The Powerpuff Girls Best Rainy Day Adventure Ever / Just Desserts - S2-E10
Revealing mistake: When the van drives upstairs, you can see that it wasn't destroyed.
Speed Demon / Mojo Jonesin' - S2-E12
Revealing mistake: In the episode Speed Demon. When the girls are hugging each other outside the school, Blossom's eyelid on her left eye continues to vanish and pop back as she laughs.
The Powerpuff Girls Best Rainy Day Adventure Ever / Just Desserts - S2-E10
Plot hole: I don't think the police would throw the wife and children in the same jail cell as Harold.
Princess: I know you think I'm too little to own my own city, but don't worry. I won't let you down. I'll be the best little capitalist piglet Princess you ever had.
The Powerpuff Girls Best Rainy Day Adventure Ever / Just Desserts - S2-E10
Trivia: The professor drives off to the store with his blindfold on.
Moral Decay / Meet The Beat Alls - S3-E13
Question: How much money did Buttercup make from knocking teeth out?