The Island of Imagination is surrounded by a millennium jungle. It is inhabited by animals who were freed by Classic Yoyo, Classic Bibou and Classic Gluglu during the events of Les Pyjamasques au zoo. It contains a wooden totem that has been there for centuries, and marks a resemblance to the original counterparts of the Pyjamasques' costumes.
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 Totem Animals (after a rough encounter with Rude Horn). The second time, Utupë needed Les Pyjamasques' help to protect the Dreamer of the Rainbow from Original Roméo capturing it with his bulldozer to destroy the forest and use it for his experiments.