How do you pass super Mario 64 Switch Star of the Bay?

Answer 1

First, make sure you have drained the moat downstairs (to do this, beat Bowser in the first battle to get the key to the basement). You can do this by ground-pounding the pillars.

When you drain the moat, go outside. You will now see the moat has been drained. Go near the waterfall and you will see a hole. Jump into the hole.

This is a secret level, complete with red coins and stars. Get all the way to the bottom and you will see a green ? switch. Hit it to activate the green ? boxes, which contain invisibility caps.

After this, go to Jolly Roger Bay and select the star, "Switch Star of the bay". You will need to get into the underwater cavern. Find the green ? block and hit it to become invisible. Find the yellow star switch and step on it. The star in the metal grate will become visible. If you are quick enough, break the seal and get the star in time before the switch gets unlocked or before you lose your invisiblity cap.