Black Hole

When Galaxy Steve started freaking out over the appearance of Ghost Steve, He exploded into a black hole, Creating an entirely new and different reality. Oddly, whenever any steve, other than Sabre, as he isn't from that world, goes inside, they get equiped with entirely new memories and personalities. It is like a parrelel reality. The only issue with this, however, is that the dimension was slowly closing in on itself. This can be shown by lightning throughout the episodes, which goes more and more frequent as time goes by.