Continuity mistake: When the girls first came out of the machine, they were actually just the size of insects, and the professor didn't need a helmet to see them, but when they was during the battle, he had to.
The Powerpuff Girls (1998)
1 mistake in Nano Of The North
Starring: Tara Strong, Tom Kenny, Elizabeth Daily, Cathy Cavadini
More quotes from The Powerpuff Girls
Boogie Frights / Abracadaver - S1-E5
Trivia: The scene of the Powerpuffs flying along the disco ball is parodied of a scene of Star Wars (episode IV). Note the PPGs having to shoot one area to explode the ball.
Major Competition / Mr. Mojo's Rising - S1-E7
Question: Exactly what did Major man say on TV that caused the PowerPuff girls to get suspicious of him?
Answer: The Mayor says he could never get to the crime scene fast enough and Major Man says "of course not, you'd have to know about the crime in advance, like I do." Major Man let it slip he knew when the crimes were going to happen (because he was setting them up).
Bishop73