Nate's memories are wiped, and he gets a new Yo-kai Watch Arcane and Yo-kai Keystones. The comedic show introduces Onechanside Yo-kai, summoned by turning the Arcane leftwards with a Keystone.

The series is set before the events of Shadowside with Wazzat wiping Nate Adams's memories clean. New changes include Nate owning a Yo-kai Watch Arcane and the use of Yo-kai Keystones. The show also retains its gag comedy and humor from the original series. The new series, which is more comedy focused than the original, introduces a new form of Yo-Kai, Onechanside. Onechanside Yo kai are summoned by inserting a Yo-Kai Keystone into the Yo-Kai Watch Arcane and turning it leftwards.