The Void

The Void is an interdimensional rift in the game Super Paper Mario. Its purpose is to increasingly grow in size before it starts to consume and destroy "all worlds". The Void was caused by the bringing of the Chaos Heart, which was created by Count Bleck after marrying Bowser to Princess Peach. According to Merlon the center of The Void is where Castle Bleck is situated, or at least an area similar to such.

The Void appears as an ominous, pulsing black hole that hovers in the skies above. Its size varies depending on the dimension one is in, as each dimension is a different distance from The Void. Frequent waves of tremors indicate that The Void is becoming large enough to be destructive. When The Void finally becomes large and close enough to destroy, the tremors become earth-shattering, space begins to warp and flashes of light consume all matter, leaving behind a stark, white realm of nothingness. If a Pure Heart goes through The Void it turns to stone and cannot be placed in a Heart Pillar; only Queen Jaydes of The Underwhere can restore its power.

The only dimension to be utterly obliterated by The Void was Sammer's Kingdom, while Flipside, Flopside, Lineland, and the Land of the Cragnons only became dangerously close to destruction. The Void was closed after the Chaos Heart was destroyed by the Pure Hearts brought forward when Count Bleck and Tippi married, and Sammer's Kingdom was restored as a result. Interestingly enough, this scene depicts the Land of the Cragnons "reappearing", implying it may have been destroyed by The Void as well.

Trivia

 * Although The Void is always referred to as "The Void" (with a capital "the") in-game regardless of position in sentences, Count Bleck calls the dark hole "the Void" in Nintendo's Super Paper Mario website.
 * The Void could be seen in the Overthere, indicating that it was going to destroy the aftergame as well. What would have happened to the victims of The Void, or any characters who died in general had this dimension been destroyed is unknown.