Point Swap
From the Super Mario Wiki
A Point Swap.
Point Swaps are items found in Paper Mario: The Thousand-Year Door at the Glitzville Shop for five coins. This item will switch the player's HP and FP, and will not exceed the maximum number of points allowed for either stat. If the player uses this item with 0 FP, Mario or his partner's HP will be restored to 1 instead of 0.
[edit] Cooking
Cooking an item with Point Swap often gives the reverse counterpart.
(Ultra Shroom + Point Swap = Jammin Jelly)
