Nemu Nemu no Mi

The Nemu Nemu no Mi, also known as the Nemu Nemu Fruit, can make anyone fall asleep. It was eaten by Noko in the game only.

Strengths and Weaknesses
This fruit's main (and only) power, as demonstrated by Noko, can hypnotize an opponent to sleep. And with the seahorse flute's power to manipulate memories it can be much powerful that it almost beat the straw hat pirates.

This fruit doesn't seem to have any specific weaknesses, aside from the standard Devil Fruit weaknesses.

But on the Anime, he didn't eat any fruit, he is a common boy controlled by the seahorse flute, who can control peoples' minds, hypnotize and control memories. In addition, he is even seen under the sea, probably because the flute may give the user some abilities to fit its purposes, like disappear in mid air. The flute is also a monster behind of all the arc's plot.

Usage
Noko mainly uses this power to put his opponents to sleep.

Reference

 * - A video showing the game where this Devil Fruit appears