Monkey See, Doggie Do / Mommy Fearest - S1-E2
Audio problem: In "Mommy Fearest", Ima Goodelady asks the Powerpuff Girls where they are going. Blossom tells her they're fighting crime, Buttercup speaks and then Bubbles adds, "Duh." However, her mouth doesn't move.
Makes Zen to Me/Say Uncle - S5-E16
Audio problem: In "Makes Zen to Me", Bubbles says "What's yours?" but her mouth doesn't match the words she spoke.
The Powerpuff Girls Best Rainy Day Adventure Ever / Just Desserts - S2-E10
Plot hole: The children decided that they hated the Powerpuff girls in one day. Then how did they have supervillain costumes and a van? The mom said they had lots of time to prepare.
Buttercup: Fighting robot? For what?
Professor Utonium: So all the nerds out there will think I'm cool.
Insect Inside / Powerpuff Bluff - S1-E1
Trivia: In "Powerpuff Bluff", Dexter makes a cameo appearance when the kindergarten kids have a nap time.
Moral Decay / Meet The Beat Alls - S3-E13
Question: How much money did Buttercup make from knocking teeth out?