Adventure Time Super Fans Wiki

S1e21 donny releasing obnoxygen.png

Obnoxygen is a gas that Donny omits when he is being a jerk (or as in it's own name, when Donny is obnoxious). After reforming Donny from his mean ways, Finn has to turn Donny back into a jerk so he can use his obnoxygen to stop the Why-Wolves in the episode "Donny" from terrorizing the Housies.