List of hidden blocks in Paper Mario: The Thousand-Year Door

In Paper Mario: The Thousand-Year Door, Mario can discover hidden ? Blocks throughout the Mushroom Kingdom. Like regular ? Blocks, these invisible blocks contain coins, items, and even badges. Mario can locate them by using Ms. Mowz's field ability to search or items on the field or from hidden blocks. Mario can still uncover them himself without her, however, even before she joins his party. If Mario reveals a block containing an item or badge, then leaves and returns to the area without collecting the contents, the block will become invisible again until he does so. Some invisible blocks are used as stepping stones to reach new places or other items, such as Shine Sprites. There are 14 hidden blocks in the game. This page lists the location of each hidden block, the contents, and how to get to them.

Hidden ? Block count
This chart shows the number of hidden ? Blocks for each location, with the total amount at the bottom. Locations are listed in the order Mario visits them.

External link
Paper Mario: The Thousand-Year Door Completion Guide on GameFAQs