Mrs. Pants

Nasty Pants's mother appeared in Cabin Fever, when Rowley and Greg were tired of getting bullied by Nasty and they had told their fathers. They drove to Nasty Pants's house. When they got there, they rang the bell. Nasty Pants opened the door, the fathers of both Greg and Rowley were unaware that he is the bully and then his mother came. She explained that Nasty Pants was only five year old and gets "wounded up a little". After this, fathers of both Greg and Rowley felt ashamed of their sons because of being bullied by a kindergartner.

Trivia

 * Its unknown if her surname actually is Pants, but Greg referrers her as "Mrs. Pants".