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Smilex

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Smilex gas canisters

Smilex (referred to in the game as "Happy Gas" by the Joker, and "Joker Toxin" by others) was a nerve toxin that attacked the nervous system of its victims, and caused a slow, painful death. It caused a fit of laughter, then stretched its victims face into a Joker-like grin and caused death. The toxin was also very dense, and sunk to the floor. However, it allowed would-be victims to climb to a higher point of safety.

When someone breathed in Smilex, it killed them while it gave its victim a vicious, sardonic smile on their face. There were many variations of Joker Gas, and it also affected animals such as cats, squirrels, and fish. Joker Venom could exist in liquid and gaseous states, and was used to great effect. The gas form was slightly denser than air, and in some portrayals, dissipated over time.

It appeared as an obstacle in many areas, and often had to be removed somehow before Batman could proceed. Falling into the Joker Gas was deadly, if the player did not hit the "escape" button fast enough.

Incident Reports

Arkham Origins Incident

The Joker, under the guise of Black Mask, used Joker Toxin on the Gotham Merchant's Bank Manager, which caused her to have a laughing fit even as she declared him insane.

Arkham Origins Multiplayer

In the map "Joker's Funhouse", Bane's Henchmen were trying to seize control of Joker's Smilex Factory by defeating Joker's guards, while Batman and Robin tried to shut it down.

Arkham Origins Blackgate Incident

Joker filled some rooms with the gas to either just slow down or to kill Batman. If Batman was exposed to the gas, a breath meter appeared in the upper left corner. If that meter ran out, Batman started to lose health. The effects were negated if Batman got away from the Joker Gas. Some of the gas chambers could be turned off when a certain gadget is acquired. Joker also revealed that he intended to leak the gas throughout the entire administrative building and throughout Blackgate Prison. The gas itself was created using various materials within the prison, and was procured by Harleen Quinzel.

Before A Matter of Family Incident

Sometime before the event's of Batgirl: A Matter of Family, after the death of Katie Burke, her father, Edward Burke, became extremely depressed, and was driven to the brink of suicide by Harley Quinn, who posed as a doctor by using her real name: Dr. Harleen Quinzel. Joker, who used the fake name, Jack White, gave Edward some pills to end his life quickly and without pain. In reality, those pills had the same effect of Joker Gas. Edward died in extreme pain, and laughed uncontrollably until his death.

Arkham Asylum Incident

During Batman: Arkham Asylum, the Joker raided the Decontamination Chamber of Arkham with canisters of Joker Gas, pumped it into the room, and killed ten guards and several of his own men in the process. Three guards and an inmate managed to climb to safety, and were quickly rescued by Batman, who knocked out the inmate to keep him out of trouble. Batman then found that the gas had overcome those who tried to operate the extraction system, which would ventilate the gas out of the room. The area was sealed off after the gas was detected, but was re-secured after Batman destroyed the extraction system fuse box with a Batarang, and triggered ventilation fans to filter the deadly gas out of the room.

The Joker also attempted to pump it into the Medical Facility's Patient Observation Room to kill Dr. Stephen Kellerman, an Arkham doctor, and security guard, Aaron Cash, and trapped one of his own men inside as well. Cash and Kellerman succeeded in surviving the attack by barricading themselves in an airtight room, which allowed enough time for Batman to arrive and get rid of the gas. Uncharacteristically, Batman did so by deliberately exposing another person to mortal peril, by dropping an inmate onto a weak ceiling to break it, though he acted quickly to vent the room and prevent the man from succumbing to the gas. Later on, Joker started to attach some cylinders of the gas into several security controls in the Botanical Gardens, the Intensive Treatment Center, and in the Caves when he planned to pollute the Gotham City River with the Titan waste products, if Batman failed to correctly hack the security panels the gas canisters would spray Batman enough to daze him. When playing as Joker, one of his attacks had him spray a cop with a can of Smilex, but it did not kill them, it just dazed him instead. Smilex is also used by Joker during predator challenge maps, where he'd spray the toxin at guards from the flower in his lapel, quickly killing them.

Harley Quinn's Revenge Incident

After Joker's death, Harley Quinn planned revenge on Batman. After she knocked out Batman, Harley locked him in a giant Joker statue. Two days later, Robin came to rescue Batman. After Robin defeated Harley, he saved Batman and discovered that the facility had a lot of Smilex bombs, and Batman had to deactivate them all before they detonated. After he deactivated all of the bombs, Batman went to defeat Harley. Harley used her Mechanical Guardians to attack Batman, and, after she saw that her plan didn't work, she reveals her failsafe: a hidden bomb in the Joker Statue. Harley set it off to kill herself and Batman, but failed when the Dark Knight leaped out of a window, and carried her with him.

Arkham Knight Incident

In Bludhaven, Harley Quinn used Smilex Bombs to escape and stun guards with guns to rescue Poison Ivy.

Gallery

Trivia

  • The effects of Smilex are similar to the legendary Sardinian Cabbage which supposedly causes laughter until the point of death.
  • The stun attack of Joker in the DLC "Play as The Joker" was Joker using a small amount of Smilex to make enemies confused. However, if applied on enemies, they could actually be heard laughing.
  • The name of the toxin was the same as the beauty products that Joker contaminated in the 1989 Batman film by Tim Burton.
  • The playable Harley Quinn presumably used Smilex in her smoke bombs to escape or stun her enemies. However, only cops actually laughed, as other enemy types had no sound files for laughing. Every other enemy type simply coughed, similarly to smoke bombs.
  • Harley Quinn for some reason when she used Smilex in her smoke bombs is not affected by the gas. This is likely because in the animated series and the comics, Poison Ivy gave her a vaccination against all toxins, similar to her own natural immunity.
  • In game during Arkham Asylum the gas doesn't cause facial alterations to the people killed by it. They can be heard laughing when exposed to it, but upon examining their bodies, their faces remain normal. The most likely explanations for this are either limitations with technology or time constrains, as it would probably be extremely difficult and take up a lot of time to add the severe facial alterations to every single body.

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