Black Apple

From the Super Mario Wiki

A Black Apple is an item in Super Paper Mario. It restores one HP and cures poison. The player can find it on a tree in Overthere Stair. The Black Apple is also the cure for Princess Peach after she eats the Golden Apple, other than that, it's completely worthless. The Black Apple tastes very weird and nasty (it's because of that it managed to wake up Peach - and a rude awakening at that).

Fruits

Apple | Banana | Bean Fruit | Berry | Black Apple | Blue Apple | Blue Banana | Blue Berry | Bubble Berry | Cherry | Coconut | Crystal Berry | Dried Fruit | Durian | Giant Banana | Golden Apple | Grape | Green Banana | Heart Fruit | Keel Mango | Lemon | Lime | Mella Yella | Melon | Papaya | Peach | Peachy Peach | Pineapple | Pink Apple | Primordial Fruit | Red Apple | Red Berry | Red Watermelon | Star Fruit | Strawberry | Watermelon | Yellow Apple | Yellow Berry