Twilight Sparkle, a lavender unicorn who specializes in magic, casts a spell. This "number 47" is a shrinking spell. Unfortunately, this causes some big trouble for her once Ponyville's residents shrink to the size of small toys. Do ponies enjoy being little?
Answer: No.

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Well, my last one-shot was a success. Let's hope this one produces the same positive result.
Also, the image was the best one I could find. The Mane 6 and Ponyville are NOT turned into fillies.
The timeline is also just after Magic Duel, and the ponies' scale when they're small are that of the MLP:FiM toys here on Earth.