Freshly-Picked Tingle's Rosy Rupeeland/Deku Forest

As usual, Pinkle will contact you. When you're back in control again, head north. You'll see a plant that ought to remind you of the oysters on Sunshine Seashore. The Look-What-I-Found Kid is trapped inside, so try getting him out of the Vitampin Plant like you got Snatched Pearls out of the oysters. Pay 250 rupees for the Deku Forest map. Now head south, past the landing spot, and then west. Keep walking to find a house. This is Junglo's house and you are going to need his help to proceed on this island. Junglo is not home though, so keep walking up two stairs. Follow the path infested with small blue enemies. At the end there is a waterfall, where Junglo seems to be in trouble. Help him.