My Little Pony Equestria Girls: Monster Mash-Up Musical

The scene fades into the bustling hallways of Canterlot High on a crisp autumn day. The human versions of Twilight's friends are hard at work, decorating the school with Halloween decorations. Applejack is placing scarecrows and dummies around the hallways, while Fluttershy, with the help of her animal companions, is arranging homemade jack-o’-lanterns between the classroom doors. Rarity is hanging various lanterns from the ceiling, each adorned with a different Halloween-themed creature: bats, spiders, snakes, ravens, and owls, all in shades of purple, orange, and black. Pinkie Pie is busy setting up a Halloween candy station, surrounded by an array of orange, purple, and black balloons. Rainbow Dash, using her super-speed, is decorating the windows with fake cobwebs, the classroom doors with green glow-in-the-dark stickers, and the lockers with orange and black streamers. A thick, eerie fog rolls across the floor, adding an extra layer of spookiness. The Rainbooms turn their attention to Trixie, who is adding some special effects with a fog machine.

"Hey, girls," comes a voice from behind them. The group turns to see Sunset, in her human form, approaching.

"Sunset, you’re back!" Fluttershy exclaims, her eyes lighting up with delight.

"What do you think of these Halloween decorations we put up?" Rarity asks, clearly proud of their efforts.

"I bet our classmates and teachers will find them spooooooooooky," Rainbow Dash adds with a grin.

Sunset smiles. "Yeah, really spooky. Oh, oh! Girls! Look who decided to join us on Halloween!" She steps aside to reveal Twilight and Starlight, both transformed into their human forms, and Spike in his dog form, still wearing his skeleton costume.

"Happy Halloween, girls!" Twilight says, beaming with excitement.

"Twilight! Spike!" Applejack exclaims, rushing forward to greet them.

"Starlight!" Trixie says as she walks up to her old Equestrian friend.

"Hey! Trixie!" Starlight replies as they warmly embrace. "Long time, no see."

Spike trots up to Fluttershy, who immediately scoops him up and begins to pet him. "Aw! Spike! Your costume is just adorable!" she coos.

"Thanks, Fluttershy. I heard that from you, twice in one day," Spike says, blushing from the compliment.

Pinkie Pie turns to Twilight with a grin. "Well, well, back again. At this rate, you should probably just move in with us."

Twilight chuckles. "Well, I don’t know about that, but Sunset told us about your Halloween celebrations. In Equestria, we call it 'Nightmare Night.'"

"And she thought we’d like to spend Halloween with you all until your Twilight comes home," Starlight adds.

Rarity’s eyes widen with excitement. "Princess Twilight and Starlight Glimmer spending Halloween with us? Ooh! I think I’m going to faint."

Sunset reaches into her satchel and pulls out Sci-Twi’s geode pendant. "And she let us keep an eye on her geode until she gets back." She hands the pendant to Twilight. "Hey, why don’t you wear the geode until then? It’ll be like our Twilight never left."

Twilight grins and slips the geode around her neck. "Huh. Nice."

"Oh!" Sunset says, reaching back into her satchel. "I almost forgot! Twilight took another trip to Camp Everfree a couple of months ago and found two more geode crystals." She retrieves two additional pendants—one deep blue with Trixie’s cutie mark, the other green with Starlight’s cutie mark. "She got these for Starlight and Trixie. Trixie’s geode will give her the ability to cast illusions, and Starlight’s gives her luminosity abilities."

"Controlling light? Sounds like my kind of thing," Starlight says, taking her new geode.

"And illusions are pretty much like magic tricks. I accept," Trixie agrees, accepting her geode.

Twilight, eager to try out her geode, uses telekinesis to levitate a caramel apple from Pinkie Pie’s candy stand and offers it to Pinkie. Starlight places her hand over Trixie’s head, and her palm shines like a spotlight. Trixie activates her geode, conjuring illusions of rainbow balls, diamonds, apples, balloons, butterflies, and books, which float down from the ceiling like snowflakes before vanishing with a flick of her wrist.

"Well, it looks like you girls went full haunt this Halloween," Twilight observes, admiring the decorations.

"Well, if you think this is spooky, you should check out what’s happening in town," Rainbow Dash says, a hint of excitement in her voice.

