If you loved Regular Show: The Movie, try Invader Zim: Enter the Florpus
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Theyboth carry the playful mood tag, and they sit in Animation / Comedy / Science Fiction territory. If that's the register that drew you to Regular Show: The Movie, the second film will land in a comparable space — through a different lens.
playful
What Invader Zim: Enter the Florpus is
Here's a film that knows exactly what it is. When Zim realizes the Almighty Tallest aren't coming to Earth, he mopes, giving Dib the chance to expose him. It's pretty much what fans wanted.

