358/2 days worlds The World That Never Was

The World That Never Was

Although never confirmed, it can be inferred from Xemnas' speeches that the World that Never Was is not an actual world, but an artificial world created by the Organization to use as a home for Nobodies. That being said, the World that Never Was would have no true heart as other worlds do, and would therefore be a Nobody itself. It may be the Nobody of the End of the World, which is a Heartless world.
This hypothesis seems to support itself through several of the structures within the world. Memory's Skyscraper, for example, appears to use the memories of others and display them on the massive television screen on its front. The world may use this in place of a heart to keep on living, the same way that Nobodies use memories of emotions to retain their sense of self, rather than a heart.