Sonic High: Rainbow Rocks

by sonicdash759

Rating: everyone
Tags: Adventure, Crossover, Human
Length: 4076

Sequel to Sonic High fanfic

In the events after the fall formal, all of Canterlot High is having trouble getting back to normal. Even worse when 3 ominous new girls audition for the Canterlot High School Musical Showcase which has now become a Battle of the Bands and an intense one at that. Now to try and defeat the Dazzlings; Miles Prower, Dan Green, Amy Rose, Shadow, and a few new friends must call upon their otherworldly hedgehog friend to aid the Rainbooms in a sure fire defeat of the new threat to not only the school, but the whole world.

Published 1970-01-01 00:00:00 UTC
Last updated 2015-01-30 00:41:58 UTC

Strange Things

It was a sunny day at Canterlot High School. Almost everyone was excited for the upcoming Musical Showcase. A perfect time to catch up with friends and hone your musical skills. A friendly competition for all to enjoy.

And those who didn’t want to participate? That’s just fine! Canterlot High is a place of freedom, friendship, and harmony. It’s also the place where Mr. Kintobor now teaches Robotics and Mechanical Engineering. He’s become quite popular among the techies and other smart students due to the fact that he has built janitorial and hall monitor robots to make the school more productive and safe. At first Principal Celestia and Vice Principal Luna were unsure of this but they agreed to let the metallic assistants stay as long as they remained secret from other school districts.

“Do not fear, my fellow students. I am not disappointed with any of you but let’s try to put some more effort into those quizzes next time. You can’t get by in this life just by doing work, you have to learn from the experience,” Kintobor reminded before hearing his name on the intercom.

“Mr. Kintobor, please report to the Vice Principal’s office. Mr. Kintobor, please report to the Vice Principal’s office. Thank you.”

“While I’m gone, I want you to look over those incorrect answers on the quiz.” he instructed the class before stepping on his Segway-like mobile and heading for said office.

“Thank you for coming, Kintobor. I’m not saying that you’re in trouble but I do have a few complaints from the students about the new hall monitor/security robots you built. Perhaps they may have some glitches?” Luna asked.

Kintobor sighed. “I am planning to upgrade and fix some errors this weekend. Spare me the details so I can be sure of what I need to improve,” he said.

Luna pulled out a rolled up list out of an empty filing cabinet. “Let’s see...some students have been scared and even scarred due to their appearance, One student was nearly burnt by jet exhaust, one of the robot’s fingers are too sharp, one student’s hand was nearly broken by sheer grip, the so-called “Motobugs” nearly sent a student to the hospital, the flying “Buzzers” make too much noise and are too distracting to even be on school grounds, the school closing due to temporary renovations was actually an evacuation thanks to the hall monitor robot going completely haywire, and (hopefully) last but not least, the new student ATM’s keep malfunctioning and send one student’s deposits to another student’s account,” she finished before giving Kintobor an annoyed look.

Said man sat there, shocked before finally speaking. “Yikes...Not to worry, Vice Principal Luna. I assure you that I will do everything in my power to make these robots safe and helpful. Actually, I think the Buzzers weren’t even helping in the first place...same with the ATM’s. If you want, I could start right now! I don’t have anymore classes for the rest of the day anyway,” he said.

Luna nodded. “Do not bring the robots back until you are absolutely 100% sure that they can function properly,” she instructed before handing him the list.

Kintobor nodded back before rolling the list up and exiting the room only to stop and peek in Principal Celestia’s office where Vice Principal Luna now entered along with 3 unfamiliar girls. “Hm. New students?” he whispered to himself.

The 3 girls grinned before breaking into song which seemed to put the 2 Principals into a trance…

Kintobor stepped onto his mobile and pressed a button. “Note to self: notify Miles Prower about any...strange activity,” he said before driving out of the school, robots following.

