Collect all Buccanary coins

What are you doing, Owlboy?!

Clear the Boguin's Cannon Challenge

Rescue the Boguin Brothers, enjoy your explosive surprise

Defeated the Molten Guardian

Beat Geddy 1000 times

Learn how to cope with the heat in Toby's hot spring

Escaped the Frog Guardian

Obtain the Strange Device

Had 10 moneybanks at once

Found a certain weapon before getting a sword. (Page 38)

Found Secret Treasure #2

Found Secret Treasure #12