First Appearance: Nothing Ever Happens(non-speaking cameo) Last Appearance: The Key Family Rose (mother) Max (father) Justin (big brother) Griffen (little brother) Enid (baby sister)

Sister Mouse is a mouse who lives with Kipper in his house. She was first seen in Nothing Ever Happens. She made a cameo, but first talked in The Mouse.

Appearances: Edit

Trivia Edit

  • Mouse is voiced by Megg Nicol.
  • Mouse never interacted with Tiger, Pig, Arnold, and Jake.