Golden Sun/Kolima

After passing through the barricade, you will find Kolima waiting on the other side. Upon entering, a rather lengthy cutscene will take place, where the source of the town's curse and how your party can help to break it. Since everyone is currently a tree, there's not much to do here. Explore the town as you want, be sure to check all the barrels as usual, and you can also use Ivan's Mind Read to actually hear what the residents who have become trees are thinking. Also, when you attempt to exit the town, you will see a Venus Djinn trapped in someone's backyard. You can't reach it yet, so just go on. When you do this, head northwest to reach Kolima Forest.