Rainbow Dash is a female pegasus and one of the main characters in My Little Pony Friendship is Magic. She is responsible for maintaining the weather and clearing the skies in Ponyville and represents the element of loyalty.
Mari0[]
In Mari0, while she herself does not appear, her mane and ear is the 33rd hat that the Player can wear. It is called 'Bestpony' in the source code. The player's hat will be set to it after preforming a Sonic Rainboom once the ability to do so is enabled in the Cheats menu.
Additionally, one of the loading texts that may appear under the Stabyourself.net logo when starting the game is "Raising coolness by 20 percent..", in reference to one of her quotes.
Mari0: SE[]
In Mari0: SE, Rainbow Dash is one of the included Custom Characters. On a Twitch stream, Maurice implemented her and the ability to add "flight" (infinite jumps) to a character. MM102 also made a Rainbow Dash character, which was later included in beta 9, although the flight ability was removed from that version.
Order of Twilight[]
In Order of Twilight, she appears in the ending along with the rest of the Mane 6.