Dexter_s Laboratory ｜ Mandark_s Sister ｜ Cartoon Network

When Dee Dee eats an experimental cookie of Dexter's design, she grow into a giant and makes the city her dollhouse. As she destroys the whole city, it's up to Dexter to pilot his giant Robo-Dexo 2000 mecha and bring her back. Past the vaulted doors lives the smartest boy the world has ever seen, Dexter, boy genius! He's constantly creating dazzling, world-saving inventions in his secret laboratory. His big sister Dee Dee frequently wrecks his experiments. However, he has bigger problems such as his nemesis, Mandark, his brilliant rival at Huber Elementary School. Mom and Dad, of course, have no idea what their little angel is up to.