Talk:Princess Celestia/@comment-3410511-20140623033125/@comment-24908786-20140623215131

I think she had her multicolored mane and tail even before she got her Cutie Mark. After all, I have to guess that her and Luna's manes and tails looked the same as how they did after they transferred their magic to Twilight when they were still blank flanks before taking on responsibility of the Sun and Moon from Star Swirl and the Unicorns.

When they were re-energized by the energy from the Sun and Moon, and gained their Cutie Marks, that is when their manes and tails started to sparkle and flow for the first time, and stayed that way ever since.

The only way to revert the sparkle and flowing motion is if they lose their magic and Cutie Marks, or in Celestia's case in a couple of examples, be severely weakened or knocked unconscious.