The Costume Party
S2:E12
2005
IMDb
Peppermint Fizz wants to exclude a new girl, Blueberry Muffin, because she's "different" - in the way she looks, lives, talks, etc. When a dress-up party is set-up, Strawberry gets the other kids to play a prank on Peppermint that makes her see the value in even being different.