So this is before Twilight Sparkle came to Canterlot High. The story is based off of Sunset repeatedly talking about another girl who went up against her in the spring and then near the end of the movie it being revealed as Rarity.

They saw it, everyone did, that Fall Formal when Sunset Shimmer won the crown again. Everyone clapped and cheered as she trotted onto the stage to claim her crown, but it was different this year. Last year when she had won it was the Spring Fling, the only other big dance in Canterlot High, she was so happy she was in tears. This year, Sunset won again as Fall Formal queen, anther high honor. But the thing was, a lot had changed since last year. Since she had won the first time she held a power over the rest of the student body, her behavior became reckless and cruel. Sunset Shimmer began to mock and purposely humiliate other students in such a way that people began to give in to her, nobody had even dare stand up to her in months. Two other girls were up for Princess this year, but Sunset had embarrassed one right out of school, and the other simply dropped out from fear. Now she graced the stage with her presence once again, her demeanor noticeably changed. Sunset flipped her hair back and gave the crowd a pearly white smile. The Princess put the golden crown on her head and sneered with glee. The yearbook editor ran up to her to take a photo, this year her pose was a grin with her finger pointing to her face as she laughed in victory.

"My beautiful fellow student body," she said to the crowd "I always knew I could be a princess! Last year it was such a beautiful surprise, but this year, wasn't it obvious? I mean come on! It's not like I have very much competition. Thank you everyone who voted for the obvious choice and for making me Princess Sunset Shimmer."

"Someone needs to take that girl down a peg," Applejack whispered into Rarity's ear.

Rarity nodded "I agree. Sunset Shimmer is taking it too far. Who knows how horrible she'll be this year?"

...

"Out of the way! Princess Sunset Shimmer is coming through," the turquoise eyed girl sneered at any passer by.

It had been three months since the Fall Formal. The student body were now beginning preparations for the Spring Fling which would come by in only a matter of months. The cafeteria was a buzz about who would be the princess, no one dared go up against Sunset Shimmer this year, not since she was getting worse and worse. Sunset sat down by herself in the center of the room, everyone went silent, all eyes were set on her.

"Did I give you permission to look at me?" Sunset scowled.

The cafeteria looked away, Rainbow Dash rolled her eyes as she did the same. She quickly after felt a tap on her shoulder.

"I saw that," Sunset Shimmer's voice came from behind her.

Rainbow froze but then furrowed her brow. "I'd be surprised that you can see anything these days considering how dim-sighted you actually are," she quipped.

The whole cafeteria gasped at the remark, Sunset only laughed.

"Oh! You think you're so clever don't you? Captain of every team huh? You think you're so loyal that you and your lame little friends still all sit together and not in the cliques? You think you're so popular you scruffy little grunge?" Sunset Shimmer scrunched her nose in disgust, her eyes staring at the back of Rainbow's head.

"Yeah I do," Rainbow Dash turned to face her, a new wave of gasps was sent through the room. "I think that considering I'm sitting with four amazing friends and you still sit all alone, I'm technically way more popular than you ever were."

Sunset Shimmer narrowed her eyes and bit her lip. "Rainbow Dash is it? Ah yes, Rainbow Dash. Hmm, a little colourful for my taste. Maybe we should add in a little brown!"

Rainbow Dash shrieked as Sunset dumped a full carton of chocolate milk onto her head. The cafeteria sat with their mouths hanging open. Rainbow's friends covered their mouths in pure shock.

"How dare you call me un-popular you little freak," Shimmer was right in Rainbow Dash's face right now.

Rainbow stared back at her straight on, she wanted to get her back so badly, she wanted to attack her right then and there. But she just couldn't, she couldn't find the courage, what else would Sunset do to her? She simply stood there, but she could tell that Sunset knew she was winning. As the chocolate milk began to drip down her face, Rainbow began to sink down, she'd never been so embarrassed.

Sensing her friend was at a loss for words, Applejack stood up. "Just leave us alone," she said and pulled Rainbow away, her friend followed.

Sunset Shimmer just laughed mockingly as the five girls stormed out of the room.

...

"Ugh she really got you," Rarity sighed as she wiped roughly to get the stain off of her friend's shirt.

The girls were in the washroom cleaning Rainbow Dash off.

"I can't believe I just froze up," said Rainbow.

"It's not a big deal Sugarcube," Applejack handed another wet paper towel to Rarity.

Fluttershy nodded "I think you were very brave to stand up to Sunset Shimmer like that. I could never do that."

"She sure is one snobby little Princess," Pinkie Pie agreed.

"More like a Royal Pain," Rarity smiled and the girls laughed.

Applejack sat up on the sink "Sunset Shimmer is really taking it too far. If she wins again this year, who knows what she might do? Some other girl needs to take her down this year!"

"But who could possibly match up to Sunset Shimmer? She's so popular and fashionable," Fluttershy blushed.

"Rainbow be a dear and stand still," Rarity frowned.

"And she's determined. She won't let anything get in her way," said Rainbow as Rarity brushed out her hair.

Pinkie nodded excitedly, her pink curls bouncing with her. "Oh, oh, oh! And whoever goes up against her would have to be super glamorous"

"Rainbow Dash! Stop moving, I'm almost done," grumbled Rarity "You should really brush your hair more."

"And whoever it is would have to definitely be nicer than Sunset. More humble than her too," pointed out Applejack.

Fluttershy nodded "I think since she would be princess, she would need to be kind and generous too."

"But where are we gonna find someone like that?" Pinkie Pie cried.

"Rainbow, I'm sorry but you'll just have to wear your hair up for the rest of the day. I'll be happy to help you out after school though," Rarity said only to realize that all her friends were staring at her.

"I think I know who," Rainbow grinned.

Rarity looked worried "Why are you all looking at me?"

...

"No, no, no, no, no!" Rarity cried "I simply could not run for Spring Fling princess."

A collective complaints rang out from her friends. They sat in their favourite cafe at their favourite table. Rainbow was wearing her spare gym clothes. Pinkie Pie ran up to the table with five cupcakes, one for each of her friends.

"Why not Rare?" Rainbow asked.

"Yeah," Pinkie beamed "I think you'd be perfect!"

"Well, it's just I have a lot of work in the shop and Opal hasn't been feeling well and-"

"Excuses, excuses," Pinkie interrupted her.

"Rarity, Sunset Shimmer has been terrorizing the school for a whole year now and look how horrible she is. Imagine if she wins again, and then again! The entire student body is in trouble," Applejack told her.

"Please Rarity," asked Fluttershy "Sunset Shimmer is a bully. You're our only hope."

Rarity shook her head "I don't know girls. How am I the only hope?"

"What other girl has fashion, leadership, kindness and bravery like our Rarity?" Rainbow nudged her in the arm.

Applejack smiled and nudged her other arm. "Not to mention generosity."

"Thank you girls. But as you said, she's horrible, what if I lose?"

"You won't lose," Pinkie told her.

'Yeah," agreed Fluttershy "Rarity you know we'll all be there to support you and help you beat Sunset Shimmer!"

The girls broke into a chorus of begging and pleading. Rarity bit her lip.

"Rarity, come on!" Rainbow stood from her seat. "Please, for me?"

The girls all sat in silence for a moment. The four looked expectantly to Rarity.

"You guys are right! Sunset Shimmer needs to be taken down!" Rarity smiled "I'll do it for you girls, and for Canterlot High!"

To be continued...