After you beat Runi you have access to that other world thing. In there you have to go around all the way. On the other side you will find a portal and checkpoint flowers. If you go a little further after that you will come across a shack. oosk and doord will ask you to clean it of bugs. If you've done that they will fight you.
Tymbal is in the rooftops area (it's called cicada grove) and can be accessed from the (I believe second) big tree. It's a cave fairly high up. Foraz is in the Hive. You can either enter it through a purple looking hive thing on the Old Road or the purple hive thing in the rooftops area.
