Moongirl (2005)

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.

Unfortunately the movie Moongirl is not yet available on HBO Max.