I'm Lisa Simpson, Who the Heck Are You?

I'm Lisa Simpson, Who the Heck Are You? is a story that appears in.

Plot
Bart happens to knock Lisa unconscious and she wakes up with amnesia. Bart makes her believe that she is the evil one in the family, and that he is the kind one, causing her to start behaving unpleasantly. However Bart quickly comes to dislike the new Lisa.