The forest is a place full of trees. Sometimes characters come here. In the First Movie, Mario and Kermit had to fight with their armys. The fights took place here. In 'Quest for the Mushroom', Mario and Luigi ride a bike here. They were climbing trees. In 'Mystery of the Stolen Hat', Mario and Luigi go through the School of Doom and here. In 'Summer Fun 2', Mario, Luigi and Jack have a camp here.