None

There is one episode where the main character hits a younger boy for being mad him for believing he stole his ball. And only a little drop of blood is shown.

Nothing violently happens on this cartoon since it''s mostly a child-friendly show.

A few insults and teasing might appear but no kinds of language.

The protagonists father smokes pipe a few times.

Nothing really frightening, the show is intended for young children. However there are episodes about fight and ghosts but they shouldn't be frightening at all and give good messages.