Noko appeared in 2013 video game called Yo-Kai Watch. Noko (Japanese: ツチノコ Tsuchinoko) is a Rank E Earth-attribute Yo-kai of the Slippery tribe.
As of Yo-kai Watch 4 he is a Onechanside Yo-kai of the Omamori tribe.
In the original game, Noko evolved into Bloominoko when fused with a Drop of Joy. As of Yo-kai Watch 2, Noko now evolves into Bloominoko starting at level 25.
Noko is a yellow snake-like Yo-kai that has a heart on its tail, a four leaf clover on its head, and appears to be blushing. It is a small Yo-kai (about half the height of Nathan).
As of Yo-kai Watch 2, Noko is now seen wearing a red bowtie.
Noko is said to bring good luck to those able to find it. Despite its apparent rarity, groups of Noko have been known to appear by suddenly showing up and promptly disappearing. Additionally, it has incredible speed and jumping abilities.
Noko appear to reproduce by Inspiriting their victims, giving them increasingly good fortune. Eventually, the Inspirited victim turns into a Noko.
In the anime, Whisper tells Nate that there is a rare Yo-Kai called Noko that is so rare that seeing one will make a person famous. Shortly after, Nate tells Whisper that there is a Noko in front of them, and Whisper scoffs it off, continuing to talk about how its rarity. Nate now says that they are not that rare, since another one appears along with the first one. Eventually, more and more Noko appear, only to vanish every time Whisper turns back to look. Whisper becomes so annoyed that he yells loudly, causing the Noko to fly in of him. One even falls on his head, and as he unknowingly holds one in his hand, one of the Noko gives Nate their Yo-kai medal. Whisper still does not notice any of the Noko, much to Nate's dismay.
In the anime, Nate and Whisper chase Supoor Hero downtown, until a Noko appears and defies Supoor Hero's ability to make people poor. More events occur in a similar fashion as the episode progresses, with more Noko joining in each time and possessing him. Afterwards, under their influence, Supoor Hero turns into a Noko and joins their group.