Voxelverse (formerly known as Pixelverse) is a second generation verse. In that verse, everything is made of voxels. Mr. Voxel comes from this verse.
Before, this place was once Pixelverse, where everything was pixelated. Unfortunately, this verse's history is long forgotten, it never made it to Joeschool's books. The reason why it changed was that Joe was developing a bomb made of pixels, when the pixels linked together and formed a voxel. It was dropped on Pixelverse, and it turned into Voxelverse (the explosion was very powerful).