Talk:Princess Luna/@comment-24908786-20140603165042/@comment-24908786-20140605192822

Mind you, it's just speculation I read on Celestia and Luna's descriptions on Wikipedia for the list of charaters from the show.

Since we know Cadance and Twilight became Alicorns due to an action they performed that was worthy of the ascension to Princess-hood, and we don't know the sources of Celestia and Luna's origins, it only makes sense that being born as Alicorns makes your magic stronger than that of those who evolve into Alicorns, and hence why Celestia and Luna have their manes and tails sparkle and flow the way they do: They're pure-blood Alicorns.

Once they gave their magic to Twilight, their manes and tails stopped flowing and sparkling, and only started doing it again the instant their magic returned to them with Lord Tirek's defeat and re-imprisonment.

Heck, remember when Celestia is bested by Chrysalis and knocked out by Nightmare Moon? Her mane and tail stopped flowing and sparkling in both cases, and only resumed doing it again once she recovered from both attacks, including while she was trapped in the cocoon by the Changelings following Chrysalis beating her.