Battle of the Bands

In the cafeteria, Miles Prower, Knuckles, Amy Rose, Blaze, Silver, and Shadow all sat together near their 6 new friends from the Fall Formal event.

“So let me get this straight...Before the dance, this whole school was divided but afterwards, everyone was brought together all because of some magical pony princess and supersonic blue hedgehog from different worlds?” Blaze asked.

Tails nodded. “Correct. I know this all seems pretty weird since you and Silver transferred from another state, but it’s all true! Ask Sunset Shimmer, Applejack, ask anybody,” he answered.

Amy glanced over to the girls and blinked. “Wait. Where is Sunset Shimmer?”

“She’s out giving some new transfer students a tour of CHS,” Shadow answered.

“Hey speak of the devil...no offence.” Knuckles frowned.

“None taken...yet again.” Sunset Shimmer said as she sat down with her friends.

Applejack gave a warm smile as she turned to face her. “So? How was the tour?” she asked.

Sunset frowned. “I-I don’t know. I-I mean these girls...they were...there was something off about them.”

“Like off like this? Or off like this?? OOH! Or like-” Pinkie Pie asked, making faces with her food before being cut off by Rainbow.

“Maybe we should just let HER tell us,”

Both girls smiled and turned back to Sunset, a carrot suddenly coming loose from Pinkie’s mouth.

All eyes were now on the fiery-haired girl.

“That’s just it! I can’t put my finger on it! They just acted sorta...strange around me,” she paused, showing a saddened expression. “Maybe someone already talked to them, told them about what I did. So much for making a good first impression…” she sighed before burying her head in her arms.

The whole table stared at her, feeling sympathy...well…

“Uh huh.” Fluttershy said, smiling.

The whole table turned to her with questionable expressions.

The cream-skinned girl noticed. “Oh, that’s probably not it!” she corrected herself before nervously shrinking down to the table.

Suddenly, the main doors burst open and 3 girls in punk/tough looking clothing entered, vocalizing, all eyes on them.

“We heard you want to get together.

We heard you want to rock this school.

We thought of something that is better.

Something that changes all the rules.

Why pretend we’re all the same,

when some of us shine brighter?

Here’s a chance to find your flame!

Are you a loser or a fighter?

Me and you, you and me,

why don’t we see who is better?

We don’t have to be one in the same thing!

Oh what’s so wrong with a little competition?

Are you afraid of failing the audition?

You’re a star and you should know it!

Yeah you rise above the rest!

It doesn’t matter who you hurt

if you’re just proving you’re the best!

(Ah Ah-ah-ah!)

Battle!

You wanna win it!

Let’s have a battle!

Battle of the Bands!

Let’s have a battle!

We’ll go all in it!

Let’s have a battle, battle, battle

Battle of the Bands!”

The whole cafeteria was now arguing and yelling at each other, practically at each other’s throats!

“I can beat you!” one girl shouted.

“Ha! You wish!” said another.

“I SO WANT THIS!” Trixie yelled.

“NOT IF I GET IT FIRST!” a guy threatened.

Now everyone had joined the 3 girls in song, pointing fingers, shaking fists, threatening to hit, etc.

Well almost everyone. Sunset Shimmer and her friends sat at their table, looking at the chaos with confused, scared, and surprised expressions.

“Me and you, you and me,

why don’t we see who is better?

We don’t have to be one in the same thing!

Oh what’s so wrong with a little competition?

I’m going out and winning the audition!

BATTLE!

We wanna win it!

Let’s have a battle!

Battle of the Bands!

Let’s have a battle!

We’ll go all in it!

Let’s have a battle!

Battle!

Battle!

BATTLE OF THE BANDS!!”

A mysterious green fog shrouded the room as everyone else continued to argue and turn against one another.

“OH! They’re THAT kind of off!” Pinkie realized.

After lunch, the two groups of friends walked together in the hallways, having an uneasy feeling about what they had just witnessed.

