Dexter's Laboratory

Dexter's Laboratory (1996) is a animation, comedy, sci-fi & fantasy with 4 seasons created by Genndy Tartakovsky, rated 7.7/10.

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.