Sunset Shimmer led the way out, alicorns following her and then all the ponies in attendance did. She lit her horn, creating a portal in front of her and pony after pony followed her through to appear in the castle of the twin sisters.
"I figure this would be a better venue than whatever was planned at Canterlot."
"Sunset! We can't hav eponies here, this place is dangerous!" Celestia scalded, "even I don't know where all the traps are."
Pulsar's horn was already sparking, trap after trap being shut down around the castle, "Starswirl's traps shouldn't be active anymore," Pulsar muttered while he went around deactivating the traps powered by his enchantments before setting a shield around the castle and pushing malevolence out.
Pulsar was alone as he walked the halls, teleporting food into the decripit throne room where everypony was. His horn began an audible crackling as his magic amplified. Stone began to come alive in the castle as he walked it, the roof repairing itself as the stone stretched tall, a growth spell with duplication intwined was allowing him to mostly recreate the castle with a perfect accuracy.
He began galloping around, observing structures reviving themself before he landed in the throne room and everypony watched the stones fly up and seal themselve sin their original positions. He had recreated the castle almsot perfectly, but he dare not turn back time on the aged stone to give it the newly built look it once had, vines were still around, severed and laying on the floor from his effort, damage still visible in some place, and the color of the stone stayed as a dull grey in contrast to the bright banquet tables.
"Thousands of years since. If she wants it here, it will be fitting for her coronation celebration," he felt sweat bead on his brow, panting from his exertion.
"Ponyfeathers, it's just like it used to look!" Luna trotted about, "like I'm a filly again."
"Nothing but the best for me, huh?" Sunset trotted to him.
"That's right," he smiled, giving her a kiss on her cheek, "it's your coronation, you're going to have many ponies meet you again I imagine, or at least watching you to learn about you. I, uh...have something to look into for a moment," he trotted off.
"As long as you come and follow me around again, you can go wherever," she laughed behind her closed lips.
Pulsar walked to the thrones, "wonder if the mechanisms still work," he reached behind a throne and smashed a hoof hard against it, stone rising around the throne and covering the top, concealing him.
He kept his hoof smashed to the back of the throne, a hidden button imprinted and a rear hoof slammed into the back wall, he retracted and smashed both buttons again before rotating both thrones to face each other, a wall behind him slid down and he trotted inside, stepping on a hidden button of the floor of the new room, the walls around the throne collapsed just after the wall that was slid down slammed back up.
"To this day, I haven't figured out where he goes when he does that," Celestia laughed.
"Oh, I know exactly where he went," Sunset smiled.
"Where?! Wheeere?! We must know," Luna grabbed the new alicorn.
"I can't saaaaay. It's a secret only we get to know," she pointed to the six from the other world. It wasn't long before Princess Twilight came over and began a long catching up with all seven of them.
Pulsar peered around his decayed old room, everything was there exactly as he left it, nopony even knew where it was.
Not Starswirl. Not Dingy Coat. He wanted his room to be a complete secret, a place where he could have hidden the twin sisters if needed. While he was their magical tutor, they were the closest things to children to him and their protection was as much a given duty as it was a personal one. There were some things here he had not even bothered coming back for, ancient books that he copied into his memory and rare tools that he recollected over the years, but there was a single artifact here that he did not come back for no recreate as it took Dingy Coat and Starswirl along with himself to create it.
"Wonder if it this still works," he trotted toward the other side of the small room before stopping and seeing two painting hanging on the wall above his bed.
Being centered in the castle meant there wasn't much natural light but through a series of mirrors and tunnel reaching to the outside, sunlight could bounce all the way down to him.
Those mirrors were long since shattered and became nests of birds.
An illumination spell revealed the paintings. A trio of researchers sat around, discussing fiercely with each other, a plaque below it, he removed the dust with his magic.
Rage of a Friend's Debate by Low Stroke
That was a painter he commissioned from the common populace, nopony royal, from back of the days of unicorn court.