“Those 3 are definitely in possession of some kind of dark magic. How else can you explain what happened back there??” Sunset Shimmer questioned.

Applejack smiled. “Don’t worry y’all! We let Principal Celestia know about this, and those girls will be kicked to the curb in no time! Last thing she needs is another CHS event almost ruined by some power-crazed lunatic!” she said before realizing something. “Uh, no offence.”

Sunset Shimmer shook her head. “None taken.”

“Dark magic? I find that very hard to believe,” Principal Celestia said, peeking out through a crack in her blinds then turning to the group. “Those girls came into my office earlier and were absolutely delightful.”

Vice Principal Luna scoffed. “Perhaps Sunset Shimmer and Shadow are just eager to make somebody else a bad element so that their actions at the Fall Formal will become old news.” she deducted.

“We can see why you might think that but-”

“That is not what’s happening! We saw this all go down in the cafeteria too!” Rainbow Dash explained.

“Yes but isn’t your band supposed to be part of the musical showcase?” Celestia asked.

Rainbow Dash gritted her teeth. “...Yes.”

“Perhaps you’re all just jealous that The Dazzlings will steal your spotlight.” Luna deducted again.

“The Dazzlings?” Knuckles and Applejack both asked.

“It’s the name of their musical group. That’s why they came by my office earlier to sign up for the showcase. Even sang a little song to Vice Principal Luna and I,” she explained.

“They did??” Applejack asked.

“Yes, and we think that having a Battle of the Bands is a marvelous idea,” Celestia finished.

Everyone suddenly noticed that both principals’ eyes appeared to change color…

Later on the front lawn of the school, Shadow and his group had sat down, unsure of what to do next.

“They’ve gotten to the Principals too...this can’t be good,” Shadow said.

Tails pondered. “The last time something like this happened, Princess Twilight and Sonic were in our world.

Knuckles nodded. “Some time has passed but even if the mirrors were open, it’s probably a one-way entrance!”

Shadow sighed. “If only I still had that Chaos Emerald. We could hook it up to something and try to send Sonic a message to return.”

Suddenly, Mr. Kintobor ran over, panting. “Miles! Miles Prower! I’ve been looking for you! We have a mutual problem!” he announced.

Tails sighed. “Is it about the Dazzlings? If so, then we noticed...Wait a second! Eggma-er Kintobor! I think we could use your help!” he said.

Blaze tilted her head. “Who’s this?” she asked.

“I am Ovi Kintobor! The one and only teacher specializing in robotics and machinery at CHS. And you two must be Blaze and Silver, the recent transfer students from out of the country. It’s a pleasure to meet you both,” he said.

Blaze and Silver smiled. “Uh...thanks.”

“Now Miles, you said you needed my help?” Kintobor asked, turning back to said student.

Tails nodded. “Do you think you can build a portal? Just the basic construction! I’ll handle getting it to work,” he asked.

Kintobor raised an eyebrow. “What for? Wait let me guess, The only way things will go back to normal is if you bring Sonic the Hedgehog back into our world just like how the girls over there are talking about bringing back Twilight Sparkle to face off against the Dazzlings and defeat them?” he asked.

Tails was surprised. “Uh...exactly. How soon can you build it?”

Kintobor stepped onto his mobile and speed off, coming back a few minutes later with a portal gate! “This is a prototype I finished a few months ago. I never actually got it to work but if you think you can do it, knock yourself out.”

Tails beamed. “Sweet! Move it over to the statue! Knuckles, bring me some jumper cables! Shadow, prepare a note! Meet me back here as soon as possible!”

Meanwhile...

Meanwhile in the dimension of Mobius, Sonic the Hedgehog and Miles “Tails” Prower were soaring through the skies in Tails’ trusty bi-plane, The Tornado.

“Hey Tails, How much long till we reach Green Hill?” the blue hero asked.

The two-tailed fox nodded. “We should be there in 2 minutes,” he answered.

