Fecal matter seems to play a funny if significant role in this game. Poopies deal two points of heartache and there is a 60% chance of finding Poopie when you look through trash cans. Some areas offer only Poopie such as in the hen house near Julie Arashiyama's bar and grill (though a single Cold Sweet Potato can be found at the back exactly once).
At Scarecrow Field, Poopie is a prominent find throughout the rice fields. When not finding Star Seeds, Poopies will be found instead. The manure bin offers 99% Poopies/Big Poopies/Huge Poopies. Huge Poopies deal 18 points of damage. The last 1% is reserved for a "Chin Film" and becomes 0% when the film is found.
At Worldly Desire Temple, things get dangerous as Big Poopies are by far the most common find among the Bamboo Forestry. In the trashcan behind the temple, Big Poopie makes a repeated appearance as well. Big Poopies deal six points of heartache.
At the Funny Bone Factory, it is possible to find a Gold Poopie which can be sold for substantial Z. This only occurs when the Lazy Security Guard appears at 830 "the new factory site." It does 18 points of damage. Outside the factory, in the grassy areas, Big Poopies can be found.