A rainbow snail shell that makes wishes come true?!

So, have you found out anything about the author of Legend of the Snail? Whoa... really? You got to know about Mano while investigating about Alloy. Great! Then the only thing left for you to do is go to the thicket around the beach to defeat Mano and bring back 虹色デンデンの殻.

Hahaha! Oh good. I'll soon have 虹色デンデンの殻 all to myself. What should I wish for?

What?! You don't want to go?! Think this over one more time. I'm willing to share 虹色デンデンの殻 with you!