Sonic sighed, rubbing his nose with a finger before noticing something gliding down from the clouds. “Whoa! What’s that?” he wondered.

Tails noticed as well and flew the plane over for Sonic to grab the object.

Sonic unfolded the paper airplane and began to read the note aloud.

“From your friends at Canterlot High.

This may seem sudden and we hate to bother you if you were in the middle of something important but it looks like we’ll need you to come back and help us again. These 3 mysterious girls suddenly came to CHS and began to sing, turning all the students against each other and changing our upcoming Musical Showcase into a Battle of the Bands. All of us, including Twilight’s friends, think that the trio is up to something.

Find a way back into our world as soon as possible. If they can convince the entire school, even the Principal and Vice Principal, to rival one another, there’s definitely something off about them.

~your friends at CHS.”

Sonic grinned. “Sweet! Another adventure!”

Tails frowned. “Hmm…able to convince by song…Those girls sound a lot like Sirens!”

Sonic raised an eyebrow. “Sirens?”

Tails nodded. “Sirens are beautiful but dangerous creatures. Kinda like mermaids but they use their voice to entrance others and lead them to their demise. But these ones sound like the ones I read about back in Equestria. Apparently, they use their voices to feed off the positive energy of other ponies to increase their powers. But somepony by the name of…uh…Starwhirl the Bearded…used his magic to send them to another world. One where he believed that they wouldn’t be a bother to both Equestria and that other world. Looks like that other world is the one where that note came from! Hang tight, Sonic! We’re heading for my lab!” he announced.

Sonic did so as the plane descended.

Later on the ground, Sonic hopped off the plane the instant it touched down. After parking the Tornado, Tails walked into his workshop.

Sonic followed. “That was a long time ago. How come they’re popping up just now?” he asked.

Tails shook his head. “I don’t know nor does it matter. What really matters is that we go into that world and take out those girls before things get outta hand!” he said.

Sonic was surprised. “Whoa whoa whoa! First off, they said that I and only I go. And second, I don’t know how it would work out if there were 2 of you!” he reminded.

Tails frowned. “Oh right. We don’t want to cause a paradox of some sort. Anyways, just give me a few seconds to generate the portal.”

Sonic nodded and watched as Tails began to type on the control panel.

“Coordinates set…full power level…and start!” the two-tailed fox exclaimed as he pushed a lever.

The platform in front of the control panel lit up as time and space on the platform was ripped, opening the portal to Canterlot High!

Tails beamed. “It worked! Ok Sonic, keep in mind that those girls use their voice as their only weapon. Be careful!” he warned.

Sonic nodded. “Will do! I’ll be back soon!” he exclaimed before accelerating into the portal.

Party crashed

Sonic the Hedgehog burst through the statue’s base still in his normal form before colliding with a tree and falling to the ground.

Both Twilight’s group and Sonic’s group stared as the blue hedgehog transformed into his Canterlot High self. “SONIC!!” everyone happily exclaimed.

Sonic shook his head before getting to his feet. “Ugh…Long time no see guys. You too, Twilight!”

Twilight nodded and waved. “I had a hunch that you’d show up. Let’s head to Sugarcube Corner and we can discuss things there,” she said.

“Oh I do hate that you had to return in a time of crisis. We have so much catching up to do!” Rarity excitedly said.

“For starters, a certain blue-haired guitar player was just asking about you.” Applejack added.

Twilight lit up with excitement, blushing. “Flash Sentry was asking about me??” she then noticed all her friends staring at her with smug faces. Twilight composed herself and cleared her throat. “Isn’t that lovely,” she added before taking a sip of her beverage, trying to brush it off.

Rarity broke the awkward silence. “Perhaps you could give us just a little bit of gossip from your world?” she asked.

Spike spoke up with a doggie treat in paw. “She’s got an official title now!” he used the treat to pantomime a trumpet. “Doo doodoodoo! The Princess of Friendship!” he announced.

