Soon, everyone told the Alicorn sisters everything.
"I am not familiar with the exact spell that could've erased your friends' memories, but it sounds like Equestrian Magic is at work in your world." Celestia replied.
"Hmm... Indeed," Luna agreed while Sunset tried to stifle a giggle to her speaking. "The toilings of this nefarious enchantment could portend unimaginable catastrophe if left unchecked."
Atticus, Patch, and Cherry were even having trouble not laughing. Twilight slapped them slightly with her wing to make them stop. Luna glanced at them all oddly.
"Sorry," Sunset replied. "We're just used to hearing you say no student parking in the faculty lot."
"Well said." Patch said.
"This 'faculty lot' you speak of sounds like a place of great power." Luna replied.
The others soon giggled to that, and even Twilight giggled with them.
"The answers you seek are in the Canterlot Library." Celestia informed.
"Cool." Patch said.
They soon left the palace and went into the library of Canterlot. Of course, there were many ponies going about and reading.
"There's over a million books in here." Sunset muttered.
"I wish! But don't worry," Twilight beamed. "You're looking at somepony who knows this place like the back of her hoof."
"Of course you do." Atticus smirked playfully.
Celestia soon walked off on her own.
"Where are you going, Princess Celestia?" Atticus asked.
"To the restricted section." Celestia informed.
"There's a restricted section?" Twilight squeed out of excitement.
"Breathe, Twilight." Sunset chuckled.
Celestia and Luna came to one bookshelf and moved two books back to reveal a secret passageway.
"Cool." Patch smiled.
Twilight's jaw dropped merely in amazement. Atticus had the same reaction as Twilight. Sunset and Patch simply shut both their mouths. They soon followed the Alicorn princesses before going to doors that needed to be open.
The two used their horns and they soon walked through the doors, and where they saw what looked like thousands and thousands of books.
"Oh-my-gosh-oh-my-gosh-oh-my-gosh-oh-my-gosh-oh-my-gosh!" Twilight squeaked out after a rather prolonged gasp. "So many books all unread! Ancient historical artifacts! I just... I thought...! I can't...!"
Cherry simply smirked at Twilight's reaction.
"This is like Heaven for Twilight." Atticus smirked playfully.
"Us too when we were kids." Cherry smirked back.
They soon looked through the books to find a solution, and where it almost seemed like there wasn't a solution due to how many books they went through.
"Did you know Chancellor Puddinghead tried to pass a law mandating Earth ponies drink carrot juice at every meal?" Sunset yawned tiredly after looking through a gigantic book and closed it with her horn's magic. "I do. Know that. Now."
"Ugh! We are never going to find a solution!" Patch groaned.
"Awww, sounds like you got to read all the fun books," Twilight smiled before yawning. "We should probably take a break from looking..."
"But there has got to be a solution in one of these books or scrolls." Atticus said.
"Well, actually, I found something!" Twilight grinned before bringing over a treasure chest. "You're familiar with The Seven Trials of Clover the Clever?"
The others except for Sunset shrugged.
"Well, first of all, these date back to before the founding of Equestria," Twilight informed as she opened the chest and brought out an ancient scroll. "Look at this."
"This might be the solution we're looking for." Atticus smiled.
"'The Memory Stone'..." Cherry read aloud. "Oh, yeah, Princess Luna told me about this when we met Captain Zoom."
"Well, for those who don't know much about it; do you mind if we learn about it?" Twilight asked.
"Go ahead..." Cherry replied. "It'll be a learning experience for all of us and you and Atticus love to learn."
Twilight soon opened the scroll.
"Well, it sounds promising." Sunset replied.
"It belonged to an evil sorceress who was practically invincible," Twilight educated. "With the Memory Stone, she could erase any memory from anypony. Even fragments of memories."
"Whoa." Patch said.
"Fragments like... Memories of me being nice?" Sunset asked.
"Mm-hmm, Clover the Clever knew the sorceress had to be stopped and the Stone destroyed, so he chased her across land and sea," Twilight nodded. "But every time he got close, the sorceress would erase his memory and escape. But he kept finding her."
"Whoa." Atticus said.
"But... How?" Sunset asked.
"These scraps of parchment," Twilight informed. "He secretly wrote everything down so he'd know what had happened and where to go next. Like a trail of bread crumbs."
"How clever," Cherry said before her eyes widened and she face-hoofed herself. "Right... Clever... Clover the Clever."
"He certainly got his name from his smarts." Atticus said.
"What happened on the other side of this portal?" Sunset soon asked.
Twilight spun the scroll only for the last page to be ripped out.
"The last page is missing!" Patch panicked.
"Clover must've hid it to keep anypony else from finding the Memory Stone," Twilight's eyes widened before looking to the others. "Guys, what if the Memory Stone ended up in your world?"
"Yeah, and is being used by someone in the school." Atticus said.
"And someone is using it to make everyone hate me again?" Sunset asked.
"But who?" Both she and Twilight wondered.
"That's the mystery." Atticus said.
Back on the beach...
"We've been out here a while," Pinkie said before putting on more sunscreen from a cupcake. "Time to reapply!"
"I believe in Atticus, but it does seem forever..." Mo said as even Angel was panting due to the hot sun.
"Let's hurry up before I become a hot dog." Angel panted.
"I've been thinking... Should we be worried about Sunset Shimmer?" Sci-Twi replied as Mo decided to get Angel's leash on so that they could go back home.
