World 4, as viewed on its map.

World 4, also known as World 4: The Many Mysteries of the Cosmos is the fourth world in Super Mario Galaxy 2. It is located near a spiral galaxy. This galaxy has seven galaxies, with the last one being Bowser's Gravity Gauntlet. In Bowser's Gravity Gauntlet, Mario fights Giant Bowser again, however, Giant Bowser has new moves. The Hungry Luma galaxy is available from the start, which does not occur in any other world in the game. 



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