Rainbow Dash hardly ever walked anywhere. Applejack noticed this and, out of the blue, decided to make a bet with Rainbow: "If you can go the whole day without using your wings, I'll let you be the very first in line for cider season." She knew Rainbow couldn't turn down a challenge; she was right. Five hours after the bet was made, Rainbow Dash came across something...odd. What is it? What will she do with it?

(An idea using the Shinespark ability in the Metroid series, hence the "Crossover" tag)
[Finished, though I may continue this with a sequel.]