ENDING A (CHAOS):
The rainbow dress is fabulous. Too fabulous, as it turns out. The instant that Rainbow Dash slips it on, she disappears.
That’s abnormal. You’ve been here a while and this is the first time a pony has just spontaneously disappeared right before your very eyes.
Rainbow Dash reappears moments later in the center of town… sporting a horn and wings.
The others gather around her, mouths agape. No one other than Master Kenbroath Gilspotten Heathspike has ever seen an alicorn before, and it falls to him to explain to the others exactly what’s happened.
“Ahem, it appears Rainbow Dash has reached a style so incredibly unobtainable that she’s ascended to alicorn.”