The scene shifts to Canterlot City, where Halloween decorations adorn various buildings, including Sweet Shoppe and Carousel Boutique. Twilight, Spike, Starlight, the Rainbooms, and Trixie stroll down the sidewalk, taking in the spooky atmosphere. They spot DJ Pon-3 waving at them from a distance. The mute music lover rushes over to them.

"DJ Pon-3," Twilight greets.

"How’s it going?" Sunset adds.

DJ Pon-3 gives a thumbs up with a nervous grin. Her smile fades as she removes her purple-tinted shades, revealing her anxious dark fuchsia eyes. She tries to use sign language to communicate with the group.

"Uh… You got a screw loose in your turntables?" Applejack guesses, but DJ shakes her head.

"Spiders tangled in their own webs?" Fluttershy offers, but DJ shakes her head again.

"Thread on one of your outfits coming undone?" Rarity suggests, to which DJ again shakes her head.

"You have an overdue book?" Twilight asks.

"Trying to throw a big Halloween party?" Pinkie Pie guesses.

"You’re using exercise equipment that looks like creepy creatures?" Rainbow Dash adds.

Starlight, frustrated by the lack of progress, whistles loudly to get everyone’s attention. All eyes turn to her as she pulls out a can labeled "Speech Spray". "Let me handle this." She says as she approaches DJ Pon-3. She sprays a mist of turquoise liquid on DJ, who coughs as the spray dissipates.

"Ugh! Careful with what you spray!" DJ Pon-3 suddenly exclaims, her voice sounding surprisingly cool. "You never know if it’s hazardous!" She puts her hands over her mouth, surprised that she just spoke.

"What in tarnation?!" Applejack exclaims, astonished.

"Something’s happened!" Trixie’s voice rings out.

"I’m talking! I AM TALKING!" DJ Pon-3 exclaims excitedly. "Whoa! Who knew my voice sounded this cool?" She winks at the group, who are visibly impressed.

"Starlight, that wasn’t a refreshing spritz you gave her, was it?" Rainbow Dash asks.

"It’s a Speech Spray," Starlight replies, "but yes, it does have a lavender quality to it. Twilight helped me make something out of one of my magic skills."

"Girls, you’re gonna have to come with me to the mall," DJ Pon-3 says urgently. "The newspapers have critic sections about you again."

The Rainbooms follow DJ Pon-3 off-screen, their curiosity piqued about what awaits them at the mall.

The scene shifts to the Canterlot Mall, at dusk and adorned with elaborate Halloween decorations. Inside, Twilight’s crush, Flash Sentry, sits at one of the tables in the food court, a newspaper spread out before him. His face is etched with frustration as he reads an article that clearly displeases him. Nearby, a small group has gathered, their expressions mirroring Flash’s annoyance. Among them are Princess Celestia and Vice Principal Luna, the Principals of Canterlot High, alongside Principal Cadance, who has transitioned from Dean of Crystal Prep to its principal some time after the Friendship Games. The crocked-eyed Derpy Hooves and the Cutie Mark Crusaders—Apple Bloom, Scootaloo, and Sweetie Belle—are also engrossed in their own copies of the newspaper, each bearing a similarly displeased look. The Crusaders, ever in the spirit of Halloween, are holding plastic masks on sticks: Apple Bloom's is a werewolf, Scootaloo - a vampire, and Sweetie Belle - a witch.

As Twilight, Spike, and the rest of the girls arrive at the food court, they immediately sense the tension in the air. DJ gestures for them to proceed, and they approach the group with concern. Twilight’s eyes lock onto Flash, who

"Flash," Twilight calls softly, her voice laced with concern.

Flash looks up from his newspaper at the sound of her voice, then spots her approaching. "Twilight?" Flash responds, his face lighting up with surprise. As Twilight nods in confirmation, a warm smile spreads across his face, and he rises to embrace her. "Twilight, you’re back," he says with genuine happiness, pulling her into a tight hug. "Hey! Starlight! How’s it going?" he adds, offering Starlight a fist bump, which she returns with a grin.

"Twilight Sparkle!" Principal Celestia greets warmly.

"The Princess of the Fall Formal has returned," Vice Principal Luna adds.

