Dexter's Laboratory (1996)
Dexter, a boy-genius with a secret laboratory, constantly battles his sister Dee Dee, who always gains access despite his best efforts to keep her out, as well as his arch-rival and neighbor, Mandark.
Cast: Candi Milo, Kat Cressida, Jeff Bennett, Kath Soucie
Ended 4 seasons 220 episodes Cartoon Network