Onderon (Onderpants in the olde Michiel language of the ancient Beerswillerz) is located in the Japreal system. A planet of temperate jungles, it is also plagued by Dxun beasts, who escaped from the moon of the same name when it once orbited closer to Onderon. This migration, really only a quest by the Dxun beasts to fetch the latest Happy Meal toy from the well hidden McOnderon's, was misinterpreted by the natives as a threat, forcing them into building the only city of Onderon, Iziz.

Safely inside Iziz, leaving the beasts to their toy-gathering exploits, the Onderon people soon found a new way to relieve their bordom by watching a show called Beast Brother, in which the unwanted criminal element of the city were thrown outside the walls and left to fend for themselves against the Happy-Meal monsters. Unfortunately, some of the criminals discovered ways to avoid being lunch and, with the clever use of pull-back-and-go speeder toys, managed to distract the beasts long enough to create for themselves a new civilisation.

Naturally, these two groups really didn't get on. Those in Iziz missed Beast Brother, being forced into watching repeats of Alice in Onderland the soap, whilst the ex-criminal sect found pleasure in putting one over their old judges. This conflict only ended after Princess Galia married the Beastprince. Here's hoping he looked better than he sounded.