During Chapter 1 of the Paper Mario: The Thousand-Year Door Switch remake, you'll be tasked with exploring and conquering Hooktail Castle. It's a tricky section of the game, filled with frogs, skeletons, puzzles, and a tough boss fight. So here's a full walkthrough.
Hooktail Castle Walkthrough | Paper Mario: The Thousand Year Door
I found myself stuck more than once on my way through Hooktail Castle in Paper Mario: The Thousand-Year Door, as there are several obstacles that don’t have obvious solutions. You’ll need to make full use of all of your skills and items along the way. Koops’ shell kick ability is especially essential here, but isn’t all that easy to use.
From the save point, go right and jump off the broken bridge. Use the stepping stones to reach the HP Plus badge under the far side of the bridge. Go back to the save point room and use the spring to bounce up to the upper level. Go right and use your paper plane ability to fly across the gap to the far side ledge.
Enter and go right. Fight or avoid the Koopa Troopas and get the Power Bounce badge from the block. Go through the next door and Koops will find what he thinks are the remains of his father. It's not his father, but this pile of Koopa bones does contain a valuable clue: "The dreaded Hooktail cannot tolerate croaking creatures that begin with 'f' and end with 'ray.'"