You’ll find this hidden star in Dreadnought’s third star mission. From the start, run to the underside of the saucer to find a warp pipe which will teleport you to a garbage dump. The droid here needs your help; it seems the planet’s been covered in trash, and you’ll have to blow it away within 30 seconds.
“This is a Red Star. It holds the power of the Red Lumas. But the really amazing part about it is, it allows you to fly after you spin in midair. Yes, FLY!”
Hidden Stars These Power Stars are hidden inside normal levels. Instead of completing the level as designed, you’ll have to do something different, like going in the wrong direction or feeding an out-of-the-way Hungry Luma, to collect them.
Grab the green shell from the center of the ocean floor, then launch it at the mines surrounding the nose of the sunken ship. This will cause the ship to explode revealing a Launch Star that will blast you off to another planet. The single Boo in this room is holding onto a Star.
Yoshi himself does not appear in Super Mario Galaxy (although he was planned to); however, he has three notable Yoshi references: One of the heads used to represent the player’s save file is Yoshi’s.
Loading when this answer was accepted… The silver crown means you have collected every star and the comet medal in a particular galaxy. After getting 120 stars, more things to collect unlock in each galaxy. When you collect all of those the silver crown becomes a gold crown.
Luigi is a playable character in both Super Mario Galaxy and Super Mario Galaxy 2. He is the younger twin brother of Mario. He can be unlocked when the player makes a certain progress. Luigi can jump higher and run faster than Mario, however, he stops slower.
Flying Mario and Flying Luigi are forms taken by Mario and Luigi in Super Mario Galaxy. It is first used when Mario returns to the Gateway Galaxy to collect 100 Purple Coins. Flying Mario, collecting Purple Coins at the Gateway Galaxy. Mario can only obtain this form when he grabs a Red Star.
Red Stars are power-ups in Super Mario Galaxy. Red Stars transform Mario into Flying Mario (Luigi into Flying Luigi). They wear off over time, and are only found in the second mission of the Gateway Galaxy and in specific spots of the Comet Observatory.
Grandmaster Galaxy unlocks upon getting all 120 Green Stars and depositing 9,999 Star Bits. Furthermore, the player must not have any Bronze Stars, only Gold Power Stars count.
Here’s the catch to open up the final Galaxy, you must collect 120 stars twice over (once with Mario and once with Luigi) and beat Bowser four time (Twice with each Bro, once at 60 stars+ and again at 120). You play the game from the beginning again as Luigi with zero stars.
The first place you’ll find Luigi trapped is back on the very first planet of the first galaxy. Head into any of the Good Egg Galaxy levels. As soon as you land, there will be a small house ahead of you. Use the orange pipe on the underside of the planet to get inside.
This hidden star can be found in FreezeFlame’s Galaxy’s first star mission, The Frozen Peak of Barron Bill. Proceed through the level up to the first Ice Flower (remember, grab the? Coin to make it appear). After grabbing it, quickly climb up the nearby fountains to the ledge above.
This hidden star can be found in Melty Molten Galaxy’s ‘ first star mission. Proceed through the level as normal until you land on the first of the glass planet trio. Look for a hungry Luma on the far side and feed him the Star Bits he needs for him to transform into a Launch Star. Launch from it to the next planet.
When the player starts on the beach, there will be an Undergrunt Gunner firing bubbles at the player. To defeat it, the player needs to either Ground Pound the top of the enemy’s mech or send coconuts by spinning into them a total of three times.