It's been a month since Twilight and Emerald have been given an unfinished spell by Starswirl the Bearded from Princess Celestia. In an attempt to research and complete it under her belief that they had what it takes to complete what even the great wizard like Starswirl could not, they had somehow mixed up the destinies of their friends. But after solving the problem and re-correcting the cutie mark mystery, Emerald Lightning and Twilight Sparkle were blasted by the energies of the Elements of Harmony and vanished, only to be visited by their teacher in some strange other realm or like a dream world. And after some dialogue by Celestia, they were transformed into alicorns by the powers of magic and their representing elements. There was a huge celebration welcoming Emerald and Twilight as part of the royal crown of Equestria.

But ever since that first day Twilight Sparkle and Emerald Lightning (and Spike, too) arrived in Ponyville to overlook the Summer Sun Celebration, the two ponies had never thought of finding friends outside their own social circles. In meeting Applejack, Rainbow Dash, Rarity, Fluttershy, and Pinkie Pie on the eve of Nightmare Moon's return, Twilight and Emerald fully understood what friendship truly was, and embraced their new friends, leading down a path of adventure and the study of the magic of friendship. The Mane Seven have explored all of Equestria, meeting new ponies, making new friends, as well as overcoming trials and personal hardships from time to time, and even saving Equestria twice (once from Discord, the second from Queen Chrysalis), and saving the Crystal Empire from the evil sorcerer King Sombra.

Henceforth, this particular story begins as the Friendship Express pulls away from the Crystal Train Station one month since the coronation. Twilight Sparkle, Emerald Lightning, Applejack, Pinkie Pie, Rarity, Fluttershy, and Rainbow Dash have arrived to the Crystal Empire.

"This city looks just as beautiful as the last time we were here," Emerald comments, gazing at the beautiful scenery casted by the sunset.

"The last time we were here, we helped Princess Cadance win host for the Equestrian Games. Boy that was one side-tracked day we had then."

"I simply adore the city. So lavishing..."

Rarity was off in her world of beauty, earning some amused chuckles from the others.

"Say, it's been a month since you and your brother became alicorns. How's the wings?" asks Rainbow Dash.

Twilight chuckles nervously.

"Well... I'm still not used to these things," she admits, taking this time to spread her wings.

"I on the other hand have been getting some good flying practice in. I try and help Twilight now and then. For some reason I take to flying much more easily than her."

"Not for the lack of trying," Twilight cuts in. "I'm still learning."

"And if she ever wants my help I'll try my damn best to do so," Emerald says with a smile.

"I'll get the hang of it soon. Can't be too hard once I can properly fly," said Twilight, as she attempts to fly, only to do a Derpy-styled short flight before crashing into her brother Emerald.

"Maybe we should enchant a sweeping broom and fly like the pony witches in Little Witch Academia," said Emerald with a widening grin. Twilight's response is to playfully smack him in the face with her tail. That elicits some giggles from the other girls.

Rarity trots up to the sibling duo. "Twilight, I have to ask, but did you pack your crown? You're not even wearing it and I couldn't help but notice."

"Oh she has it packed in her suitcase," Emerald answers. And Spike pops it open, showing that on top of some books and some formal clothing, the tiara (the Element of Magic) was secured away. "I also have my own crown packed away in my suitcase as well. The both of us didn't feel like wearing them out in public. Even if it's been a month since our magic transformed us into alicorns... we're still kind of shy about public opinion."

"Ya'll know we would never judge you two. We're your friends after all," Applejack spoke up.

Twilight and Emerald both smile.

"I'm just hoping this all goes over well. After all, this is our first ever summit as royalty," said Emerald.

"I know that Emerald must be excited for our Prince and Princess Summit here in the Crystal Empire, but I'm a bit nervous myself," Twilight tells her friends.

Pinkie Pie giggles. "You're nervicited! It's like you wanna jump up and down and yell "YAY ME!" But you also wanna curl up in a teeny-tiny ball and hide at the same time! Don't worry Twilight, we've all been there!"

Emerald watched with amusement as Pinkie Pie physically demonstrated her apparent new word, and after she curled up into a tight ball as if she had the power to use Morph Ball from the Metroid games, she unfurls back to all four hooves like she was a Transformare.

