"What happened?" Twilight asked. "Why did this happen?"
"How're we meant tah know, sugarcube? We're just as confused as you." Applejack replied.
"But you gotta admit, this is pretty awesome!" Rainbow Dash yelled.
"Rainbow, darling. Just tell us how, exactly, this is meant to be 'awesome'?" Rarity asked. "Becausewe'retheonlycolourfulthingsformilesandwe'veswitchedcolours!" Pinkie Pie replied in one breath.
"It... It's scary! I don't like it." Fluttershy sobbed.
"We've got to get to the princess!" Twilight tried to sound confident, but instead sounded like she had something in her throat.

~one trip to canterlot later~

"It seems that when you defeated him, the spell that he cast sucked all the colour out of Equestria. The only reason we stayed colourful is that we have enough magic to stand up to the spell, but not fend it off completely." Celestia explained. The Canterlot throne room had 9 ponies and one draconequus sitting in it in a circle on rather comfortable chairs that Discord had conjured out of thin air. "We've all switched colours. I've got Applejack's, Discord has mine, Fluttershy has Discord's, Luna has Fluttershy's, Pinkie has Luna's, Applejack has Pinkie's, Cadence has Rainbow's, Twilight has Cadence's, Rarity has Twilight's and Rainbow has Rarity's."

"Pinkie! Discord! Stop giggling and actually try to help us!" Twilight snapped. The two had been whispering to each other and giggling for the past half hour.
"O-okay, Twilight, I'll try." Pinkie giggled.
"I'm sorry, your majesty," Discord sniggered. "But Lunashy has a wonderful colour pallette going on here." He pointed an eagle claw at the yellow and pink alicorn. Luna's aqua eyes sparkled with rage at the draconequus.
"You know, Discord, I might have been offended by that, if you weren't currently looking so ridiculous in my sister's colours." Luna retorted. She was right, though. Discord looked RIDICULOUS. His usually multicoloured body was snow white, and his short mane was aqua, green, blue and pink, as was the tuft of hair at the end of his snake's tail.
"Oh yeah, well-" Discord started
"ENOUGH!" Shouted Twilight and Celestia together.

Author's Note

Please feel free to correct any of my mistakes.

Sorry on the short chapter, I'll try to do longer next time.