I've Enjoyed Reading Them (A lot.)

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  My Little Alicorn A magical prank backfires, leaving Celestia stuck as a filly and Luna having to take her place. by InsertAuthorHere 179,845 words · 2,965 · 60
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  Sunny Skies All Day Long Celestia's Day Off by PhantomFox 8,536 words · 9,397 · 145
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  The Sisters Doo Daring pays a visit to her sister in Ponyville. Due to buried grudges, things get out of hoof. by Ponky 115,616 words · 2,154 · 38
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  Anthropology Lyra is determined to find out the truth behind the mysterious legends of humans. by JasonTheHuman 130,415 words · 8,356 · 170