Batman has invaded Fortnite: Battle Royale as part of the game's latest crossover event, and the Caped Crusader comes alongside a special set of limited-time challenges to complete. As usual, most of the missions are fairly self-explanatory, but one of the more difficult challenges asks you to defuse Joker gas canisters found in different named locations. These can be tricky to find if you don't know where to look, which is why we're here to help.
In the video above, you can see where we've found several Joker canisters. Much like Vending Machines, the canisters will spawn in the same general areas, but they're not guaranteed to appear in every match, so you may need a little persistence to complete this challenge. We've reliably found them around Lucky Landing, Salty Springs, and the new Gotham City Rift Zone, so we'd recommend looking there. If you need more help finishing this challenge, be sure to check out our written Joker canister locations guide.