Author's Note

6-D Pegasus, this can go one of two ways.

Spike became a clone of Rainbow Dash?

"Hi I'm Rainbow Dash," Spike waved from within his poorly-made Rainbow Dash costume. "Look at me I fly and stuff."

"Rainbow, we know," Applejack rolled her eyes. "This is the third time you've said that."

Rainbow Dash landed in front of her with a whump. "Said what? Just got here, were you and Spike saying something 'bout me?"

"WOAH TWO RAINBOW DASHES," Twilight emerged from whatever rabbithole she'd dug herself into earlier that day... much to Fluttershy's bemusement. "I've seen this in a movie before, what was that line again..." she rubbed her chin before pulling out the zappy bits of an orbital strike cannon. "Well, whatever, I don't remember the line but I do have this! Now, Rainbow Dashes, line up so I've got a good look at both of you."

"Twilight, we can talk about this," Spike raised his claws. "It's me, Spike. I'm just wearing a costume and--"

"CAN IT, RAINBOW NUMBER TWO."

"Seriously Twi, look--" Spike removed the hood he had up. "See?"

"TAHT RAINBOW'S A CHANGELING!" Applejack barked. Typo and all. Twilight saluted and grimly pivoted the aim of the orbital strike cannon toward Spike.

Spike was promptly yeeted all the way to Canterlot.