Deep Dark Galaxy - Boo in a Box

Welcome to the Galaxy!
Mario
We land on a beach where the Ghostly Galaxy music plays. There is a Starshroom with a 1-up on top on the beach. In the center of the beach is a cannon. We hop in and aim at the Rainbow Star. We get it and land on a spherical plant crawling with pink Octoombas, run around and take them out, getting lots of Star Bits. Once the power runs out, we grab the Fire Flower and sling back down to the beach, landing on a palm tree and jumping down.
At one end of the beach is a gate flanked by two torches we must light. You may want to long-jump so you can light the torches before the power runs out. You can always use the cannon to go back to that planet to get another Fire Flower should you run out of power. Once we light the torches, the gate drops, giving us access to a pool in the back. The music changes. We dive into the pool, seeing Bloopers as we dive. There is a shelf with a Star Bit arrow, but we ignore is and dive to the bottom. We grab a shell and see a split shipwreck. We take the shell to the half that is surrounded by bombs. We fire the shell at the shipwreck and the bombs and wreck explode. This reveals a Launch Star. We must use the Launch Star before the bombs regenerate.
The Launch Star takes us out from under the planet into a purple box in space. The music played in Ghostly Galaxy's mansion plays here. There are a Boo and an Urchin inside. The Star is inside the Boo. We have no way to get the Star at this point, so we approach the wall with the pegs and use them to reach and spin the gravity arrow. The gravity switches and the Urchin and Boo follow. The Urchin will follow us around, trying to hit us. We use the spring to reach the gravity arrow and spin it again. Then, we use the water blaster to reach the gravity arrow and spin it. We land on the side of the box with a crystal. We break it to let in a beam of light and lead the Boo into it. The Boo explodes and the Star flies to the side of the cube we started on. We use the water blaster to shoot a water bubble to take us near the gravity arrow and spin it once more. We get the Star.
Star Get #85, 4 Coins, 1537 Star Bits, 11 Lives

Luigi
We land in the galaxy and talk to the Toad Brigade. Red Toad says, "We're currently on vaca... er... I mean, galactic survey duty! Please be patient with us." Green Toad says, "Cannon! Get all you can in the cannon!" We use the cannon, get the Rainbow Star, and take out the pink Octoombas. We get the Fire Flower and sling back to the beach. We light the torches and dive to the bottom of the pool. After getting the shell, we aim it at the half of the shipwreck surrounded by bombs. We launch into the box. We keep flipping around the box with the gravity arrows, until we break the crystal and let the light shine in. We lure the Boo into the light and flip to reach the Star. This took three tries because the Urchin kept killing me.
Star Get #85, 2 Coins, 1859 Star Bits, 27 Lives

Jolly Roger Bay - Plunder in the Sunken Ship

N64
In the room with the aquariums is a picture of a sunken ship. Toad stands near the door and says "The names of the Stars are also hints for finding them. They are displayed at the beginning of each course." With that in mind, we have to find the Star in the sunken ship. The underwater music plays here and there is a foggy mist over the water. We land on a small beach and see lots of water and pointy rock formations coming out of it. We swim out to deeper water and dive down, seeing a ship resting at the bottom. One of its windows is closed and the other one houses an eel. We approach the eel and it swims out of the window, hitting us. We surface for air and dove back down to the ship to find that the eel was gone. We go through the empty window into the interior of the ship. There is a pocket of air at the bow of the ship, as well as an item block, which we can't open when we're underwater. At the stern are four chests. We have to open them in a certain order: back, right, left, and center, when you face the stern of the ship. We approach each chest in order. We hear a chime and the water starts draining. To make this easier, we started swimming to the bow immediately. There are several mollusks serving as platforms to the item block. They can be tricky to navigate, so we swam as fast as we could, and landed on the second to last mollusk near the item block. For a better aim, I backflipped to the last mollusk, so I wouldn't fall and have to start from where the chests were. I hit the block for the Star.
Star Get #17, 0 Coins, 7 Lives

Nintendo DS
In the aquarium room, Toad tells us "The Star you chose at the beginning fo the course appears on the map below. The name of the Star is also a clue. You can also collect stars that don't appear on the map. Get the Stars in any order you like. Keep in mind, though... Some Stars only appear when you choose specific missions, enemies, and items. Once you've retrieved some Stars, move on to the door to the next course. Everyon'es waiting for you to save us!" We jump into the painting of the underwater bubbles to begin our next mission. A Bob-omb Buddy brings a Mario Cap on the map to our attention: "Looks like red caps are really chic. I keep seeing them around here lately." We swim into deeper water and dive. We wait safely for the eel to exit and go through the window. We find a lone chest at the bottom and approach it to open it. An air bubble appears, the chime sounds, and the water drains. Yoshi isn't as fast as Mario was in the N64, but we make it over halfway up; only 4 mollusks away. We hit the block for the Star.
Star Get #13, 2 Coins, 4 Lives
The next Star is Can the Eel Come Out to Play?