Patapon

With the Bent Compass, it will open up a new map, the Miracle of Lostdon! This
is where you need to go before the Desert stage, so head on over. Once the
stage begins you'll see another black tombstone, destroy it and you'll find
the Don Drum! (Taken from the FAQ)

Also, to get the miracle rain, you have to properly answer the riddle on the first hunting level. (Look at the totem pole and press he corresponding buttons.)

go do the "hunting on patata plane", mission. In the beginning of the mission you'll see a tome, press the buttons shown on the tome(triangle, circle, triangle,circle), and it will rise a bit from the ground.
You have to press the same buttons again, at the right time or it will go down again. Do this until it drops a bent compass. The bent compass will allow you to go to a new mission, where you will find the don drum.

In the hunting mission the pole do those buttons a few times and then yuo will get the bent compas and then there is a new lvl with the rain ju-ju and don drum.