"We heard about the critic articles about the Rainbooms in the newspaper again," Rainbow Dash says, her tone reflecting the annoyance that everyone else is feeling.

"Yep, just get a load of this," Principal Cadance says, handing one of the newspapers to the Rainbooms. Twilight and Sunset lean in, their eyes scanning the offending article, which features a photo of a middle-aged man named George Sullivan.

Twilight reads aloud, her voice tinged with disbelief, "‘George Sullivan. In a world seemingly obsessed with the mundane and mediocre, the Rainbooms have managed to carve out a niche for themselves as the epitome of both. With their grating vocal stylings that bear a striking resemblance to a herd of cats caught in a blender, and their questionable fashion choices that would make a peacock blush, these so-called “music icons” have somehow managed to captivate a legion of impressionable young fans.’"

Sunset continues, her voice growing more indignant with each word, "‘Their recent performance at Canterlot Stadium was a prime example of their artistic bankruptcy. The stage was a garish spectacle of neon colors and inflatable objects, and the music was a cacophony of noise that seemed designed to induce migraines. The so-called “magic of friendship” that they purport to embody is nothing more than a cynical marketing ploy to sell overpriced merchandise to unsuspecting children. It’s time for the public to wake up and realize that talent and artistry are qualities that should be celebrated, not ridiculed. The Rainbooms are a prime example of why the music industry is in such a sorry state.’" Sunset finishes, her face flushing with a mix of anger and hurt.

"I am INSULTED!" Rarity declares in frustration.

Rainbow Dash crosses her arms, her expression stormy. "Ugh! George Sullivan gives me the creeps!"

"But it doesn't matter now," Pinkie Pie chimes in. "His insults won’t stop us from celebrating Halloween."

"Hooo, yeah!" Apple Bloom exclaims. "I love Halloween! Pumpkins, costumes, candies, parties!"

"Halloween is one of my favorite holidays," Scootaloo adds with equal enthusiasm. "Spooky surprises, all different creatures, all that cool stuff."

Derpy turns to Fluttershy with a puzzled expression. "Of course, but… Fluttershy, I never knew that you liked Halloween."

"Well, I used to be scared of it when I was little," Fluttershy admits with a shy smile, "but I think I’ve grown to actually enjoy it."

Rainbow Dash gives Fluttershy’s shoulder a supportive pat, proud of her friend’s newfound courage. The Cutie Mark Crusaders, however, aren’t quite ready to let go of their mischievous teasing.

"Well… Are you sure you’re not just a little bit scared?" Sweetie Belle asks, her eyes twinkling with playful intent.

"By all the bat-winged vampires?" Scootaloo adds, her voice taking on a mockingly sinister tone as she imitates Dracula.

"Howling werewolves?" Apple Bloom howls dramatically, adding to the playful atmosphere.

"And wicked witches?" Sweetie Belle cackles, her imitation of a witch drawing giggles from the group.

Applejack chuckles, shaking her head at their antics. "Nice try, girls. But we’re not afraid of a bunch of ghouls or goblins. Well, Fluttershy might get a little jumpy around them. No offense, sugarcube."

Fluttershy simply smiles, her usual nervousness nowhere to be found. "Oh, none taken."

"Oh, come on," Principal Cadance chimes in, amused by the playful banter.

"Not even on Halloween?" Vice Principal Luna adds, raising an eyebrow with a smirk.

"Of course not," Pinkie Pie responds confidently. "Although I would like to go to a big Halloween party."

DJ Pon-3 suddenly perks up, her eyes lighting up with excitement. "Well, there’s one at the Canterlot Planetarium. It’s totally decked up!"

The reaction is immediate. Everyone except the Rainbooms gasps in shock, their eyes wide with disbelief.

"DJ?!" Derpy exclaims, her eyes widening in surprise.

"YOU CAN TALK?!" Flash Sentry blurts out, his flabbergasted expression echoing the thoughts of everyone around him.

DJ Pon-3 nods enthusiastically. "Yep. Thanks to a special spray can Starlight made."

Starlight holds up the can of Speech Spray, a proud smile on her face.