"We should get going to the castle. Don't want to be late and all," Rarity tells the girls plus Emerald.

Everyone started walking towards the castle in the distance, chatting away to pass the time. After some time, they arrived to the castle, where a fanfare of sorts played upon their arrival in the main royal hallway.

"Introducing your royal highness, Princess Twilight Sparkle and Prince Emerald Lightning!" announced an amber-coated stallion wearing the armor of the Royal Guard. All other pony guards salute with their wings or their hooves as Twilight and Emerald walk down the carpet, followed closely by their friends. Waiting for them was Princess Celestia, Princess Luna, and Princess Cadance.

"Twilight and Emerald! I haven't seen you two since the coronation!" says Cadance, smiling proudly to the two.

"Hello Princess Cadance," greets Emerald, bowing to the princess who represented the element of love.

Princess Celestia smiles fondly to her two students and to their friends. "We have so much to discuss. But it can wait until tomorrow. You all look tired from your journey. Now, off to bed, all of you."

The other mares chatted animatedly as they were excused to leave. A royal guardspony led them out of the room. Twilight and Emerald smile to one another as they leave as well.

Cadance looks at Twilight and Emerald's retreating backs, before smiling to herself.

"You know... I wonder how long until Twilight and Emerald admit the feelings between them."

"What do you mean, Cadance?" Celestia questions the pink winged mare.

She giggles. "I have foalsit those two since they were young, Celestia. I can feel the love between them is stronger than normal. Even you can't deny that there's a certain spark between them, despite the whole brother and sister thing."

Luna looks to Celestia, a sly smirk playing upon her lips. The elder pony sister couldn't help but acknowledge Cadance's words.

"Yes, you are right. And let's not forget that Emerald Lightning is the first male alicorn in a very long time, since my and Luna's father, our previous King of Equestria."

"They are destined for a great and many things," says Luna.

The other two mares agreed to that.

=0=0=0=

"What's wrong, Twilight?" questions Spike as he was getting settled in his own small bed prepared for him.

"I don't know, Spike. I'm just... worried, I guess. Princess Cadance was given the Crystal Empire to rule over. What if, now that I'm a princess and my brother a prince, Celestia expects me and Emerald to lead a kingdom of our own?"

"That would be awesome!" says Spike, jumping for joy.

"Nah... I doubt it would be, Spike," Emerald spoke up, levitating his own things into his section of the dressers. "Just because Twilight and I have this crown and these wings, the both of us are just worried that we'll be expected of a lot more now than ever."

Emerald looks up. "I don't know if I'm even royal material enough. Despite being an alicorn, I did research and the last male alicorn ever in Equestria was Princess Celestia and Luna's father from a very long time ago. What if I don't make the cut as an alicorn prince?"

"And what if I don't show the skills of being a good leader like the other princesses?" questions Twilight with a look of worry on her face.

"Aw, sure ya will. You and Emerald would never let the tough stuff sweat ya out. You two always come through the toughest of situations! Now c'mon, you should get some shut-eye. We got a big day tomorrow!" And Spike jumps into his bed, blanket wrapped comfortably around him as he lets out a good sigh.

Emerald looks to Twilight who sets her tiara on the bedside stand next to Emerald's crown that after the Return of Harmony adventure (or as Emerald Lightning fondly tagged that adventure when Discord first returned to spread chaos) was born from magic representing Emerald's Element of Courage.

"Spike is right. We should get some sleep," Twilight said.

"Heh... it's been awhile since we slept in the same bed, sis."

"That's because we got separate beds ever since we turned into alicorns. This one's bigger than the ones back home in Ponyville." And she glanced at him after packing her books away into her section of the shared dresser. "And the way you said it sounded like we're going out or something."

Emerald shrugged, or did a pony equivalent of a shrug and climbed into the bed.

"You know what I mean sis. Wings or not it never bothered you much. Our friends never batted an eyelash at the fact a brother and a sister still sleep together in a shared bed."

Soon Twilight got into bed after making sure everything was organized. She turns the light off from the lamp on the bedside table using her magic.

