Gateway Galaxy

Star #1: Grand Star Rescue
While Mario is laying on a patch of flower, the Luma that Peach was holding earlier tries to wake Mario up. When Mario does wake up, the Luma goes around him, and the camera pans out, showing that the planet was the first planet of Gateway Galaxy. The Luma later transforms into a Star Bunny and says, "Finally! You're awake! Let's play." Later, you need to follow the Star Bunny until you go to another patch of flowers, with 2 other Star Bunnies. Once you reach the flowers, the Star Bunny will say, "Let's play hide-and-seek! If you catch all of us, we'll tell you about where you are." Before they vanish. Then, you go to a fortress-like area to meet Rosalina, which will say, "I've been watching you from here. This place is called the gateway to the starry sky... My name is Rosalina. I watch over and protect the cosmos. To save your special one, you'll need the power to travel through space." Then, Rosalina will give you a Luma, saying, "Luma can give you this power, I will entrust you with his care." Then Luma gets inside of Mario, giving him the ability to spin. Then, Rosalina says, "Disaster has struck us, just as it has visited you. With Luma, I hope you can rescue the Grand Stars. May the stars shine down on you."
 * Star Bunny #1: This bunny is hiding in the pipe.
 * Star Bunny #2: The bunny is hiding in the grass.
 * Star Bunny #3: This bunny is hiding in the crater. This bunny will say, "I can't believe I let myself get caught! Wow! You caught all of us? Maybe you really can help Mama..."

A Luma says, "Shake (Wii Remote) to spin into things that look breakable! You can even spin enemies to stun them." Once you break the big crystals in front of you, he will say, "This is a Launch Star. Shake (Wii Remote) when you're near one to shoot through space like a comet! Now go and explore the universe! There are lots and lots of galaxies for you to discover! After you are done talking, go to the Launch Star to launch to the next planet. A luma says, "Hi there! Good to see you! I have some bad news, though. See, I had a Launch Star all ready for you, but a meteor smashed it up! You can't leave without it, so find all the Star Chips to fix it. Oh, and be sure not to fall in the black hole!".
 * Star Chip #1: Near a rock.

Once you get all 5 Star Chips, go to the Launch Star to launch to the next planet. This planet has a bunch of small Goombas, but talk to a Luma, which will say, "Get me out of here! One of those enemies should have the key! You can shake (Wii Remote) to spin them around and make them dizzy. Once they're stunned, just run into them!". Once you hit the right Goomba, and get the key, talk to the freed Luma, which will say, "Thanks! Would you mind rescuing my buddy in that base up there too? I'll transform into a Sling Star. Just jump into me after I... TRANSFORM!", right before he transforms into so.
 * Star Chip #2: It is in a crystal.
 * Star Chip #3: It is where the Launch Star will be.
 * Star Chip #4: Near an edge.
 * Star Chip #5: On a small rock.

Once you go to the next planet, go to the other side of the planet, and defeat a giant Goomba, which will give you the key, and once you go back, the Luma will say, "Hurry! Down here!". After going down, the Luma will say, "We've been waiting for you! That's a Grand Star! We have to save it! They're using the Grand Star to power that awful machine. It looks like it's making...something. We have to do something before the Grand Star's power is drained! Quick! Find a way to stop that terrible machine!". In order to stop the machine, you must change all the switch panels from yellow to blue, making the machine disappear. After that, get the Grand Star, making the power of the Comet Observatory increase.

In a cutscene, Mario walks towards Rosalina, with the brown Luma saying, "The beacon is lit again! It shines weakly, maybe only as bright as a Class 6 Star, but at least the poor Lumas will survive now." Then Rosalina says, "Oh, thank you for saving the Grand Star. These star people are my family... They mean so much to me." When Rosalina turns around, she will say, "Welcome to the Comet Observatory. It's my home, and home to the Lumas."

"You see, we travel the starry skies. We pass by this area once every 100 years, but we suddenly stopped in front of this planet. A strange force had latched on to our ship, pulling away Star Bits and our power source, Power Stars. Our ship had lost power, so it entered a deep hibernation state in which it could not move. Those who took your special one picked up the Power Stars... And discovered the power to cross the universe. Please, I have a request... This observatory uses Star Power to project images of the galaxies that are scattered across space. And...there is a chance we can use our few remaining stars to look for other Power Stars. These round rooms are called domes. We observe galaxies from domes such as these. But the only one that is working now, powered by the Star Power you restored, is this one...the Terrace. Please go to the Terrace and try to recover the Power Stars from the galaxies you can see from there."

Then, the brown Luma will say, "If we do that, we'll be able to restore the Comet Observatory's ability to fly like a starship. Then perhaps we can pursue the theives who ran off with the Power Stars.