Principal Celestia, still processing this new revelation, simply nods. "O-kay… But, yes, you girls should go to Canterlot Planetarium. They can throw quite a big party there."

"And our Twilight just happens to love the Planetarium," Rainbow Dash adds with a grin.

"Oh. Alright. Then I guess we’re off to the Canterlot Planetarium." Twilight says affirmingly.

With that decision made, the Rainbooms, Spike, Starlight, and Trixie prepare to leave. As they turn to go, Flash Sentry watches Twilight with a dreamy expression, clearly captivated by her presence. The group leaves the mall, their spirits lifted as they head to the Canterlot Planetarium.

Later, the Rainbooms arrived at the Canterlot Planetarium. From the moment they stepped out of the crisp autumn air and into the building, they were greeted by an extravagant display of Halloween decor, with cobwebs clinging to corners, eerie lights casting shadows across the walls, and the faint sound of haunting music drifting through the air. The girls, along with Spike, were immediately captivated by the spooky atmosphere, their eyes wide with wonder.

"Whoa! This place is really looking spooky," Rainbow Dash remarked.

"And full of Halloween fun!" Pinkie Pie added.

As the group dispersed to explore and enjoy the festivities, Twilight noticed Sunset seeming a bit off. There was a slight slump to her shoulders, a hint of melancholy in her eyes that didn't quite match the festive surroundings. Concerned, Twilight exchanged a glance with the others, who had also noticed the change in Sunset’s demeanor. They quickly regrouped, surrounding their friend with expressions of gentle concern.

"Sunset? Are you okay?" Twilight asked.

Sunset, caught off guard, forces a smile. "What? Oh, yeah! Totally! I’m fine. Why?"

Starlight Glimmer wasn’t convinced and pressed further. "Well, you just look like something’s bothering you."

For a moment, Sunset looked around at her friends, all of whom were watching her with expectant eyes. Realizing she couldn’t keep her feelings to herself, she let out a weary sigh, the forced smile fading away. "Well," she began hesitantly, "I’ve been having a few doubts about Halloween this year."

Rarity tilted her head, concern deepening in her eyes. "Whatever do you mean, Sunset Shimmer? Is something wrong?"

Sunset hesitated before answering, clearly struggling to find the right words. "I just don’t think Halloween costumes are really my kind of thing this year," she admitted. "I've been wanting to have some real spooks and scares this Halloween. I just thought that if a corrupted person uses something possessed by Equestrian magic again, we might make them stop with really convincing Halloween frights."

The rest of the group was taken aback by Sunset’s words. They hadn’t expected her to be so troubled by something that usually brought so much joy.

"Well, don’t let it bother you too much, Sunset," Applejack said in a comforting tone. "We haven’t seen any dark magic happening yet. So we might as well enjoy ourselves."

Starlight Glimmer nodded in agreement, giving Sunset a reassuring smile. "Yeah. Remember what I said to you about focusing on the positive?" She reminded her.

Sunset looked around at her friends, who all wore expressions of support and understanding. The weight on her shoulders seemed to lighten a bit, and she returned Starlight’s smile with one of her own, albeit small and tentative. Later, as the group wandered through the planetarium, they found themselves examining a series of framed pictures depicting various classic Halloween monsters. Each picture was accompanied by a detailed description of the creature’s lore. The girls were fascinated by the artwork: Rarity found herself drawn to a picture of a mummy, Fluttershy studied a ghost, Applejack was intrigued by a Frankenstein-like creature, and Sunset examined a swamp monster with keen interest. Pinkie Pie giggled at a depiction of a werewolf, Twilight scrutinized a witch, Rainbow Dash admired a vampire, Trixie was intrigued by a dinosaur, and Starlight focused on an alien.

As they were lost in the eerie beauty of the pictures, a young woman with raven hair and dressed in a lab coat passed by behind them. Fluttershy’s eyes lit up with excitement as she recognized the familiar face.

"Hey! I know that girl! That’s my friend, Sarah Scientist!" Fluttershy exclaimed, her voice brimming with joy. "I went to elementary school with her. I think I should go see her."

The rest of the group nodded in agreement, smiling at Fluttershy’s enthusiasm. Fluttershy wasted no time in catching up to the woman. "Hey, Sarah!" she called out.

