This page of IGN's Super Mario Sunshine Walkthrough covers Episode 8 of Bianco Hills. You will notice a bunch of fruit scattered around this area, used for hatching Yoshi (after you unlock him of ...
Get Yoshi, follow the mushrooms down to the entrance and open it up with Yoshi's spray. Once inside, the red coin button is just in front of you, across the gap on the block. Once you ground pound it, ...