SonDash

SonDash is the het ship between Sonic and Rainbow Dash from the Sonic the Hedgehog and My Little Pony fandoms.

Canon
As they are from different franchises, they have never met.

Despite this Sonic and Rainbow Dash do have a few things in commonly that would help them to get along. Like their super speed abilities and with their names having something to do with it. The two take great pride in their speed and that has made them rather arrogant and competitive, but the loyalty they have for their friends helps to not get consumed by it.

Similarities

 * Both of their skins share a blue color scheme.

Fanon
SonDash is considered to be one of the most popular ships in the Sonic/My Little Pony crossover fandom. Since Sonic and Rainbow Dash's similar traits, like their need for speed and blue being their main color inspires fans to ship them.

Sonic-Rainboom is a fanclub dedicated to Sonic/MLP crossover-related media, including ships like this one. Fan art featuring their alternative forms in Sonic Boom and Equestria Girls are also popular, as they depict Rainbow Dash as one of the animal-like creatures who reside in Sonic's world, place a pony or pony Sonic in one of the two MLP universes or keep Sonic as his hedgehog self beside EG Rainbow Dash. Since Sonic has been paired up with humans before and there have even been fans of the ship who have the two as animal-human hybrid versions of themselves.

There has also been fan art of Rainbow Dash with Werehog Sonic, which might be a nod to the time when one of her friends was turned into a vampire-like pony and werewolves are also classic monsters. While the two being proud for their speed has fans drawing them racing one another to see which one of them is quicker, along with having Sonic and Rainbow Dash playing rock music together as a guitar duet. Since the two have used music to save people with their friends.

SonDash has also got fans to ship Tails with either Fluttershy or Scootaloo, since Fluttershy has the ability to fly and some see Scootaloo as Rainbow Dash's Tails. Due to some comic-con fan art having the two as Sonic and Tails.

Fandom
DEVIATART

WIKIS
 * on the