"When we were young foals us sharing a bed were cute scenes of innocence to our parents and older brother. Now... this means different..."

"Don't care what others think, Twi," says Emerald with a yawn breaking from him.

Spike finally relaxes after the off-screen comments and noises ceased and tried to get some good shut-eye. Then his eyes open as he hears Twilight grunt. No, it wasn't THAT type of grunt, you clop perverts. Fancying a peek, he could see Twilight struggle with the blankets; her wings were once again getting in the way.

"Can't... tuck...!"

Emerald reaches over to sooth his sister's wings, managing to calm her down and tuck her wings in properly.

"Thanks brother dear," she whispers softly.

Twang!

Emerald rubs his muzzle, as one of her wings smacked him in the face.

"Just trying to get comfortable!" complained Twilight, struggling once more. "Ugh!"

Emerald moves close and nuzzles his sister. "Then get comfortable. Don't worry sis, even though it's been a month, I can still help you through the wing problem. No doubt Rainbow Dash and Fluttershy will also be willing to help us."

She sighs as her head hits the pillow once more.

"Try and get some sleep sis... we got a big day in the morning and we'll need our rest."

"Easy for you to say Emerald, you've gotten used to those wings of yours a lot faster after the incident turned us into alicorns in the first place."

Emerald chuckles a bit, wrapping his forelegs around Twilight after once again soothing her wings to fold in. Twilight subconsciously smiled; she always felt safer in her brother's embrace.

"Who knows... maybe I was a pegasus born in a unicorn's body?"

That got a smile from Twilight. Eventually the two siblings drifted off into a good sleep and Spike smiles himself and returned to sleep. All was calm, and all was quiet in the Crystal Empire.


Lightning Sparkle

Disclaimer: I do not own any of the official characters from My Little Pony: Friendship is Magic. Lauren Faust is the person who created this generation of ponies. J.K. Rowling is the owner of the entire Harry Potter franchise. I do not own anything that is mentioned as a crossover cameo from anime, manga, video games, music, TV shows, movies, or otherwise. All I own is this idea to ponify Harry Potter and dump his flank into Equestria to be raised as the age-identical sibling of Twilight Sparkle.

Author's Note: The sequel to Emerald Twilight. Although this will take some references from the movie Equestria Girls, it'll be a full crossover into the HP world through the mirror at the Crystal Empire. It may have some Twi/Em shipping. So while drawing some Equestria Girls references, there will be no human versions of the other ponies in this story. Although does Pinkie Pie and Luna Lovegood share the same all-knowingness when it comes to knowing things outside the fictional fourth wall?


Dat Prologue

The crickets chirped in the night. The stars twinkled in the cloudless sky with dazzling beauty only night owls and ponies who adore the night life would enjoy. While all was calm and quiet here in the Crystal Empire, a shadow lurked in the dark heading towards the castle. The guards never knew of the intruder as the night guardsponies performed their duties as silent as ever. If anypony was lucky to get a glimpse of the intruder, he or she would recognize a unicorn's horn against a curly yellow and red mane hidden by a brown hood of a full body cloak. With a silent cast of a magical spell, the intruder manages to enter the castle's interior and stalked along the shadows, keeping out of sight of the flashlights or lanterns used by the ponies standing guard.

Eventually the trek leads our intruder to the door of Emerald Lightning and Twilight Sparkle. With a lift hoof, the intruder quietly pushes the door open. The door gave the tiniest of creaks. The sleeping occupants in the room gave no indication. Quiet a mouse the intruder hoof steps over to the bed. Sleeping together in bed was the brother and sister duo as read about in the papers. A disgusted look was etched on the pony's face before looking to the table near the bed. There...

Two of the Elements of Harmony: Magic and Courage. The Element of Magic was the catalyst to the other elements and when used together produced the power of harmony to defeat any evil force or a force that radiated malicious intent. And then there was the mysterious Element of Courage, supposedly represented by Twilight's brother, Emerald Lightning. It was created solely by the magic of the Elements of Harmony after the defeat of Discord the first time around, and apparently boosted the courage of those around when facing adversity (as evidenced when the Changelings attempted to usurp Canterlot's royalty during the Royal Wedding).

