Toxi-Gag

Toxi-Gags are poisonous green gas bubbles that appear out of Toxi-Klangs in Grunty Industries. When Banjo and Kazooie enter its "patrol area", it whisks itself over to them and covers their face, forcing them to hold their breath and lose oxygen. Kazooie alone is fast enough on her feet to outrun them; however, Banjo alone cannot avoid them so easily and must keep considerable distance away from them to avoid being poisoned.

Toxi-Gags can only be destroyed with the Wonderwing or by being frozen with Ice Eggs and then destroyed.

Trivia
Toxi-Gags appear to have no known effect on the washing machine transformation.