So this was a fanfic I started writing a long time ago and I just never got around to finishing it(or getting very far for that matter). The main characters are the CMC. I basically wanted it to be about them finding some type of magical waterfall that transforms the CMC into their future selves(I would love to see an actual episode like this is in the series). The twist was going to be that there "future selves" were not really their future selves, but idealized versions of their selves. So, Scootaloo for example, would be able to fly even though she would not have actually been able to. Anyway, this is as far as I went with it.

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It was a scorching hot summer day in Ponyville and the Cutie Mark Crusaders were seeking shelter from the heat in their clubhouse. They lay on the wooden floor of the clubhouse sweating and looking miserable until finally Sweetie Belle spoke.

“It’s so hot! There’s got to be something we can do to get some relief from this heat.”

“I know! Why don’t we go to the lake,” said Applebloom.

“Great idea,” Scootaloo said jumping up enthusiastically.

“Alright then, let’s grab our things and meet up at the lake.”

They parted ways from the clubhouse to retrieve the things they needed for the lake. When they arrived at the lake, it was full of other ponies, including Applejack, Pinkie Pie, Rainbow Dash, Rarity, and Twilight. All of them waved at them from the water except Rainbow Dash who was lazily drifting in the water.

Of course, everyone in Ponyville would be here, Applebloom thought to herself. She frowned.

They trotted over to them and said their hellos.

“It sure is a scorcher,” said Applejack.

“Yeah, no kidding,” replied Applebloom. “There is hardly any room for us in here.”

“Sure there is, right here next to your big sis,” Applejack said motioning her hoof right beside her.

Applebloom frowned and made her way towards the spot where Applejack had pointed. The water felt cool on her warm fur. She sunk down into the water until only her eyes were visible.

“Sweetie Belle, did you remember to bring sunscreen?” asked Rarity. 

“Yes Rarity,” Sweetie Belle said in a sarcastic tone while rolling her eyes.

Sweetie Belle quickly put the sunscreen on and attempted to rush into the water. Rarity used her magic to keep her on the shore and made her way out of the water.

“Hold on Sweetie Belle, let me make sure you didn’t miss a spot.”

Rarity used her magic to apply the sunscreen all over Sweetie Belle until she was blinding to look at.

“Okay, I’m good now, right?” asked Sweetie Belle looking rather annoyed.

Rarity nodded and they made their way back into the lake together. Scootaloo laughed and Sweetie Belle stuck her tongue out at her.

Rainbow Dash was floating in the water on her back wearing her trademarked black sunglasses oblivious to what was going on around her. Scootaloo entered the lake and stealthily swam up to Rainbow Dash until she was right next to her. At which point she rose up at of the water and used her wings to jump right on top of Rainbow Dash. Rainbow Dash and Scootaloo both sank into the water like stones. When they reemerged Rainbow Dash looked furious at Scootaloo who was now wearing her sunglasses. Scootaloo laughed.

“Scoota-!” Rainbow Dash said angrily, half choking on the water she had swallowed.

The other ponies laughed. Rainbow Dash sighed and smiled. She rubbed her hoof on Scootaloo’s head and said “Good one Scootaloo.”

Scootaloo handed Rainbow Dash her sunglasses back. She attempted to wipe the water away and put them back on. She floated for awhile before bumping into another pony.

“Sorry, about that.”

“Wow, it seems like all of Ponyville is here,” said Scootaloo.

“Yeah, no kidding,” Rainbow Dash replied, sounding rather annoyed.