Fast forward a few hours. Canterlot City High School, next to the portal. Everyone is there from Seth's house, and they're getting ready to go through.
Sci-Twi's Point of View
"Guys, when you go through the portal," I said, "You'll--"
"Outta our way!!" Indigo and Lemon shouted.
My head didn't stop spinning until after we were all in the portal room in Princess Twilight's castle. At least Princess Celestia and Princess Luna were there when I came to.
"What the fuck happened to my body!?" Sunny said, "I'M A DAMN HORSE!!!!!"
"Ho-ly shit, this is weird," Seth said, seeing himself as a pony with wings. Rarity was a unicorn, so sunset went to help her calm down. I looked at myself, and I was a unicorn, too. Like earlier.
"I don't even wanna know."
After a quick freakout from the Wondercolts and Seth coming to a realization, we left the castle at the request of Princess Twilight, while the princesses helped the five Shadowbolts come to terms with being ponies. The Equestrian variants of the Wondercolts stayed back at the castle.
"Dude," Seth said, as we all sat down at a table outside of a restaurant, "This is every brony's dream."
"Wait," Rainbow said, beginning to laugh at him, "You like to watch My Little Pony?"
"On VHS," he replied shamelessly. Rainbow responded by doubling over on the ground laughing her butt off.
"That's for little girls!"
"Yeah," he said, "Well last week when I went to the spa for the steamroom, my humidifier and radiator quit," he smiled slyly, "I saw a certain someone waiting in line for a little something."
Rainbow Dash jumped at that, "I stop laughing! It WASN'T me!"
"I don't know... maybe someone with an athletic complexion..."
"I won't make fun of it again!"
"Cerulean..."
"Please!!"
"Moderate cerise eyes..."
"ANYTHING!!! JUST NAME IT!!!"
"Rainbow Dash was there for a spa treatment."
"I'M RUINED!!!!!"
"You went to the spa? I could've had them give you the PERFECT treatment, Darling!"
"Why'd ya do somethin' lahke that, Seth?"
"Honestly," Sunset said, "Former bully here, but I've gotta take his side."
"An' yer doin' that WHY!?"
"It's justified. Not that he was trying to bully Rainbow to begin with, of course. He said he's a brony."
"Of course. An' what's wrong with that?"
"Then when Rainbow started laughing, he brought up her spa trip."
"An' jus' what the hell's wrong with goin' ta the spa?"
"Nothing. Just like there isn't anything wrong with him being a brony or me being a pegasister."
"So, yer tellin' me 'at Seth had ev'ry right ta say that."
"Pretty much.
"Look at 'er, fer God's sake!"
I went over to her and figured out what was going on.
"You're an athlete, right?"
"Yeah...?"
"And you love those Daring Doo books that you pretend so hard not to read?"
"Mm-hm...?"
"And you went to the spa one time?"
"About that..."
"No wonder you're so good at soccer, Darling!"
"What?" she responded.
"You seem to use it more as a 'relaxation-therapy' than to just primp and be girly from what I've just gathered."
"But it was the spa of all damn places!"
"So?"
"That's it?" Rainbow realized after a minute.
"Really?" Seth apathetically asked, coming over to the three of us. Suddenly his eyes were a bright crimson, his pupils became vertical, and there were two fangs protruding from his mouth.
"Darling, what's going on?"
"What the fuck!?"
She tried to run, but couldn't. Fear had actually taken hold of her. He was coming straight for me.
"Um, are you okay?"
"Is this some kind of hidden, creepy party?"
"Please, God, no!"
He was standing with the three of us now.
"Be gentle!"
"I've been a vampire for two years," he said as time seemed to return to normal, "I'm not gonna eat you. Or drink your blood. Or any of that."
"Then, what are you gonna do?"
"Absolutely nothing."
He looked at his hooves. His sandals had turned into Japanese Kimono... horseshoes?
"Hi, guys," a familiar voice said, "You're from the other..."
