Daichi: I have read several role reversals. The idea is generally something fascinating. So, I welcome you to the Paper Jam Luigiverse! There are a few earlier points of divergence for both worlds involved, but the biggest point is that, during Paper Jam, Paper Luigi is the one who arrives at the end of the tutorial, and has Mr. L in his head, because it's fun to think about and generally ends up being funny. Not that Paper Mario isn't important, he'll eventually arrive.
Verity: We don't own the main franchise, certainly. And others have probably had similar ideas, so-
Daichi:-Where was I? Anyway, this will not be in chronological order, so to support new ideas. Anyway, it's time to begin.
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He had no clue where he was. The world seemed different, somehow, but also familiar. It was disorienting, but that didn't really bother him. It was sort of like when his brother would flip... where was Mario?
He sat up quickly, wincing at the bright light. After his eyes adjusted, he confirmed his suspicions. Whatever this place was, getting here had flipped him into 3D. There was also nobody else in sight.
So, he needed a plan. Ideally one that involved getting home. There was just one problem with that.
'You have no idea what you're doing.' That. He ignored the voice in his head. That was the default response, and mostly it was the correct one.
There was a commotion in one direction. Well, it was as good of a clue as any.
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One of them looked like him. Sort of. This one looked like he belonged in this place. He seemed more confident, too. And the other... that was his Big Bro.
'It's not him.' He knew that, just... it wasn't him, but at the same time, it was! 'That makes no sense and you know it.' The voice went ignored yet again.
Those two... they were at a disadvantage. He didn't want them to lose. He had to help. He wasn't particularly strong, but there had to be something he could do, anything!
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The floating yellow ball was called Starlow. The other two were the him and his brother of this world. That was fine. Starlow asked if there was anything they could call him in particular.
'You can use my name. Nobody would care. Most people don't even realize I exist.' No, he wasn't doing that.
This world was entirely three-dimensional, something that was new to him. In comparison, he felt flat, like... paper.
"You can call me Paper Luigi." And that was how a grand adventure began.
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Daichi: These things will be short, but hopefully catch the universe fairly well.