When Little Wolf's parents find that lately he's been being too good - doing stuff like brushing his teeth and fur and going to bed early without being asked, they decide to send him to be schooled by his uncle, Bigbad, to learn the 9 rules of badness.
During his adventure, Little Wolf encounters a fox named Mr. Twister who seems to have it out for Bigbad. He's also apparently allergic to him because every time he encounters him, he sneezes.
Sneezes at 3:33, 3:45, 16:56, 22:59
The special is available on DVD, for those that have Prime/Amazon Video, or at cost on YouTube and other services. Don't know of any free video currently, other than the Amazon one, and I don't think we have any to download off of that.