Dexter's Laboratory - Season 5

When Dexter creates a new invention to get DeeDee’s rudeness under control, her foolish antics cause both her and Dexter to end up in the machine, resulting in them becoming polite, and their rude, evil counterparts being made. Now, the polite Dexter and DeeDee must find a way to rid of the disrespectful clones of themselves before they cause even more trouble.