A soft snoring noise can be heard coming from a small house with a red roof and green door as Mario is resting from his recent escapade to rescue Princess Peach.
"Ah, spaghetti.' Mario says as he starts to talk in his sleep. "Ah, ravioli." He says before he snores again. "Ah, Mama Mia." He says just as a sharp knock on the door startles him out of his slumber.
"Let's go!" He says as he punches in an delirious attempt to defend himself from the non-existent threat before he hears someone knock on the door again.
"Coming!" Mario says with his usual Italian accent as he runs for the door, careful to avoid the flip panel that leads to Luigi's "secret" basement. He arrives at the door and opens it, surprised to see Twilight at the door with another Twilight, this one without glasses, by her side.
"Oh, hey-a Twilight! And uh, other Twilight?" Mario says confused as to how there could be two of them here. "What-a are you-a doing here?"
"We heard that you might know what it's like," the Twilights say unanimously.
"I might-a know what what's-a like?" Mario asks as he steps out of the house so he won't disturb Luigi.
"Having two of you." Princess Twilight explains before Sci-Twi starts to tell Mario about the other universe that connects to the other side of the Wondercolt statue. She explains to Mario that it's a universe of ponies and that the Twilight standing next to her is a princess there. Mario stops her as realization dawns on him.
"Is it anything like-a the Paper Mushroom Kingdom?" Mario asks as he walks down the small staircase and passes the blue and white mailbox as he leads the Twilights to a pipe at the edge of the clearing.
"The what?" Sci-Twi asks Mario as Princess Twilight enters the pipe and Mario moves to enter the pipe.
"The Paper Mushroom Kingdom. Luigi once happened to-a knock over a book in-a the castle that contained an entire paper version of the Mushroom Kingdom, down to the inhabitants." Mario says as he and Sci-Twi move through the pipe with Princess Twilight. "If I can, I'll try-a to bring Paper Mario out of the book to meet you," Mario says as he leads the group to the pipe that connects to the Princess's Castle. Upon exiting the pipe, Mario leads the group to the castle entrance and unlocks the door with a key. He then proceeds to lead them up three flights of stairs, opening several doors in the process, and leads them to a set of stairs that he jumped up and pulled them down by grabbing a little rope that was attached to the bottom step before he leads them up the stairs and enters the attic.
"This is-a where Luigi found the book," Mario says as he walks over to a bookshelf and pulls out a red book with a red mushroom on the cover and opens it. "Hello? Paper Mario? I have some friends who'd-a like to meet you." Mario says before a paper-thin version of himself emerges from the book. Upon touching the ground, Paper Mario looks around and notices Princess Twilight. Upon seeing her, he gets up and waves.
"Paper Mario doesn't seem to-a be able to speak," Mario says as Paper Mario nods his confirmation as he looks towards Mario and sees Sci-Twi standing behind Mario. He quickly looks back over at Princess Twilight, then back to Sci-Twi, before he jumps back with a startled expression on his face.
"Relax, Paper Mario," Mario says, attempting to calm his Paper self down. "They're like-a you and me, two versions of the same being from different universes." Paper Mario puts his hand upon his chin as he considers what Mario said, before he nods and gives a thumbs up. He turns to Sci-Twi and offers her his hand in greeting. Sci-Twi reaches over and shakes his hand, surprised that someone made of paper could actually shake hands without their hand getting crumpled up. After he finishes shaking Sci-Twi's hand, he turns to Princess Twilight and bows to her. Princess Twilight curtsies back, uncomfortable with the formality of the situation.
"Uh, Mario? Why did Paper Mario shake my hand, but bowed to my Equestrian counterpart?" Sci-Twi asks, confused.
"Well, it would appear that Paper Mario noticed-a something regal about her." Mario says as his Paper self nods vigorously in confirmation.
"Okay, but how would he be able to-" Sci-Twi starts to ask before Mario cuts her off with a stern glance. "What?"
"Like me, Paper Mario has to-a rescue Paper Princess Peach from-a being kidnapped once every other week." Mario says, explaining as he pulls out a Hammer and leans on it. "So, like-a me, he has become fairly observant, noticing things that-a most people don't. Things that have prevented many a kidnapping."
Princess Twilight interrupts Mario. "So, Paper Mario noticed something about me?"
Paper Mario nods as Mario starts to speak. "I know he-a did. Because I-a noticed it, too. There's a special energy flowing in-a you that's non-existent in-a your human counterpart." Mario says as the book that Paper Mario emerged from starts to shake. Paper Mario gets a shocked expression on his face, runs over to the book, and opens it. He looks back at the group and salutes before he jumps into the book, which closes behind him.
"Well it looks like-a duty calls," Mario comments as he turns to leave the attic, and the Twilight's follow suit. "Speaking of which, Luigi and I just finished ours, so I can accompany you around the kingdom as long as you want me to." Mario says after they exit the castle.
"That's okay, Mario." Sci-Twi says as she turns to look at her counterpart.
"Yeah, I'm going to be needing to return to Equestria soon anyways." Princess Twilight says as the group starts heading to a Warp Pipe that would lead the Twilights back to Canterlot High. "Like you said, duty calls." Princess Twilight says as she enters the pipe.
"Thanks for introducing us to your counterpart, Mario." Sci-Twi says as she steps onto the edge of the pipe.
"You're welcome, Twilight!" Mario says as he starts waving. "Maybe next time, I can introduce you two to one of my other counterparts."
"I'd like that," Sci-Twi says before she enters the pipe and disappears from the Mushroom Kingdom. Mario then turns to go home, covering his mouth as he yawns.