He hisses and then sprays Joesph and Cody, and then bites Cody and gives him rabies. He sprays Chef PeePee two times, and had poop stuck inside of his fur.
Bowser Junior later brought him under Bowser's bedsheets. When Stinky was under the bedsheets, Bowser thought Chef PeePee was under his bedsheets, but it was actually Stinky, then he sprayed Bowser. After that, he got defeated by Bowser killing him.