Daichi: This, naturally, takes place after the latter half of Chapter 4.
Verity: She doesn't own these things.
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"Why are we here?" As they exited the woods, Mr. L had just gotten more and more irritable. "I thought you cared about the others. You know, the ones in the other direction."
"I just need three hours, and life will become easier for all of us... except any ghosts we come across." That was interesting. Still, in the back of Mr. L's mind, something pricked at him, telling him to turn around. He kept going. Because he was stubborn like that. In the absence of Paper Luigi, he'd follow his 3D counterpart and make his life hell.
Sometimes, he thought he could use a new purpose in life. Those feelings would immediately be cast aside.
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Meanwhile, in the depths of the forest...
"Big Bro!" He turned to see his little brother, followed by a 3D version of himself and a small yellow ball. The Boos chained them to the tree and left. "This is where you were!"
"Great, at least something good came out of this," the yellow ball remarked. "So this is Paper Mario? Doesn't look like much."
"Starlow, remember what we said on judging by appearances?" The 3D version of him reprimanded the ball.
"Don't do it or get zapped? Luigi's not even here right now! ...Well, at least not the one with the Thunderhand." She shook her foot. "And, either way, it's not like he can find us here! He'll never even get past the Boos!"
"He will." The other Mario stated with certainty.
"How can you be so sure of that?" Paper Luigi asked quietly.
"You see, among the Boos of the Mushroom Kingdom, my brother has a certain reputation..."
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"A vacuum cleaner?" Mr. L was not impressed. In the time that they had been traveling, he had just gotten more and more irritable.
"Not just a vacuum cleaner. This is the Poltergust 5000. One of the only things capable of containing ghosts against their will."
"If it really does that, why was it buried in your closet?"
"I didn't think I would need it! I probably didn't need to actually get it, but it reinforces the image."
"What image? I know that the moron, at least, is afraid of ghosts!" He knew that, only lead or not, this was risky. He was just didn't care about the consequences anymore. And if consequences did arise, he'd try to pass it off as not his fault. Because he was stubborn like that.
Luigi just smiled.
"The image that makes ghosts afraid of me."
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Daichi: Because this is funny. And it accentuates a core difference. Ghosts are scared of Luigi. Paper Luigi is scared of ghosts. It means that it will take more time to save the others, but it will make saving them that much easier.