There is a statement in the closing credits: "No apes, monkeys, or talking dogs were injured during the making of this film".
This Cartoon Network theatrical feature has a special Cartoon Network logo: all the Hanna-Barbara/Cartoon Network characters are seated in a movie theater (the Powerpuff Girls and Mojo Jojo in front). The theater gets dark, and all that is seen are the characters' eyes, which form the Cartoon Network logo.
The title doesn't appear until after the opening credits.