I turned around to find Seth's counterpart in this world. He, on the other hand, was scared at the fact that ours was a vampire.
"A'ight," he said, "What happened to you?"
"It's a long story, me."
"Darlings, we need to figure something out so we know which of you we're talking to."
"I'm Doc," Human Seth said.
"Works for," Pony Seth belched, "me. I'll be Pon-Seth."
"A'ight!" Doc said, "An angel JUST got its wings!"
Pon-Seth looked at me, "Oh no. Not even if I was single!"
He went to Sunset, "I've always seen something in Princess Twilight, but I don't know what to do."
"Pon-Seth, she's royalty, so your chances with her are pretty slim, if you even have any."
The others came and joined us, prompting Pon-Seth to fall lovesick for the princess. Princess Twilight, coincidentally, went over to Sunset, prompting for Pon-Seth to take a few steps back.
"I really want to tell him how I feel!"
"Just tell him, then."
Pon-Seth looked at her as she nervously smiled before taking a blunt approach to asking the question.
"I... would you... I mean I'd..."
"Yes?"
"How do I... well, ya see..."
"Princess, I don't think that I can ask you anymore because you're a princess now."
"Okay, then. I guess, just pretend that for the next half-hour I'm just a unicorn who put wings on herself."
Pon-Seth sighed, then popped the question, "Twilight, marry me?"
"YES!!!"
They ran together and did the pony-equivalent of kissing.
"I see you've found your special somepony, Twilight," Princess Celestia chuckled as what had to be my brother and Cadence from this world came up with my Equestrian parents.
Wow. Either he's city-fast, or he's been here.
"Two Twilights!?" Cadence asked.
"It's a long story, Shiny and Cadence."
"Shiny!?"
We ended up having to tell how we found out about Equestria. This was getting old.
"Wait," Shining said, "You're from an alternate world?"
"Uh-huh."
We heard a weird conversation between Pon-Seth and Doc.
"So, you're a vampire?"
"Damn straight."
"What's it like?"
Doc's eyes flashed red and his fangs extended again, "It's not really that different," he took a look of suspicion, "I'm picking up on a vibe..."
This can NOT end well...
If he fucking does what I think he will, run like hell away.
Done, Midnight.
"Could I"
Here it comes...
"be one too?"
The other five Shadowbolts came over to us.
"I've never done this before, but sure."
Oh shit...
Pon-Seth and Doc tried to figure the best way out for one to bite the other's neck. Evidently, they forgot they were in public.
"Okay," Doc said, "you sit down, and I'll bite you. That way, you won't fall over and possibly hurt yourself."
Pon-Seth laid down on his back instead, but began to squirm when Doc was getting ready to bite.
"On second thought, I really don't think that this 'vampire' stuff's for me. Maybe--"
"The worst part is the bite."
"Oh really, it's fine! I was just caught up in the moment! Really!"
Pon-Seth began to sweat profusely and squirm, but a firm hoof kept him restrained.
"Y-You're... you're strong, like, really strong!"
"I know. Still wanna squirm away?"
"No," he said as Doc lifted his hoof off of him, "But I still wanna do it."
"I'm doing it on the count of 10," Doc turned to my brother and Cadence, "Think you could come hold him down for me?"
They just shook their heads.
"I'll help," I said.
Lemon and Indigo looked at each other for a second, "Any friend of Twilight's is a friend of ours," Lemon said.
That took care of three hooves.
"I got the forth one," Doc said, "On the count of 10."
Pon-Seth started sweating again while Midnight was ready to run like hell.
"Ten, nine, eight, se-"
Doc sank his fangs into Pon-Seth's neck and began sucking, resulting in Pon squirming and screaming a little before he let go, leaving a heavily-breathing and scared-shitless Pon-Seth. He laid on the ground for about a minute with his eyes closed from exhaustion before getting back up.
"What was that about!?" he said, his pupils becoming vertical, irises becoming a hungry crimson, and fangs protruding from his mouth. Doc kept a smug look on his face the whole time.
