Big Pikmin Grower:
In the impact site, bomb-rock the wall next to the stump. Take blue Pikmin out and go there. There are some clams that have pearls worth 50 sprouts and one has a part. Just throw a couple in the mouths. When they start to open their mouths, call them back. It may be a bit slow, but it's worth it!

View Fireworks:
Press Down (on the D-Pad) for 4 Pikmin to carry you back to base. You'll see a fireworks display held just for you