progression of Croc's mutation.
  • Killer Croc's Arkham Asylum bio listed his occupation as a "professional criminal" but in Arkham City, his bio listed his occupation as an "alligator wrestler, gangster, and murderer".
  • Even though his name was on the Joker's Party List, Croc appeared to be the only inmate during Joker's takeover not to be released from his cell as he attacked the door that Batman was behind. However, given his tendency to attack and eat guards and inmates alike, it was likely that Joker's men where afraid to free Croc from his cell, or Joker left him there to guard the plant spores that were needed to create a vaccine to the Titan Formula, as he likely realized that Batman would surely seek out an antidote for the formula.
  • When Killer Croc rammed into Batman (which occurred if the player was unable to throw a Batarang in time), it was possibly a very small trait from his wrestling career as wrestling is a full-body contact sport.
  • In Arkham Knight, it's explained that Croc's mutation was accelerated by trauma. Croc even pointed out to the person who experimented on him, Warden Ranken, that he "made [his condition] worse".
  • One of the torturous experiments performed on Croc to study his healing factor, involved sawing off his hand and part of his left arm. Croc's hand and left arm later regenerated and his severed arm was apparently kept for study as it is later recovered from wreckage of Iron Heights Prison Transport, and placed in an Evidence Display case in the West Wing of GCPD Maximum Security.
    • Croc having his left hand and arm severed can be seen as a form of both irony and poetic justice considering Croc was responsible for biting off Aaron Cash left hand, forcing him to wear a prosthetic hook. Despite the troubled history between the two, Cash is shown to feel some sympathy for the torture Croc suffered, including the brutal severing of Croc left arm in the name of science. However Cash while a feeling some sympathy for what Croc had gone through, Cash is quick to point out that unlike Croc, his hand didn't grow back.
  • Croc's Knight appearance looked more like a crocodile on its hind legs, rather than a mutated human and is reminiscent of Killer Croc from animated series, The Batman (who also resembles a crocodile and even has a tail).
  • In the new remastered Iceberg Lounge Map in Arkham Knight, a certain amount of thugs are to be defeated before you fight Killer Croc himself. This can only be done as Batman and Nightwing himself will jump into the fray to even the odds.
  • Croc was both a victim and a villain in The Season of Infamy DLC side mission "Beneath the Surface".
  • Croc growing a tail is considered strange by many fans, as a mere skin condition would not result in such changes. Some thus believe that genetic modification (similarily to that of Man-Bat) is somehow involved, despite the fact that Waylon was born with the condition.
  • Killer Croc's idle stance in Arkham Asylum is modelled after rapper 50 Cent. This shows that despite his animalistic appearance and tendencies, he still retains the "gangster" aspect of his personality.