Cosmic Mario is a character that appears in Super Mario Galaxy. His physical shape is identical to Mario, while his outer appearance is blue with stars all over, as if he were made of cosmic matter. He also has an unusually high-pitched voice. If Mario or Luigi enters a galaxy when a Cosmic Comet is orbiting a galaxy, Cosmic Mario appears at the beginning at the level and challenges the player to a race. The player must then race through numerous obstacles and reach the Power Star before Cosmic Mario does. If Cosmic Mario manages to reach the Power Star first, Mario will lose a life and must restart the race. Colliding with him during the race causes him to release Star Bits.
If the player is playing as Luigi, Cosmic Luigi will appear in place of Cosmic Mario. Cosmic Luigi uses more shortcuts, such as long jumps. As a result, he is faster and much more difficult to beat than Cosmic Mario.
A similar entity based on Cosmic Mario appear in Super Mario Galaxy 2 and Super Mario 3D Land in the form of the Cosmic Clones. Other entities are the Cosmic Spirit from Super Mario Galaxy 2 and Mummy-Me from Captain Toad: Treasure Tracker.
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