Big Boo Battle - The Key to Luigi

This mission is unique to the Nintendo DS.
It's time to save Luigi! We have to be Mario for this mission. We go into Big Boo's Haunt and go up to the third floor using the Power Flower. Through the door we find the painting of Luigi. We jump inside and find ourselves on the carousel. We continuously hear Big Boo's laughter. A sign says "Big Boo's Haunt Eee hee hee... There are no exits. You may as well wander in here forever... Listen carefully. Can you hear me? If you find me, you're history. Eee hee hee..." There is a Red Coin in the carousel room. We will leave it alone for now, because we can't get all 8 at this point. There is a Red Coin mission in Goomboss Battle, but we can't them at this point either. There are four doors to choose from. If we choose correctly, we will see another area through the doorway and continue. If we choose incorrectly, we'll be sent back to the carousel to start over. In the carousel, take the door to the right. We walk into a gray room with four doors and a Mr. I. There are disappearing bridges to the center of the room and the other doors. We take the door to the left and find ourselves in another room with four doors. In the center is an item block, which we don't need right now. The floor tilts, so don't stand on it too long. We take the door on the right into a room with checkered platforms that move when we step on them. We get a 1-up on the way. We take the door on the left to continue. If you listen closely, the laughter seems to be coming from one side of the room, either the left or the right. We find ourselves in a gray room with a large dropaway bridge and three Boos. We run across it quickly, getting a 1-up in the process. At the end are a painting of Boo and more checkered platforms. We ride the checkered platforms to the top of the room, where there is a hole in the floor. We drop through to a room with a rug, checkered floor, a large mirror, and curtains. We can see Lakitu in the reflection. We approach the mirror and our reflection turns into Luigi! Big Boo, wearing a crown, appears beside us with a laugh. He says "Eee hee hee! I am Big Boo, the spookiest of all the spirits! I locked up the wimpy green mustache man. And I'll do the same to you! Eee hee hee! Since I'm a ghost, I can turn invisible in the mirror's reflection. You'll have to attack me from behind to defeat me. But you'll die of fright before that ever happens! And then you'll be one of us!" The battle starts. We take a hit from him, because he was invisible, but had a reflection in the mirror. We lined up the shot and ground-pounded him for the first hit. He fades into a blue flame and appears to us a little later, with no reflection. We easily get in the second hit. His reflection appears in the mirror and his shadow on our side. We get in the last hit and he vansihes, saying "Eee hee hee! You can never really kill a ghost! We always come back! See you again. Eee hee hee!" The key appears and our reflection turns back into Mario. The key is like the key we used to free Mario, but with Luigi's cap and an "L" in the head. We get the key and pose.
19 Coins, 6 Lives
Time to unlock the door to Luigi! We leave the courtyeard and go upstairs into the room with the locked doors. We approach the green door with the "L". We unlock the door, Mario walks in, a drum roll starts, and out flips Luigi, who flips his cap onto his head with a fanfare. We get a message: "You've rescued Luigi! Now he can pummel the enemies with panache! You'll see green caps everywhere. If you grab one in the course, you can turn into Luigi on the spot. As Luigi, you can run over water and slip through wire fences with agility." Welcome aboard, Luigi! You'll be a great addition to the team!
The next Star is Switch Star of the Bay.

Big Boo's Haunt - Ride Big Boo's Merry-Go-Round

N64
I decided to get 100 Coins in this mission. I got lots of Blue Coins from Mr. I and Boos. I also wall-jumped up to the third floor for the Blue Coin Switch. We can get more coins from the spiders outside as well as an item block and a crazy block.
Star Get #33, 100 Coins, 4 Lives
For the mission, we went into the small house to the left of the mansion. We take the elevator down to a flooded hallway. We go through two doors and find ourselves near the merry-go-round. We hear the carousel music and go through the door. There are several pictures of Boos, one of which spews fire, and the floor rotates. Boos will come out of the pictures, so we defeat them. After we kill all five, we hear a chime and Big Boo comes out. There is a slight glitch, in that before we land a ground pound, Big Boo will react as if he took a hit. We get in three hits to defeat him and the Star appears. The floor stops moving and the Star appears in front of one of the doors.
Star Get #34, 125 Coins, 6 Lives
Nintendo DS
I decided to get 100 Coins in this mission, as well. I got five from the crazy box. I got more coins from the item block and the spiders. I went through the back door to find the Boos that appear through the painting, and found one wearing a green cap. Luigi must be near! I don't need it for now, so I let it be. I got more Blue Coins from Mr. I. Another Boo in the house is wearing a green cap, and I accidentally picked it up and turned into Luigi. I took three hits from a Boo and lost the cap. In the foyer, a Bob-omb Buddy says "Green caps are all the rage now. I see them everywhere! In fact, I think I just saw one!", drawing our attention to the map. We go up to teh second floor and take out another Mr. I. Through the second door to the right, we find a Power Flower and float to the third floor. Through that door, we find a picture of Luigi! We'll deal with that a little later, but now we know where to find him. There is a Blue Coin Switch up there, as well. We leave the mansion and go to the small house to the right. We take damage from the Mr. I and defeat him for another Blue Coin. We fall through the elevator shaft (we tripped it while trying to run around Mr. I) and take damage. We go through the flooded hallways and reach the carousel. We take 5 hits from the Boos and get the 100 Coin Star.
Star Get #39, 102 Coins, 4 Lives
We take out all five Boos and Big Boo appears with the chime. Beating him is easy- we take him out with 3 ground pounds, and he glitches once. The Star appears in the doorway.
Star Get #40, 112 Coins, 6 Lives
The next Star is Secret of the Haunted Books.