Both elements were powerful in their own right.

With some magic, the two elements were levitated off the table and replicas were set down in place. As the intruder quietly makes for the exit, Spike's tail slipped out of his bed and the intruder trips, creating enough noise to rouse Spike awake. The crowns clattered to the floor.

"Huh? What...?"

Spike then saw the glare from the pony in the hood as she ran with the crowns swiftly grabbed by a teal magic aura.

"Twilight! Emerald! Someone's escaping from the room with the Elements of Harmony!" Spike shouted.

That woke up the siblings as they caught sight of a pony escaping with their crowns.

Twilight gasps. "My crown! She's got my crown! Stop! Thief!"

"Sis!" Emerald shouted, running after Twilight as his sister chased after the pony who took their crowns. The level of noise woke up the others from their beds as they exited to investigate what's going on.

"She's stolen my crown!" Twilight shouted, chasing after the mysteriously-cloaked pony.

The other girls immediately help, giving chase after the thief.

"Stop!"

Emerald jumps into the air and zips off, wings in flight as he zooms past Twilight just as the pony entered a room. He slams right into the pony knocking them both to the floor, and out from the saddlebags was their stolen crowns.

"What did you do with my crown?" Twilight interrogates the thief.

The hood was ripped away as Emerald was bucked off and she stands up, summoning the elements back to her. Her fiery-looking mane and her eyes gave a deadly intent.

"Sorry it had to be this way, Prince and Princess."

Before anypony could stop her, she had jumped straight at the large mirror bordered by a horse shoe... and vanishing with a ripple of magic radiating from the reflective surface. She escaped and had successfully stolen two of the Elements of Harmony. The morning came and the entire castle knew to the events that happened during the night. Twilight and Emerald did their best to explain the identity of the pony that snuck like a thief and got away with two of the Elements of Harmony.

"Who was that who stole the crowns?" questions Fluttershy. Everypony was back inside the room that contained the mirror that the thief dashed into to escape from them.

"Sunset Shimmer," Celestia answers, "She was a former student of mine. She began her studies with me not long before Twilight and Emerald did. But when she did not get what she wanted as quickly as she liked, she turned cruel and dishonest. I tried to help her, but she eventually decided to abandon her studies and pursue her own path. One that has sadly led to her stealing your crowns..."

Spike rushed into the room, carrying two obvious-looking but high-quality fakes. "She replaced Twilight's and Emerald's with this one." Even under the sparkle of the light through the window of this room, the gems did not shimmer.

Princess Celestia frowns. "I suppose Sunset Shimmer thought you wouldn't notice right away that this was not yours. And by the time you did, it would be too late to go after your crowns and Elements of Harmony."

"But I don't understand. Where did she go?" questions Twilight.

"And why would this Sunset Shimmer take the crowns?" Emerald injects his own question.

"You'll soon know more about this place than even I do," Celestia answers her two students.

Princess Luna walks to the mirror, glancing at the reflective surface. If one took a closer look, a tiny almost invisible ripple of magic radiates over its surface. "This is no ordinary mirror. It is a gateway to another world. A gateway that opens once every thirty moons..."

Pinkie Pie rushed up to the mirror and she put a hoof on its surface. At her touch a reflection of magic radiates from her hoof as she swirls the "watery surface" about with giggles. "This is sparkly!" Pinkie exclaims, finding fun in this.

An aura of magic surrounds her body and she's yanked away by Luna.

"It has always been kept in the throne room of Canterlot Castle. But when Princess Cadance took over the Crystal Empire, we sent it here for her to watch over," Princess Luna tells Twilight, Emerald, as well as their friends.

"So this mirror leads to another world. Has anypony ever did studies on it? Any leading investigations as to what lies behind the portal?" Emerald questions Princess Celestia.

"Sadly, no. Such a thing would be too dangerous. We all have been a bit afraid as to what dangers would lurk beyond this mirror. We made sure no pony ever got close to it. The only person who did was Sunset Shimmer when she fled Equestria in escaping. I had prayed that one day she would return and once more seek my guidance... but sadly it has not happened."

Emerald frowned.

