Author's Note
Like its prequel Pinkie Pi, this story takes place in an alternate universe where Fluttershy (AKA Fluttersky) has Rainbow Dash's personality while Rainbow Dash (AKA Rainbow Drab) has hers.
I actually forgot how the episode was supposed to go, so please don't hate me for some mistakes. However, this story is presented as-is (that means I had no editing!) and I will be making no changes whatsoever after it is published.
I know this story wasn't very exciting, but after reading the prequel by Blu_Ray I decided to give it a shot. 
Rainbow Drab
Fluttersky's long pink mane blazed through the warm afternoon sky like a comet as she raced through the air above Ponyville. She had just left Pinkie Pi's house, and was coming back with some exciting news to tell the rest of her friends. Or friend I should say, since Rainbow Drab was the only one left to tell.
I've already been to Twilight Sparkler's, Apple Jewel's, Rakity's, and I just left Pinkie's. Now to tell my official cheerleader!, she thought as she made a quick landing by her blue furred, rainbow-haired pegasus friend.
Dust flew everywhere as Fluttersky's hooves buried themselves in the ground from such a fast, hard landing. Rainbow Drab, a little frightened about her friend's sudden landing, was curled up into a little ball. Her head poked out a few minutes later, and realizing it was her friend, she quickly stood up normally.
"Uh... Fluttersky? Could you please... uh... do that a teeny-tiny bit more quiet next time? I mean like, if you want to..." Rainbow Drab's quiet, shy voice trailed off into mumbling.
"I have no idea what you just said! But hey, guess what?" Fluttersky said loudly, her wings flapping quickly as she hovered in front of the rainbow maned pegasus.
"Uh, wh-"
"I got into the Cloudsdale Talent Show! Woo-Hoo! Yeeeees! And you know what? I want to nominate you as my official cheerleader for when I do my final performance!" Fluttersky danced around in the air, doing some flying tricks as she celebrated.
"Me?! B-b-but, Fluttersky, you don't want m-m-me, do you?! Listen, I'm proud of you and all, but I can't be your cheerleader. Remember flight school? Remember my stage fright? Please don't make me a cheerleader." Rainbow Drab pleaded.
"WHAT?! Rainbow Drab, you can't back out! I really do need you, okay? All you're going to do is that when I fly up there, and when I start to do my super spectacular totally awesome one - of - a - kind skilled moves up there, you just gotta stand up and say 'Yay!' or something." Fluttersky said, calming her tone of voice so that her friend would feel more comforted.
"Fluttersky, I don't feel comfortable doing-" Drab began.
"Well, wait a minute! Who said you were doing it alone?" Fluttersky said.
"Is Rakity going? What about Apple Jewel? How about Twilight Sparkler, or Pinkie Pi, or even-" Rainbow's face lit up with hope.
"I meant, like, you can have your new friend Bob up there." Fluttersky said,her facial expression looking bored.
"Bob? But I don't kn-" Drab protested.
"Bob! He's your new imaginary coltfriend!" Fluttersky said in the sky, now hovering above Rainbow Drab.
Rainbow sat down. Her head hung low, and her eyes closed. Slowly exhaling, she whispered, "Fine. I'll do it. If only I have a real pony to cheer lead with me."
Fluttersky wanted to facehoof herself, but she knew she'd have to save that for later. After being friends with five particular ponies, she had learned her way to survive them.
"What I mean is that, like, oh I don't know... Twilight Sparkler or somepony do some sort of spell to let others walk on clouds? Then I wouldn't be alone." Rainbow suggested.
Yep. Now it was time for Fluttersky to facehoof herself.
"W-w-what? What d-did I say?" Rainbow asked, her fumbled voice quiet and humble.
"Rainbow, look, we can't do that. Do you know how crazy that purple pony is?! She can't do a lot of magic! Now, if Pinkie Pi had a horn, sure. But not that sugar-hyped pony!" Fluttersky explained.
"Oh..." Rainbow sighed as she gave in. She wasn't one to argue with her friends.
"Okie - dokie! Now let's go. I want to show them what I've got!" Fluttersky said, her wings rocketing her into the sky.
Rainbow Drab whimpered, but slowly followed seeing she couldn't back out now. While trying to make herself feel better about having stage fright, she came across a weird thought. What if in another dimension in an alternate universe Fluttersky and I traded personalities, and if was the one preforming and she was my cheerleader? That would be very weird...
In an alternate universe somewhere...
Rainbow Dash and Fluttershy's hooves hit the soft ground on the white, fluffy cloud.
"Rare- Rarity?" Fluttershy mumbled, gasping.
Confused, Rainbow Dash turned her head. Her other three friends, excluding Rarity, were in a hot air balloon.
Pinkie Pie was the first one to get out.
"No Pinkie! Don't ju- why aren't you falling?" Rainbow was extremely confused as to why the earth pony could stand on the cloud. Only pegasi could do that.
"I used a spell so that we could stay on the clouds! And Rarity, well, I gave her these wings." Twilight Sparkle explained.
Suddenly Rainbow Dash noticed her stylish white unicorn friend hovering above her in the sky with huge butterfly wings making different faded colors on the ground.
"And we're you're cheer'in squad!" Applejack added.
"Yay." Fluttershy mumbled, although her face showed she was very happy, and not to mention relieved.
Little did everypony know, Rainbow Dash was a little bit nervous. To make herself seem more brave she began to think about how great she was. (Good self-esteem is very important while preforming in front of others!) Suddenly, a very strange thought came across her mind. What if in another dimension in an alternate universe Fluttershy and I traded personalities, and if was the one cheer leading and she was the performer? That would be very weird...
