Île Imaginaire, literally known as Imaginary Island, is a location first seen in the book "Les Pyjamasques au zoo".
The Imaginary Island is surrounded by a millennium jungle. It is inhabited by animals who were freed by Yoyo, Bibou and Gluglu during the events of "Les Pyjamasques au zoo". It contains a wooden totem that has been there for centuries, and bears a striking resemblance to the Pyjamasques' costumes.
Outside the jungle, it contains a sloth hanging at a tangible rainbow known as the Dreamer of the Rainbow.
In the Series
On their first visit to the Island of Imagination, Les Pyjamasques have to help Utupë on getting back to his home, then he decided to show the Pyjamasques some secrets and discoveries that have connections to them such as the wooden totem and the Animal Totems (after a rough encounter with Rude Horn). The second time, Utupë needed Les Pyjamasques' help to protect the Dreamer of the Rainbow from Roméo Mécano capturing it with his bulldozer to destroy the forest and use it for his experiments.