Replica Program

The Replica Program was a planned series of experiments conducted by Vexen under Xemnas's orders, with the apparent help of Naminé. He attempted to make Replicas of Keyblade wielders Sora and Riku in the event that the original Sora proved to be useless to his plans for Kingdom Hearts. The the first replica created by the program was Xion (an anagram for "No i"). However, after Xion's defection and her death by Roxas, Xemnas discontinued the program. In the Secret Reports it mentions another inferior numberless replica that was taken to Castle Oblivion. The Secret Reports in Kingdom Hearts 358/2 Days also reveal the existence of other unused replicas.