Talk:Magical Mystery Cure/@comment-19871-20130929153942

It's clear that Rarity and Rainbow Dash, Flutershy and Pinkie Pie, and Rarity and Appleack and RD and Fluttershy learned what it's like to be and live each other's life so when their cutie marks were switched, their personalities were altered by Starswirl's unfinished spell, this affected their elements as well, that why Pinkie was trying to be serious while Fluttershy was doing her best to be funny, etc.