Leon is night fishing on the bayou, catching fireflies in a jar under a big round orange moon - it's that kind of a film - when the light dims and he tells his pet chipmunk, "Somethin's up, Earl." Sure is - a massive catfish made out of the stars transports him, pet and inflatable, on a theme park ride to the moon where he teams up with a genuine Moongirl and giant protective cat. Mission? To reignite the moon (his jar of delights is important here) and help defend her from a pair of rascally Gargaloons.
Not that you'd expect much from this, but 'Moongirl' is an underwhelming short. It did kickstart Laika's work so that's something. It has a potentially interesting idea, but it never made an impact on me. The animation isn't all that, either.