Grape

From the Super Mario Wiki

Grapes are a type of fruit found in the Mario series as well as on Earth.

They first appeared in Donkey Kong 64 as the weapon of Lanky Kong and later in Yoshi's Story as one of the fruit the Yoshis had to eat to clear a level. During the game, Grapes were the favorite fruit of Light Blue Yoshis and Blue Yoshis. Notice that a Purple Yoshi was going to be playable in Yoshi's Story (later taken out) and it is rumored the Purple Yoshi's favorite fruit was going to be Grape.

Grape later appears in the Donkey Kong game, Donkey Kong: Jungle Beat. In the game there is a kingdom called the Grape Kingdom. At the end of every level in the Grape Kingdom was an enormous Grape. This enormous Grape had to be eaten by Donkey Kong so he could go to the next level.

Fruits

Apple | Banana | Bean Fruit | Berry | Black Apple | Blue Apple | Blue Banana | Blue Berry | Blue Watermelon | 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