Patzer

Zak's eyebrows and sideburns change color from black to brown throughout the movie.

In the first scene with Crysta and Magi Lune, their wings are missing.

In the cave where Zak kisses Crysta, as they are floating in the air, Crysta has some of her wet hair on her shoulder in all the close-ups, but not in the other shots.

When Pips jumps up onto Zak's stereo while trying to describe what it is, one of the camera views does not show the control buttons on the top surface.

Crysta's eyes change color throughout the movie. They vary from green, aquamarine, and blue.

A running gag is that Batty, being a bat (and thus short-sighted) keeps running into things. Yet Batty is a fruit bat: these are day animals with quite good sight, particularly useful to spot berries and fruit to feed on.

In Zak's wallet his height is given in feet. Australia uses the metric system.

Batty has a leaf-nose, while fruit bats have puppy-like ones; the only Australian bats to have leaf-noses are the carnivorous ghost bats.

When Batty says "Catches on quick, doesn't he?" the bottom of the background cel comes into view.

Stump is credited as Cheech Marin, but when Zak falls off the waterfall and is caught by Stump, it's clearly not Cheech Marin's voice as Stump. It is Tommy Chong who voices Stump, while Cheech Marin voices Root.