He smiled, a memory from his past, he gingerly lifted the painting up, casting a spell to renew the structural integrity before teleporting it to his library at his home. The other painting he looked at the other painting, clearing the dust to show a young Celestia and Luna on either side of him, the three hugging.
Bonds of Guidance by Low Stroke
A favorite painter of his, he smiled wider before teleporting it off after the repair spell. He turned his attention to the artifact, the stool still sat out of stone in front of it with the rune modelled to be a unicorn horn stuck in the top of it.
He set at the stool and put his hoof in a slot, a needle came and pricked his hoof with very little pain before the wheels began spinning about on the artifact's console. The canterlot archive machine was modeled after the internals of this machine, but nopony except him now knew it existed.
"Last user, please."
The wheels stopped, the top displaying recent history and on the runes below it appeared in ancient equi letterings.
"Wha-...what?"
Sunset's name was spelt out.
"Next previous user please."
The wheels spun and landed on 2nd most recent.
The runes lit differently to spell another name, his.
"Seems someone visited my room before coming to Canterlot...she's truly impressive in her magic abilities."
He breathed out, "Pulsar Splash's Ocean Meteor."
The wheels spun to ____ spell.
"Imbue horn," and the first slot changed to imbue.
The rune modeled after a horn at the top lit brightly for a second.
The rune changed to confirm the horn was imbued successfully.
Pulsar grabbed it and teleported to the top of the castle, aiming the horn into the sky before he pushed a button on the bottom of it and it lit brightly. It was only good for one use of a spell.
A grey flaming ball of magic materialized at the horn's tip before shooting at an incredible speed into the sky to be lost in the infinite cosmos.
He teleported back and sat the horn on the artifiact again, checking to ensure the anti magic ward was still on it along with the styling to prevent the magic energy leak.
He took another look around the room before putting etchings in a stone he duplicated, holding the small slab with his left wing.
"I have a feeling...nopony will come across this place for thousands of years," he smiled, "when I'm the only alicorn left."
"So...here we go," he cast a simple hidden ink spell on the buttons to open and how things worked, messages all over his room before he clicked in the button next to the 'door' and the walls around the throne slid into place before it opened.
He stepped out and cast another invisible ink spell on the buttons here before setting the stone slab on the ground behind Luna's ancient throne.
The walls slid down and revealed the alicorn.
"Pulsar! Where did you go?! I've never seen that happen before!"
"Of course not, Celestia. That was a mechanism I installed."
"But how does it work?"
"I won't tell, but don't you find it odd that nopony could ever find me here even though I lived in the castle? Nopony ever asked how to get to my room after all," he smiled and trotted down from the platform.
"He...he had a room?"
"I told you he did!" Celestia pointed at her sister.
The Prince returned to the new Princess, "how do you think you'll open your counsel?" He asked Sunset.
"Hmm...I think I'll travel Equestria for that," her friends from across the mirror were there, "and of course, hold that counsel in the human world for anyone who wants it."
"You're always welcome to hold it at my home," he smiled.
"So...now there's basically a royal couple that visits our world," Rarity smirked, "like a story from a book."
"Keep your hat on, Rarity," Applejack spoke up, "I just hope we'll still get to have some good times with you, Sunset."
Pulsar sat on his haunches, looking through the skylight window in the ceiling, "there's...something coming. I've felt it nagging at me."
"What have you felt?" Fluttershy asked.
"Is it the feeling before you get a stomach ache from eating so much cake?! Because that's definitely what I have," the party pony had chimed in.
Pulsar laughed, "I wish, I truly do wish that was it. I've felt the EverMore reach to me and show me things to be aware of, something is happening to magic and I don't know what it is."
"Well, if you don't know anything about it, how can ya worry about it?" Rainbow mentioned.
"She's right," the glasses Twilight mentioned.
And the celebration continued proper.