"Yeah! Worried she comes back!" Trixie told Sci-Twi. "I think it's a shame the way she's treating you, pretending to be your friend. She's obviously up to something. Sunset thinks the whole school exists just to serve her," she then snapped to Snips and Snails before continuing to the others. "Water, please! ou know, seeing as how the yearbook president seems to be having a little identity crisis, I believe that means the vice president takes over. And, why, that's you, Rarity!"
"We're not in the mood, Trixie." Mo said.
"If this is your way of asking to be made 'The Greatest and Most Powerful', the answer is no," Rarity said to Trixie. "And didn't we have this conversation yesterday? I can't quite remember."
The other girls looked just as confused.
"What did happen yesterday?" Angel asked Mo.
"The last thing I remember was helping JJ with some of his homework..." Mo shrugged. "Then again, I do that every night."
"Maybe we should ask Atticus, Patch, and Cherry when they get back." Angel said.
"Maybe we did, maybe we didn't," Trixie smirked innocently. "Memory is such a fickle thing. You never know when you'll forget something important. Like how Great and Powerful I am, which is why I need to be in the yearbook!"
"I'll think about it." Rarity groaned.
"That's all I ask." Trixie replied.
"We are never doing that." Mo whispered to Rarity.
"Mo, can we go home, please?" Angel begged.
"Oh, girl, you're really hot..." Mo frowned as she felt her dog's forehead. "Come on, let's get you home."
"Yes, please." Angel frowned back.
"Sorry, guys, I gotta go," Mo told the others. "Angel might get heat stroke."
The others told them goodbye as they soon left the beach, and where soon enough, Atticus, Cherry, Patch, and Sunset arrived back on Earth.
"We should be getting back to our world," Sunset told Princess Twilight. "Maybe I can convince our friends I'm telling the truth, now that I know what we're looking for."
"The Memory Stone," Twilight replied. "I'll stay here and search the restricted section top to bottom until I find a way to get your friends' memories back."
"Well, it's just good to know that she has a great teacher to help her out with this situation." Atticus said.
"Oh, Atticus, how kind." Twilight giggled with a small snort.
"Are you saying I'm not a good teacher?" Celestia asked Atticus.
The others got nervous.
"Oh, uh, I didn't mean it like that!" Atticus yelped slightly. "What I meant to say was-"
Celestia looked firm to him before she soon let out a goodhearted laugh.
"Huh?" Atticus asked out of confusion.
"Princess Celestia has a sense of humor?" Sunset asked. "Looks like I'm not the only one who's changed."
"Looks like it." Patch smiled.
Everyone soon joined in on a laugh before it was time to leave Equestria.
Once back on Earth, everyone rushed to the beach as quickly as they could, and the others were still there, except for Angel and Mo.
"Alright, time to convince them." Atticus said.
They soon made it to the beach, but looked wore out.
"Great news, guys!" Sunset panted as she made it to the beach first. "I figured it out. Someone's erased your memory with Equestrian magic! You don't remember, but we're still friends!"
The others just glanced at her in silence.
"She's telling the truth!" Atticus told them.
"This is the Memory Stone," Sunset said as she brought out a picture from her phone. "Do you recognize it?"
The girls were still silent and disturbed by Sunset talking to them.
"This isn't working!" Cherry told the others.
"Can this get any worse?" Patch groaned.
"Oh, please," Trixie rolled her eyes as she came with Snips and Snails. "This is the same girl who made flawless fake photos of your friend trashing the gym."
"Yeah, wait a minute!" Pinkie Pie said as she soon took Sunset's phone, seeing she made a rather aggressive pout. "Is this supposed to be me making such a ridiculous face? Ha! I'd never fake a face like that!" she then said, but soon made said face before yelling at Sunset. "Preposterous! Fake, I say!"
"Trixie, why are you here?!" Patch barked, ready to chase her and the troublemakers away.
Snips and Snails shivered nervously from Patch.
"Oh, no worries, my work here is done," Trixie giggled. "Trixie, out!"
"I am so going to strangle her!" Cherry glared.
"Chill, Cherry." Atticus said nervously.
"And don't forget, Rarity!" Trixie quickly added. "You promised to put me in the yearbook!"
"We never agreed to that!" Mo glared.
Trixie tried to use a smoke bomb.
"She's gone!" Cherry said before finding Trixie on the stairs with a smirk. "Oh, there she is."
"You still wanna agree to what she thinks we agreed to yesterday?" Mo asked Rarity.
Sunset stepped back before accidentally tripping over a volleyball and stepping on the selfie drone. Sci-Twi fell to the drone in dismay.
"It was an accident!" Sunset frowned. "I can help fix it!"
"I think you've helped enough." Sci-Twi glared.
"Twi, she's telling the truth; she tripped over that volleyball and stepped on the selfie drone!" Atticus told her.
The other girls seemed to also glare at Sunset.
"You believe me, don't you, Mo?" Atticus asked.
Mo looked to him before sighing softly. "You've never lied to me before... It's one of the things I love about you..." she then said. "Maybe it was an accident."
"And besides, Atticus is a horrible liar." Cherry said.
"Hey!" Atticus glared.
"Well, you are." Cherry smirked.
"Yeah, fair point." Atticus nodded.
"Well, I'm not sure about Sunset Shimmer, but if Atticus says it was an accident, then it was an accident." Mo firmly told the other girls.
"Alright." The Humane Six said.
Sunset glared to Trixie as she left with Snips and Snails. The others did as well.