Bowser's Galaxy Reactor

The Center of the Universe is the final level in Super Mario Galaxy. Nothing is known about this level except it is accessible after the final Grand Star is located. It will feature the final battle between Mario and Bowser. It is unknown if Bowser Jr. will appear in this level. After this battle, the Center of the Universe transforms into a black hole and begins sucking in everything. Tyke is also sucked in, saddening Mario.