It's Party Peril for the Powerpuff Girls! What do Mojo Jojo, Him, Fuzzy Lumpkins, and the Gangreen Gang have in common? They're all major party poopers. That's what the girls discover when they throw a come-as-your-favourite-villain costume party and the real villains decide to crash! Now it's the girls vs. villains in their own backyard! it's their toughest challenge yet. Can the girls save the day...and themselves?