Nechigaeru YW5-023 This article is a stub.

You can help Yo-kai Watch Wiki by expanding it.

Beddy-Byes (Japanese: ベッティーさん Bettī-san) is a Boss Yo-kai that first appeared in Yo-kai Watch 3.

In Yo-kai Watch: Wibble Wobble she is a Rank SS Yo-kai of the Heartful tribe.



Beddy-Byes is a large humanoid Yo-kai with blue skin and blonde, braided hair, wearing what appears to be a pink night gown.

She has mismatching eyes, with her right one being much larger than the left, and their colors being different as well. Her right eye has a red iris and a white sclera, while her left one has a blue iris and a red sclera. She doesn't have a nose. There are many freckles on her face, and her large mouth is filled with sharp teeth.

Similar to her eyes, her right arm is a lot bigger than her left, the latter of which she uses to hold up the bed under which she appears. She is accompanied by both a floating alarm clock and plush toy.

Beddy-Byes has a very caring personality, ultimately just trying to keep her children safe and happy. She can however get aggressive and harm people while doing so.

Beddy-Byes possesses great physical strength, mostly attacking by hitting opponents with her large right hand. Adding to that, she has the ability to breathe ice storms, and summon various toys from below her bed to launch at her opponents. When she is sleeping, she can restore her HP through having a peaceful dream, and she can also curse Yo-kai to lower their defense.

Beddy-Byes is a manifestation of Elizabeth Hazeltine's feelings, who is Wyatt's and Dorothy's mother. During a time where she was sick, a lot of pressure was put on Wyatt, causing him to develop the habit of staying a way from home for long periods of time. Afterwards, while on a business trip alongside the children's father, her feelings of concern for them grew so large, Beddy-Byes was created and appeared back in the family's mansion to protect the children.


Yo-kai Watch 3

Beddy-Byes appears in Chapter 7, where she inspirits Dorothy and lures in Nate and the others inside Dorothy's room, with the intention of having them safely play together.

The group ends up fighting her, believing her to be an evil Yo-kai, or in Wyatt's case, an evil alien. It is after this fight that the fact that Wyatt is Dorothy's younger brother is revealed to Nate and the others. Wanting to protect his sister, Wyatt tries to attack Beddy-Byes, but Dorothy stops him, and asks Beddy-Byes if she is actually their mother.

With her identity revealed, Beddy-Byes has a talk with her children, both with her apologizing for what happened, and Wyatt apologizing for staying away from home so late. He promises to be good, and Beddy-Byes retreats, satisfied.

Afterwards, Dorothy muses they should write their mother a letter, causing Hailey and the others to be shocked to learn that their mother is in fact still alive, despite having brought forth a Yo-kai.

Game Data


"Betty-san" is Betty, a Western name, with the honorific suffix, -san added. Betty might also be derived from bed'. It is also a diminutive of "Elizabeth", her human name.

"Beddy-Byes" is derived from the translation of "Beddy-Bye" a baby-talk word meaning Bedtime.

"Nocturnia" is a corruption of "Nocturna" (night).


She is based on a monster under the bed. Her appearance in Yo-kai Watch 3 also features references to the movie The Excorcist, so she might be inspired by the concept of a demon possessing children.


In other languages

Language Name Meaning
Flag of Japan Japanese ベッティーさん Bettī-san
Flag of France French Dodorothée
Flag of Spain Spanish Nocturnia
Flag of Germany German Weiabetti
Flag of Italy Italian Letterribilia