"So that's like...a magic book," Ron said.
"That's right," Sunset said. "I write in this, and what I write appears in its twin back in Equestria."
"So, Sunset Shimmer," Kim began, "you're from this...Equestria place too?"
"That's right," Sunset said.
"She used to be evil just like me!" Sonata said cheerfully.
"Really?" Kim asked.
Sunset sighed. "Yes, really."
Applejack grinned. "Tell 'em all about th' Fall Formal," she said.
Sunset groaned. "Really, AJ? You're still—"
"Jes' teasin' ya, girl," Applejack said.
"Sunset Shimmer turned into a demon!" Apple Bloom piped up. "A real, no-foolin' demon!"
"A demon?" Kim asked, blinking. "That's a new one."
"No, I'm pretty sure we've done demons before," Ron said. "No, wait, wait, we just did devil robots."
"Hmm...you know, I can't honestly remember if we've ever fought a demon or not," Kim said, tapping her chin thoughtfully. "We've dealt with so much weird magic stuff, I just...really don't remember." At Sunset's bemused expression, Kim explained, "Me and Ron save the world a lot. Like, at least once a week."
"Huh. How screwed is your world without the two of you?" Sunset asked.
"Pretty screwed," Ron said.
"Sorry," Sonata said sadly.
The book on the table began to glow and vibrate. Kim, Ron, and Apple Bloom stared at it.
"Okay, that's just freaky," Ron said.
"Ah know all about cell phones, but..cell books?" Apple Bloom said.
Sunset rolled her eyes and opened the book. It flipped to a page where new writing was appearing in rushed, erratic script, written in violet ink. The entire room crowded around to read...
Dear Sunset Shimmer,
I'm performing a diagnostic of the portal on my end as soon as I finish writing this to determine if there's any damage to the dimensional conduit. It should take about eight hours to perform the complete analysis. As soon as I'm satisfied everything's working the way it's supposed to, I'll write back to let you know. If the portal's functioning properly, I want you and the others to meet at the statue and wait for my signal. I'll allow Sonata Dusk to return to Equestria temporarily, under close supervision, because I want to question her directly. You should bring those others you mentioned with you. Warn them about what'll happen to them when they enter the portal. Hopefully, I'll see you in the morning.
"So...we're going world-hopping again?" Kim asked.
"Apparently," Sunset said.
Sonata gasped happily. "I get to go home! Yay!"
"Temporarily," Sunset pointed out. "She didn't say anything about letting you stay there, and I'm pretty sure you won't like what she'll do to you if you try anything."
Sonata pouted. "Oh well...even just a little while in Equestria would be nice..."
Kim smiled. "I'm sure you'll get to go back home for good, Sonata."
"Well, if'n y'all ain't goin' noplace till mornin', y'all better git some shut-eye," Applejack said.
"I'd better get home," Sunset said. "AJ, I'll call you in the morning as soon as I hear from Twilight. You can get them to the school, right?"
"Yes ma'am," Applejack said. "Come on, y'all, let's git y'all settled in..."
The next morning, after breakfast, Sunset called Applejack. "Alright y'all, it's time t' head on out."
"All systems go?" Kim asked.
Kim, Ron, and Sonata piled into the old pickup; Applejack drove them to the school. Sunset was already waiting for them when they arrived. "We may be gone a day or two," Sunset advised. She handed Applejack the journal. "Possibly longer. I'll let you know as soon as we're ready to come back...assuming we don't find a way to get these two home."
Applejack took the journal, nodding. "Ah'll keep this safe," she said. "Y'all have a safe trip."
"Thank you, Applejack," Kim said. "For everything."
"Think nothin' of it, sugarcube," Applejack said. "Good luck. Hope y'all find your way home."
The base of the statue rippled, and a small purple dog trotted out. "All clear," he said, looking around. "Everybody coming to Equestria, follow me!"
"Whoa. Talking dog. Weird."
Sunset grinned. "It's about to get a lot weirder..."