None. A nerdy pest sometimes makes advances toward the main female character but it is clear she wants nothing to do with him. This is all played for comedic effect.

Fantasy violence, your typical TV-Y7 level stuff. If your kids have seen the Power Rangers and you are all right with that, this show is no worse.

None, just some mild heckling and slapstick stuff.

None.

A central theme of the first season is a character's father having disappeared, which may be a bit intense for more sensitive children, but this is usually downplayed in favor of the action.