The Nasties

""Let's get nasty!""

- - One of the Nasties.

The Nasties, a quintet of bullies led by Slip (who is played by Jack Black) are the main villains of The Neverending Story III: Escape from Fantasia (the only film in that trilogy to have no Atreyu and to get a G-rating). There are only two female Nasties, while the rest (including the leader, Slip) are male. They have been repeating the twelfth grade and enjoy picking on the protagonist, Bastian Bux.

First, the Nasties trap Bastian in the boiler room and get expelled by the janitor for this. Later, as they are looking for Bastian in the library (where they have located him), they don't, but they do manage to find "The Neverending Story" (not knowing Bastian is hiding inside it) and they are amazed by how anything that is already happening being in the book (particularly Slip). Because of this, they decide to make bad things happen to Bastian in the story. As Mr. Koreander is coming, they leave the mess, causing him to think Bastian made the mess. While Rock Biter Jr. is staying at Bastian's house, and his father informs his wife (who, like the rest of the family, is voiced by a man) that Jr. is gone, the Nasties' effects make them fall out.

At the local shopping mall, while they are looking for the Auryn (some kind of wishing necklace), they trash the mall and turn Fantasia into a mess. As the group from Fantasia are looking for the Auryn, the Nasties find it first and turn everybody (especially Mr. Koreander and Bastian's parents [Bastian's father had remarried a divorced woman who had a daughter named Nicole]) evil. When Bastian is hit by lightning, he succumbs to the Nasties' cruel effects, but is saved by his stepsister. As the two kids go back to the mall, Bastian retrieves the Auryn and wishes for fighting moves, and fights the Nasties' leader, Slip.

The next day, it is revealed that Bastian has used the story to change the Nasties into friendly students.