Sarah turned around, her face lighting up with recognition. "Fluttershy? Whoa!" The two friends embraced warmly, their reunion filled with genuine affection. "How are you?" Sarah asked, then glanced over Fluttershy’s shoulder to see the other Rainbooms. Her eyes widened in surprise and admiration. "Oh! The Rainbooms! Wow! Big fan," she said, her voice tinged with excitement. Her gaze landed on Twilight, and she gasped. "You must be Twilight Sparkle! I’ve heard so much about you."

"She became the Princess of the Fall Formal some time ago, Sarah," Fluttershy proudly informed her friend.

Sarah’s eyes sparkled with admiration. "Well, that is amazing! Oh! Fluttershy, I heard that you’re a member of the Rainbooms! I even saw you at the parade in Equestrialand."

The Rainbooms couldn’t help but smile at the warm praise, feeling appreciated and recognized. "So, came to enjoy our little Halloween party?" Sarah asked, her tone turning playful.

"You bet!" Pinkie Pie exclaimed. "I just love parties!"

Twilight, noticing Sunset standing slightly apart from the group with a half-smile, decided to speak up. "Uh, Sarah? Sunset Shimmer told us that she’s been anxious about this Halloween, and she said that she wanted to have a convincing Halloween costume this year." She glanced at Sunset, who nodded to confirm her words.

Sarah’s expression shifted from excitement to thoughtful consideration. "Well, you’re in luck," she said after a moment. "I’m not just a scientist, but I’m also an inventor. I think my latest creation can fix Sunset’s problem. Follow me."

Intrigued, the girls and Spike followed Sarah as she led them deeper into the planetarium.

Now, Arthur and Winston sat in two chairs outside in the backyard of Arthur’s house. The two were facing each other, the cool night air wrapping around them as they engaged in a quiet conversation.

"So, Uncle Arthur, Sarah has some invention that can make really convincing Halloween costumes for the Rainbooms?" Winston asked.

Arthur gazes at his nephew with a mysterious smile. "Well, yes… and no," he replied, his voice carrying an air of suspense.

Winston’s brow furrowed in confusion. "What do you mean?"

Arthur leaned forward slightly, lowering his voice as if sharing a secret. "Sarah’s invention was going to put the Rainbooms in something, but it wasn’t costumes. Oh, no, this invention is way different. You really wanna know what it’s going to do?"

Winston nodded eagerly, his curiosity piqued.

Arthur’s smile widened, his eyes gleaming with excitement. "They were going to be transformed."

"Transformed?!" Winston gasped, his voice filled with shock.

"Transformed!" Arthur answered, clearly enjoying the suspense. "Into actual Halloween monsters."

Winston’s eyes widened with surprise, his mind racing with the implications of what his uncle had just revealed.

In a dimly lit, invention-filled laboratory of the Canterlot Planetarium, the Rainbooms found themselves awestruck by the sight before them. The room was a marvel of technology and creativity, filled with strange gadgets, blinking lights, and contraptions that seemed to defy the laws of physics. Everywhere they looked, there were inventions that hinted at endless possibilities, each more intriguing than the last.

"Whoa!" "Wow!" "Awesome!" "My goodness!" "Well, I’ll be!" "Cool!" The exclamations from the group echoed around the room as they took in the sight of the lab. Each girl was caught in her own moment of amazement, their eyes wide with wonder.

Sarah smiled at them. "Yes, it is cool," she acknowledged, her tone slightly serious. "But be careful. You never know what these types of inventions can do."

The Rainbooms, sensing the underlying seriousness of her words, nodded in agreement. They promised to tread carefully, understanding that while the inventions around them were fascinating, they also held the potential for unpredictability. With that understanding, Sarah led them further into the lab, the group following closely behind, their curiosity piqued even more.

As they walked, Rarity’s keen eye for beauty and glamour caught sight of something particularly captivating—half of a golden disk displayed in a glass case - It’s the other half of the disk MacWright tried to find. It shimmered under the laboratory lights, its surface reflecting a mesmerizing glow that immediately drew her in. "Oh! Shiny," Rarity exclaimed. "Hey, Sarah! What is this fabulous gold relic you’ve got?"

