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.

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

Anime Appearance
Even not clearly stated it is shown that noko uses it's power againts Robin. And not clearly stated he was shown swiming with the seahorse flute upward that indicates he was being pulled by the seahorse flute.

Reference

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