Well fear gas doesn't effect Joker and Scarecrow doesn't have any emotions as in Love, or Humor.

Why would Joker's laughing gas be based on emotion? Actual laughing gas has nothing to do with making someone happy.

@xerox_kitty: Uh this is a comic book. Not real life, so laughing gas is somewhat different from Joker compared to like a dentist.

@AquaDCman said:

@xerox_kitty: Uh this is a comic book. Not real life, so laughing gas is somewhat different from Joker compared to like a dentist.

Still Jokers laughing gas does not work on emotion. It is just a chemical that makes your body laugh and die, not make you laugh out of happiness.

I would imagine that Scarecrow would have built up some sort of immunity to gases/chemicals such as Joker's laughing gas.

@Gambit1024

Remember, though, that Scarecrow is fairly often defeated by being gassed with his own fear toxin. It happens less often in the comics than it does in film and TV shows, but it happens and he is affected. If he would be immune to any toxin, it would be his own, and he's not immune to that.

@AquaDCman

We haven't seen Joker gas Scarecrow recently, at least not since Scarecrow became deadened to all emotion (although I agree with most people here that Joker's toxin isn't usually portrayed as actually affecting emotion).

However, there was a short-lived Joker comics series in 1975 and '76. It only lasted nine issues, but in #8, Joker and Scarecrow were fighting and it ended with Joker gassing him with a non-lethal variant of his trademark toxin as he thought Scarecrow was being too much of a fuddy-duddy. This gas did affect Scarecrow, who was left giggling foolishly for law enforcement to pick up.

But keep in mind that the idea that Scarecrow doesn't experience any emotion is a fairly recent development. What's more, we haven't seen if it applies any more in the new DC reboot universe.

I have no clue about the Scarecrow being immune to Joker toxin, and I don't know if it's cannon or not, but I do remember reading either in a DC book or on his page on here that Joker is immune to most toxins and poisons, including Scarecrows toxin.

I think it does, I am pretty sure it is mentioned somewhere

yes it would effect him. Johnathon crane crane is only immune to his own fear toxin. jokers laugh toxin is a totally different substance.

what about the iteration of scarecrows mask that comes with a gas mask... so i don't think it would