The Powerpuff Girls S04 E05 Members Only

"Saving the world before bedtime."

The girls try to join the superhero organization, the Justice Friends, but they must prove themselves to do so by tests of strength, speed, and smarts. But the only flaw about the organization is it doesn't allow "little girls" into the group and it's centered around men. However, when an enemy attacks the organization, the girls must come to their rescue.