Collecting the treasure
After getting to the point in the level where you see Yellow Pikmin on a vine, call them and continue forward. You need at least 8 Pikmin for the treasure, so don't lose too many. Once you get to the vine, climb it, then jump on the Bouncy Mushrooms. Go left and push the iron block. Now you can get the Stuck Compass.
Hey! Pikmin logs
“Sometimes when I take the Pikmin exploring, one or two of them don't come back even when I whistle for them. If it still worked, this could be just the thing to help them with their sense of direction! I took it apart to try and get it working, but after hours of fiddling...I have to admit I have no idea what I'm doing. I've never felt so lost...”
Names in other languages