Nummskull

is a Rank E Earth-attribute Yo-kai of the Tough tribe.

Ponkotsu evolves into Rebone starting at level 28.

Appearance
Ponkotsu appears to be a skeleton Yo-kai. He has a round skull with a pink crack on top. He has yellow beady eyes with teal-colored pupils. He has a simple black body with pink stripes around his stomach. Ponkotsu also has lanky arms.

Relationships
Dazzabel is Ponkotsu's mother. They have not seen each other for quite a long time.
 * Dazzabel

Abilities and Powers
Ponkotsu can cause any electronic device to malfunction. When he inspirits a person, they can become discombobulated.

Trivia

 * It is currently unknown as to who is Ponkotsu's father is.
 * Ponkotsu is the second Yo-kai to be directly descended from a Yo-kai released during Yo-kai Watch, with the first being Hiraishin, son of Papa Bolt and Mama Aura.
 * Coincidentally, both Yo-kai hail from the Tough tribe and their parents hail from different tribes then their children's, with Dazzabel being from the Charming tribe and both Papa Bolt & Mama Aura being from the Heartful tribe.
 * Coincidentally, both Ponkotsu and Hiraishin share their respective mothers' ranks (Ponkotsu and Dazzabel are both rank E, while Hiraishin and Mama Aura are both rank A).