B3-NK1 appeared in 2013 video game called Yo-Kai Watch. B3-NK1 (Japanese: からくりベンケイ Karakuri Benkei) is a Rank B Lightning-attribute Yo-kai of the Brave tribe.
B3-NK1 wears a yellow armor with purple shoulder-neck and waist pads, a number of blue beads and black gloves with gold linings. He has green facial features. He also carries a naginata.
In the anime, he is eager and hard-working in his quest for the "Hero's Screw", which he believes he could awake the true power of his naginata.
He is a powerful robot Yō-kai who breaks machines and steals their screws. He keeps unscrupulous car companies in business. Not to mention the powerful screw lobby.