Strange Sack

The Strange Sack is a brown sack from Paper Mario: The Thousand-Year Door. It is found on the 50th floor of the Pit of 100 Trials. The sack increases the number of items Mario can hold from 10 to 20.

Trivia

 * In the Japanese version, when unlocking the blue cage in the Great Tree, the game checks for and removes the Strange Sack from the player's inventory if the player has it (which will permanently prevent it from being obtained again, as there is only one in the game). Additionally, if the player has more than 10 items in their inventory when they lose the Strange Sack, they can get the normally unused Debug Badge to appear in their inventory. This does not happen in the international versions.