Grand Star

A Grand Star is an item found in the Wii video game Super Mario Galaxy. In the game, either Mario or Luigi, depending on the character you were playing as, would have to find at least five of seven Power Stars in order to save Princess Peach from the clutches of the antagonistic Bowser. Once completed, he was then allowed to find the remaining two, or even do so before saving her.

Grand Stars resemble an enlarged Power Star (note: hundreds of Power Stars are featured in the game). They're much more powerful and are used to give the Observatory enough power to head to the center of the universe where Bowser was stationed. After defeating him in a climatic battle, Mario or Luigi would save Princess Peach and head back to the Mushroom Kingdom, though the player would be allowed to find the remaning Power and Grand Stars if they wished.

List of Grand Stars

 * One Grand Star is found in the very beginning of the game in the Gateway Galaxy.
 * After defeating Megaleg, either of the brothers will get a Grand Star.
 * The third can be found when you complete the event called "Bowser's Star Reactor".
 * The fourth is held by Bowser Jr.
 * The fifth can be found when you complete the event called "Bowser's Dark Matter Plant".
 * The sixth is found in Bowser Jr.'s Lava Reactor.
 * The seventh can be obtained when you complete the event called "The Center of the Universe".