The Rugrats were really a figment of Angelica's imagination. Chuckie died a long time ago along with this mother, that's why Chaz is a nervous wreck all the time. Tommy was a stillborn, that's why Stu is constantly in the basement making toys for the son who never had a chance to live, and the DeVilles had an abortion, Angelica couldn't figure whether it would be a boy or a girl, thus creating the twins. amirite?