Sarah paused, turning to look at what had caught Rarity’s attention. A smile played on her lips as she explained, "That is half of the Gold Disk of Lycidias, a clue leading to a treasure called the Zodiac Stone—a powerful artifact that can grant ultimate power to whoever makes contact with it."

The revelation hung in the air, each of the Rainbooms processing the significance of such an object. Trixie couldn’t contain her excitement. "Ultimate power? With that kind of capability, my magic skills could be stupendous!" she exclaimed.

Sarah chuckled softly at Trixie’s enthusiasm. "Yes, well, unfortunately, I was only able to find one half of the disk," she admitted, a hint of regret in her voice.

Rainbow Dash thought for a moment before speaking up. "Well, would you like for us to find the other half and the Zodiac Stone? We happen to have had a few adventures like that in our time," she offered.

Sarah’s face lit up with delight at the suggestion. "That is so generous of you! And brave!" she said, clearly touched by the offer. Without hesitation, she carefully retrieved the disk from the display case and handed it to Twilight, who tucked it securely into the pocket of her pleated skirt. With the disk now in their possession, Sarah beckoned them to continue following her through the labyrinth of the lab.

As they made their way deeper into the lab, Sarah led them to an area dominated by a massive, futuristic-looking structure—a gigantic sterilization chamber that looked like something out of a science fiction movie. The girls exchanged curious glances as they took in the sight of the enormous device.

"Behold! The transformation chamber," Sarah announced. "It can transform anyone into a different species. Any kind of species you want."

The Rainbooms were taken aback by the revelation, their minds racing with the possibilities that such a machine could offer. Sunset, still harboring her earlier feelings of wanting something more intense for Halloween, perked up at the mention of transformation.

"Sunset, you said you wanted to have real spooks this Halloween, right?" Sarah asked, a knowing smile on her face.

Sunset nodded, her interest piqued. "Yep. So?" she prompted, eager to hear what Sarah had in mind.

Sarah’s smile widened as she revealed her plan. "So… I just thought—instead of wearing a monster costume, you could be what the monster costume is."

Twilight Sparkle’s eyes widened in realization. "Wait. Are you saying—?"

"That’s right, Twilight," Sarah confirmed. "I’m going to use the transformation chamber to turn you all into real monsters. For real."

Sunset’s eyes sparkled with excitement. "You mean we’re going to get to be actual Halloween monsters this year?" she asked, her voice tinged with anticipation.

Sarah nodded, and the smile that spread across Sunset’s face was one of pure joy. "This… is… PERFECT!" she exclaimed. "Actually being a monster instead of wearing costumes is just what I needed this year. Who’s with me?"

Twilight was the first to step forward. "I’ll try it out. I think being a Halloween monster would be interesting," she said thoughtfully.

Rarity, ever the fashionista, couldn’t resist the idea of combining fright with style. "I’d look spooky and monstrous, but also fabulous at the same time," she agreed with a confident smile.

Applejack, always practical but never one to shy away from an adventure, shrugged. "Ah, what the hay. I guess I could give it a try," she said, her tone nonchalant.

Fluttershy, ever the timid one, hesitated for a moment before speaking. "Well, if you go, I’ll go. I just hope we don’t become too scary," she said softly, her voice tinged with concern.

Pinkie Pie, as always, was bursting with excitement. "Ooh! Ooh! I wanna go too! I bet being a monster will be so much fun!" she said, practically bouncing on the balls of her feet.

Rainbow Dash, competitive as ever, set her terms. "Well, my monster look better be mind-blowing. I’ll trust you all," she said, crossing her arms with a smirk.

Starlight and Trixie, both intrigued by the idea, quickly voiced their agreement. "I’m in!" Starlight declared, while Trixie added with a flourish, "Count me in too."

Twilight turned to Spike, who had been quietly observing the conversation. "Spike?"

The little dragon-turned-dog considered for a moment before shaking his head. "Well… I’m actually fine with my skeleton costume. You girls can go ahead," he said, his tone light.

Sunset gave him a reassuring smile. "Alright, Spike. We shouldn’t take too long."

With their decision made, the Rainbooms exchanged determined looks before turning back to a smiling Sarah. The Rainbooms were ready to be transformed.