The BEST episodes written by Greg Colton
#1 - Save Mojo
The Powerpuff Girls - Season 5 - Episode 7
When the Powerpuff Girls try to stop Mojo from doing a crime an animal activist group comes to his rescue protesting that the Powerpuff Girls can't harm him because he's an endangered animal.
#2 - Substitute Creature
The Powerpuff Girls - Season 5 - Episode 8
When Ms. Keane gets sick she hires a substitute teacher named Mr.Green to run the class in her absence. Unfortunately because of his monstrous appearance the girls assume he's a bad guy and try to save their classmates from him.