Mirror World (Empath stories)

The Mirror World is a place that exists in the EMPATH: The Luckiest Smurf as the place that Vanity's "twin brother" Century came from. It is very identical to the normal world, except that everything exists simply as a mirrored copy of the normal world. In the events that took place in the cartoon show episode "The Hundredth Smurf", Century was magically pulled from the Mirror World into the normal world through a bolt of lightning that struck Vanity's mirror, though at that point he existed merely as a living mirror copy of Vanity. Later, a second lightning bolt that struck the mirror caused Century to become a normal Smurf instead of being a living mirror copy, having all the memories of his "brother" right up to that moment.

During the events of "Vanity's Double", when Century felt like he wanted to return to being a reflection in the mirror, Papa Smurf confessed that he doesn't know of a way that he can return Century back to being what he was, but tells him that if he were to find a way to restore Century to just being a reflection, he would cease being the Smurf that he became. From that point on, Century adjusted to his new life as Vanity's "twin brother" and even enjoyed it.

This is not to be confused with the Mirror Universe, where everything exists as the moral opposite of its normal universe counterparts.