"Cutie Marks. Cutie Marks never change. That's what mah sister an' her friends told me when ah was a lil' filly. Eeyep, as Ol' Macintosh would say 'fore the reckonin' came down on Ponyville like a tractor-trailer full o' hungry hippos. Back 'fore things went all haywire you gotta earn your cutie mark. You do a million-and-one things and eventually you find somethin' you good at and BAM! Cutie mark! Now? All you gotta do's do some stupid things like writin' your name on your hand and make some almighty ponies happy to get a cutie mark as big as the sun. Well, this filly ain't playin' this game. No siree. This---"
"Apple Bloom! What have Uncle Orange and I told you about having soliloquies in the closet after dinner? And give me that dreadful candy cane and put a real cigarette in your mouth like a posh Manehattan pony, for Celestia's sake!"
"Oh no, Auntie Orange, you said---"
Suddenly, fifty-seven ponies magically appeared in the Manehattan apartment that Apple Bloom lived in since Applejack and Big Macintosh disappeared. They all had different coats, manes, personalities and names. However, they all had the same cutie mark.
"You called?" said the fifty-seven ponies at the same time. They then started having an argument with each other and started sending each other to the moon. Like the original owner of the cutie mark they all had power over the sun and all of Equestria, but none of the manners. Worse yet, anypony can obtain this power simply by performing small tasks that even Snips and Snails could do. In fact, they both got new sun-shaped cutie marks and then proceeded to burn each other to death with their new powers.
Apple Bloom tried her best to ignore the Celestia-tier ponies in the living room and looked longingly out the window. In the skies flew one-hundred and ninety-two rainbows, all made by ponies who "earned" a rainbow-lightning cutie mark. One of them, in particular, was writing "suck it, blank flank!" directly in front of Apple Bloom's field of vision in a silvery rainbow motif. Apple Bloom looked at the clock---eeyep, it was time for Silver Spoon's daily mocking again. Ever since she lost Diamond Tiara in a magical duel resulting from their argument over whether they should take art classes and "earn" a new cutie mark she has had no purpose in life but to harass blank flanks.
There's only one blank flank in Equestria now.