The Neverending Story 3: Escape from Fantasia

The final chapter in the popular film trilogy stars Jason James Richter (Free Willy) as Bastian, a teenager whose life is turned upside down when his father remarries.
On his first day at a new school, Bastian is chased by a vicious gang called the Nasties, led by Slip (Jack Black, Gullivers Travels). Bastian hides in the library where he finds a magic book that writes itself according to the imagination of the reader. To escape the Nasties (and his troubles at home), Bastian wishes himself into Fantasia, the storybooks phantasmic world of incredible creatures. Its here, away from the pressures of the real world, that Bastian thinks hes safe. But when the Nasties take control of the book, his Fantasian friends get stuck on Earth, and its up to Bastian to save them.