The Mysterious Mare Do Well is the eighth episode of the second season of My Little Pony Friendship is Magic and the thirty-fourth episode overall. The episode involves Rainbow Dash's rise to hero status through various cliché superhero rescues. Later on however, a mysterious mare called by the ponyfolk as Mare Do Well quickly takes her place as the new hero of Ponyville. The Verizon FiOS synopsis for this episode refers to Rainbow Dash using masculine pronouns. "Mare Do Well" is a play on the term "ne'er-do-well," a person who is completely lacking in merit.