The Mouse Princess

The Mouse Princess is a direct to television special. It is a combination of the Thorn Valley Chronicles episodes (The Wasteland - Lorax to the Rescue - The Last Truffula Tree and A New Tree).

Mrs. Brisby encountered an old friend of hers from the past. The Once-Ler. He tells her the story of his relationship with The Lorax and when he was tricked by his evil mother to destroy The Truffula Forest. Mrs. Brisby remembered that her parents Bernard and Bianca never met The Lorax. With help from The Once-Ler - She decided to plant the last truffula seed which can make The Lorax come back.

An unofficial sequel called The Mouse Princess 2 took place some years after the first story.