"What was what about?"
"You biting and sucking my blood!" Pon-Seth said, "WHY!?"
Doc went to speak, but was subsequently interrupted.
"Princess Twilight wanted to marry me, but now I'd be surprised to find out that she even wants to look at me!"
Princess Twilight ran over to Pon-Seth, "You're beautiful, Redeyes."
"You really--?"
"Oh yeah."
"I'm a--"
"Vampegasus. Now, I want you to pin me down just like how Doc pinned you down, and I'll try to get up."
"Why?"
"Just wanna see how it felt to be you."
He pinned her down just as he had earlier, right when the two regal sisters came over. They only saw her struggling to try to get away from a vampire. What's worse is that they had royal guards with them.
"You're gonna fall to me, and all of your power will be mine!" Doc said.
"No! Let me up! I wanna be free!"
"STOP!!" Princess Celestia said, "Release the Princess! Guards, detain the threat!"
Unfortunately for Pon-Seth, he didn't know what was going on.
"Darling, please look around," the pony counterpart said, to no avail. He was caught.
"The assailant is NOT a regular pony, your highness.
NOBODY knew what to do.
"The assailant is a vampire," Princess Luna said, giving nonverbal instructions for everyone to maintain their distance, "A princess has never been attacked before, let alone by a creature of the night."
"What?"
"You attacked a princess! That is a felony that will land you in the dungeon, in stone for 1000 years, Seth Circuits!"
"Luna, stop! We were going to get married tomorrow!"
"Excuse me?"
"I love him."
"He is a creature of the night."
"Let him go."
Princess Luna and, by obligation, Princess Celestia were defeated in this battle, so Pon-Seth was let go, then he pinned the other me on the ground.
"If you cannot escape me," he said to her, "then I will have to make you my slave!"
She struggled some more, "Oh no!"
He leaned down to her neck, and I think that I saw his fangs retract.
"Nip!"
"Bleh."
He stood back up, "Arise from your slumber, as you will now be known as Red Dusk!"
"I am Red Dusk, and you are my master," she said flatly as she sat up, "What are your demands?"
They both burst out laughing, "So, will you be my prince?"
"Only if you'll be my Princess, you mutant."
"I will, wingman."
"The wedding shall be next week, then?"
"Sounds perfect," the vampegasus said.
"Mom," Sunset said, "Was something different supposed to happen?"
"Yes," she replied as Pon-Seth and Princess laid down on their backs.
"Sci-Twi, as weird as that sounds coming from me, should we...?" Doc asked, but was at a loss for words.
"I don't know."
Nobody knew what to do.
"This," Princess Celestia said, "is Equestria. You all are welcome here whenever you like."
"But, why did you want us here? At 2:00 specifically, at that?"
"This, my child, is when magic reaches its highest concentration in the ambient area. You, and all of the human counterparts, along with Sugarcoat, Indigo Zap, Lemon Tart Zest, and Sunny Flare, have all shown and proven yourselves, so your bodies are absorbing the final layer of magic that you would not have gained, had you remained in the human world."
"Can we go back home at all? And what about Sour Sweet?"
"Sour Sweet will be spending some time here with Princess Twilight and Dr Kindheart --" Princess Celestia said, but was interrupted by Sour.
"That SHRINK!?"
"He's not a shrink. You and him will be having sessions to help find the source of your conflicting aggression."
"Aww, that's nice! Thank you for making me talk to some-DAMN-body who's going to lock me up in an insane asylum and drug the SHIT out of me!!"
"We don't use medicine here. We let nature run its course. The closest thing we ever use to medicine is a doctor's magic," she said, "Anyway, you and him will be seeing each other for a week, and then we'll see your progress. As for the rest of you," she continued, "this magic is now a part of you. Whatever you do, you will always have it with you."
The next thing that I knew was that we all went back, with the exception of a now-more-composed Sour Sweet. The rest of the day, thank God, was more-or-less uneventful.