Tanisha "The Creature" Dewey is Duncan's older sister who is called The Creature. She is bratty and annoying, and is secretly jealous of her younger brother, Duncan, because he gets so much attention.
Relationship to Other CharactersEdit
Duncan "Gluestick" Dewey
Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.