After returning from an exchange in books down at the Dragon Kingdom, Twilight and Spike (more so, Spike) find a spell that can change a dragon into a pony. Soon it becomes more than Spike had expected.

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Inspired by the Cathy Wesluck, and some brony, at a con. When the brony asked the question "If Spike had the choice to become a pony, would he?" Well, not to the exact word, but yeah. Cathy Wesuck said, "He might want to be pony for a day, to try it out."