Sunset Shimmer smiled. “Wow. That’s really impressive! Guess you really were Princess Celestia’s prized pupil,” she commented.

“She’s even got her own castle!” Spike added with an arrogant smile.

Rarity grabbed Twilight by the shoulder excitedly, spilling some of the girl’s beverage on her magenta bowtie. “A CASTLE?? YOU HAVE YOUR OWN CASTLE?!” she asked, then noticing everyone staring at her. “Uh…Oh lovely!” she said, taking a cloth out of her bag and cleaning the mess.

“What about you, Sonic? Anything new from your world?” Rainbow Dash asked, turning to face the blue-haired hero along with everyone else.

Sonic smiled. “Just saving the world from Eggman and his evil life-sucking machine that almost destroyed the planet after his so-called “new friends” hijacked it and almost turned Tails into their personal robotic slave. To be honest, that had to be the most bizarre adventure I’ve been on,” he explained.

Everyone stared with confused, dumbfounded, shocked, and/or quizzical expressions.

Sonic gave a sheepish chuckle. “Hey, you were the ones who asked!” he reminded.

Twilight broke the silence. “Right…Anyway, what’s new here? I mean besides your school becoming the target for dangerous magical creatures from Equestria?” she asked.

Rainbow Dash put down her drink and pulled out her phone. “Yeah, so that isn’t exactly the only strange thing that’s happened since you left,” she said, pulling up a recorded video and playing it.

Everyone gathered around.

In the video, Rainbow Dash was seen playing a song with her band while pony ears, wings, and hair extensions began to appear.

Twilight and the others were stunned.

“Pretty sweet, huh? It happens to all of us when we play!”

“Play what? Instruments? I don’t know about the rest of you but that just sounds ridiculous!” Knuckles said.

Twilight pondered. “My crown was returned to Equestria but some of its magic must’ve remained here at Canterlot High! Now that we’re all back together, we can use that magic on the sirens just like how we were able to use it on Sunset Shimmer when she turned into that horrifyingly awful winged monster!” she said before realizing something. “No offence.”

“None taken. Heh, I’m used to it.”

Sonic grinned. “Guess I see no reason to be here then now that you girls got it under control! Although I will stick around to see those three villain wannabes get blasted by you girls!” he commented before taking a bite out of a chilidog.

Rainbow Dash stood up, just as pumped up. “They’ll never even know what hit them!” she exclaimed before throwing chops, kicks, and punches at the air, only to be stopped by Applejack’s waiting hand.

“We’ve got nothing to worry about now that Twilight’s back!” the cowgirl said.

Fluttershy frowned. “Oh…I’m pretty sure I can find something to worry about. But it won’t be the sirens!” she suddenly perked up.

Silver let out a chuckle.

“The sooner we do this the better!” Twilight said before turning to Rarity and Sunset Shimmer. “Any idea where the Dazzlings might be?”

Both girls shrugged.

Pinkie Pie got Twilight’s attention by waving frantically. She rushed to finish her drink then let out a refreshed “Ahh” before speaking. “There’s a big party tonight for all the bands who signed up for the showcase! That would include the Dazzlings!” she said, digging out any extra cream from her drink with the straw.

Everyone smiled. “Looks like we’ve got a party to crash,” she said before cleaning Pinkie Pie’s face with a napkin.

Sonic grinned. “Hey! That’s my line!” he joked.

Later in the gym, all of the bands were gathered but instead of friendly chatting and mingling, students were threatening and annoying each other, gossiping and insulting one another.

Sonic’s group had gathered not too far from Twilight’s, being careful not to aggravate the other bands.

“Oh man…even the air feels like hatred. Those Dazzlings must’ve really roughed up the school huh?” Sonic asked with a spare chilidog in hand.

