The No-fruit is a transforming fruit. The No-fruit's first and only appearance was in the episode "Froggy Apple Crumple Thumpkin" and is the first fruit ever shown on the show. Chowder, Shnitzel, and Mung were making the dish, Froggy Apple Crumple Thumpkin. Once a leaf is plucked off of the No-fruit, the fruit transforms rapidly to different fruits. The transformation can ONLY stop when hit. When Chowder ate the fruit when the leaf was not yet plucked, he compla
ined that it had no flavor. But once the No-fruit transforms, it takes on the flavor of whatever fruit it becomes, only more flavorful as Chowder described an apple as,"super appley".
In the scene where they hit all the No-fruit, Mung Daal's way of plucking the leaves would of just pulled all the No-fruits to him. (Unless they were glued onto the table.)