Grandfather (Codename: Kids Next Door)

So The Delight Children From Down The Lane are on presumed deceased because they were last seen in the series finale falling to there death in a big toilet.

But why are some of The Kids Next Door Villains are on Presumed Deceased? is there a reason.

Villains:

Black John Licorice

Mr.B

Chester

Jerry Rassic

Grandfather

And Crayon Boy