Mushroom Ball

Mushroom Balls are items found on Mario & Luigi: Bowser's Inside Story in Toad Town at the mall. There are 16 total, each holding their own special prize if Mario or Luigi hand them to a yellow Toad with a mustache.They are found in hidden blocks or underground, and you must jump or drill to find them, respectively. Once the plumbers find the 16th, they get awarded with the item Treasure Specs.