From the Super Mario Wiki, the Mario encyclopedia
Toad's Pants are an item found in Paper Mario: Color Splash.
They are one of four items Mario must retrieve for Justice Toad in Cherry Lake. In the third part of Cherry Lake, they can be found by going under the dock with a water-wheel, going through the opening in the wheel, and knocking the pants down from the tree.
Justice Toad describes these pants as "Mega-Splendiferous Tights, crucial for protecting my heroic hindquarters!"
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