"What do we have to do to get back our stolen elements, princess?"

"Twilight, Emerald, the two of you must use the mirror to go into this other world and retrieve your crowns. Without the Element of Magic, the other Elements of Harmony have no power and Equestria is left without one of its most important means of defense." Cadance held a look of worry on her face. "And the Element of Courage if used for the wrong reasons could become a devastating force to reckon with."

Luna stares at the two. "Your crowns do not belong in the place Sunset Shimmer now calls home. And in her possession, your Element of Harmony will no doubt be used to bring harm to the inhabitants of this other realm. They will not have the power to defend themselves."

"You understand the importance of your task?" Princess Celestia questions her two loyal students.

"Of course," the two siblings answer.

"Good." With her magic, she levitated two saddlebags over and they rest securely onto their backs with room to maneuver their wings. Celestia had quickly packed these bags for her students and also stuffed some outfits into one of the pockets. "Then you must go at once."

"Whoa, whoa, whoa! Wait a darn minute!" Rainbow Dash interrupts. "There's no way that the rest of us are going to sit back and do nothing! We won't abandon our friends!"

Pinkie Pie squees as the other girls all respond positively. Twilight and Emerald were both smiling; friendship knew no boundaries, after all.

"Oooh! I'm so nervicited!" exclaims Pinkie Pie.

"You do realize that's not a real word, right?" Applejack says to Pinkie.

Pinkie Pie just smiles as usual, looking very aloof.

Even though Princess Celestia was proud that Twilight and Emerald's friends would never abandon them, she had to stop them before it gets out of hoof.

"I'm afraid I can't let you go."

The other girls gasp. It was Rainbow Dash who spoke up with, "What?! Why not?!"

"Sending all of you could upset the balance of this alternate world, creating havoc that would make it impossible for Twilight and Emerald to get the crowns back from Sunset Shimmer." Celestia looks to her two students. "This is something Princess Twilight and Prince Emerald must do alone."

Princess Luna cuts into the conversation. "Time is of the essence. On the third day, when the moon reaches its peak in the night sky, the gateway will close. And once it does, it will be another thirty moons before you will be able to use it to return."

The others gasp, as Twilight and Emerald looked very nervous; if they couldn't get back their stolen items in time, they could very well be trapped in the other world until the portals opened again. It was Emerald who first regained confidence.

"Do not fret... we'll get our stuff back from Sunset Shimmer, and we'll make it back home before that portal seals again. Believe it!"

Why did Emerald suddenly feel like washing himself after saying those two words?

"Good luck you two, and please... be careful," said Celestia.

"Ready Twi?"

"Yeah..."

"Don't worry... you're strong in heart and soul. Don't let this betray to your fears."

She smiles. "I know."

They look to their friends and Spike, and the princesses standing behind them watching calmly. Then together, they walk right into the mirror and vanish into its portal. Spike was very nervous. He didn't like this situation very much. Finally, he decided to take that leap of faith. "Spike, NO!" the other girls shout as Spike rushed after Twilight and Emerald, not wanting to lose the two he loves very much.

The baby dragon vanished into the portal and Celestia casts a barrier to prevent anypony else from foolishly rushing in. The portal was like being squeezed through a drinking straw, being stretched like laffy taffy, and finally chewed up by a giant pony-eating dragon then spit back out again. It was a dizzying experience for the two ponies and one dragon as the vibrant colors flashed before their eyes... then darkness.

On a shelf containing old trinkets made of silver or white or gold inside an ancient-looking castle in the Scottish highlands near a lake of an unplottable location, a small metallic globe of Earth started to spin softly releasing a whisper of vapor. Soon the whispers of the small vapors would strengthen, and then release small puffs of clean white smoke every now and then. Several other trinkets long since dead would start to react as well.

Sadly, no one was in the Headmaster's office except for the sleeping portraits of the previous Headmasters of Hogwarts, a very bored hundreds of years old Sorting Hat, and a sleeping phoenix on its golden elegant perch...


And that ends the Equestria Girls portion of the story and right into the world of Harry Potter. Next chapter: Twilight, Emerald, and Spike discover a brand new world... but they're not ponies and a dragon anymore.