Amy nodded. “I just hope Twilight and her friends can return everything to normal. I feel as if I’m getting…really…ANGRY!!” she flared up just as a band passed her. “HEY!! DID YOU JUST GIVE ME THE STINK EYE?! HOW ABOUT I GIVE YOU A BLACK EYE!?” she threatened, pulling out a large hammer and swinging it around!

Sonic went wide-eyed and quickly set his prized food down. “HEY! Whoa there! Take it easy, Amy! If I know Twilight, she’s got everything under control! She is the princess of FRIENDSHIP after all,” he reassured. “And I’m a hundred percent positive none of them looked at you funny. Just chill!”

Amy took a deep breath and exhaled, all her stress disappearing. “Uh…You’re right. Twilight’s the princess of friendship. She’s done this before…get a hold of yourself Amy,” she told herself.

Sonic smiled. “That’s better. Why don’t you just go over and have some punch or have a few cookies?” he suggested before going back to his chilidog. Upon taking a bite, he noticed that it was now made out of plastic! “Ow! What the heck?” he exclaimed before noticing Snips and Snails laughing with the real chilidog in hand! Sonic ran after them. “Hey! Get back here!”

Amy sighed. “Boys will be boys,” she said before noticing the doors opening to reveal the Dazzlings.

Sonic and friends noticed as well before gathering to watch the spectacle that was the defeat of the Dazzlings!

“THERE ISN’T GOING TO BE A BATTLE OF THE BANDS!” Twilight shouted, getting everyone’s attention. “We’re going to make sure of that!”

Sunset Shimmer and Sonic’s group all smiled confidently.

Twilight and her friends joined hands. “Alright girls, let’s do this!” she said before the girls closed their eyes, ready to unleash their harmonic energy.

“FRIENDSHIP IS MAGIC!!!”

Nothing happened.

Sonic and the gang all stared in surprise.

Rainbow Dash finally broke the silence. “Uh…weren’t there rainbows and lasers and stuff last time?” she asked.

“I don’t understand. We’re all together again. Why isn’t this working?” she wondered.

Blaze noticed Pinkie Pie’s mouth stuffed with cookies and chuckled. “It’s probably the cookies,” she whispered to Silver.

The Dazzlings grinned while everyone else in the room aimed stern and confused looks.

Spike poked his head out of Twilight’s backpack. “You really need to go ahead and do that whole “Magic of Friendship” thing now.”

Twilight frowned. “I’m trying Spike. I thought the six of us standing against the sirens would bring out the magic in us we needed to defeat them! That’s what happened before!” she whispered.

“Talk about throwing down the gauntlet! This group is obviously serious about winning! A little cocky though, aren’t they? Claiming we won’t win the battle! Seems they think they’ve already got this thing all locked up!” Adagio Dazzle exclaimed.

And that was enough to spark a school-wide riot!

“NOT THAT THE GREAT AND POWERFUL TR-R-R-RIXIE HAS ANYTHING TO DO WITH IT!”

“WHATEVER TRIXIE! WE’RE THE BEST BAND AT CHS!”

“No!! The Crusaders are gonna win!!”

Everyone began to scream and yell at each other, claiming that they were the best.

The green fog appeared again and the Dazzlings smiled as their red pendants appeared to absorb the fog!

Tails frowned nervously. “C-C’mon guys…Let’s go somewhere more friendly…” he instructed before leading his friends out.

Adagio grinned. “I think we finally found what we’re looking for! Or rather, IT found us!” she said.

Sonata Dusk just stood there, clueless.

Aria Blaze facepalmed.

“MAGIC!” she yelled. “Everyone else has fallen under our spell but not these girls. These girls are special.”

Aria Blaze suddenly noticed Sonic pulling a frustrated Amy away. “What about that blue one?” she asked, pointing to the blue blur.

Adagio turned and raised an eyebrow. “Something about him seems…odd. But it doesn’t matter. Just like every student here, he’ll fall eventually.”