Dexter has created the ultimate invention - The Clone-a-matic - but his older sister Dee Dee has meddled again and accidentally cloned herself. And, there"s not just one of her. Dexter"s Laboratory is infested with mini-Dee Dee"s bent on destroying Dexter"s wonderful experiments - what a nightmare! It"s up to players to help Dexter catch the Dee Dee"s, put his lab back to normal, and get Dee Dee back to her single self before Mom calls for dinner.