When a portal is opened between Equestria and Earth, everything goes almost perfectly and the friendship is instant, even if the spatial instabilities prevent the portal from being kept opened for extended periods of time.

Although it’s not possible for people and ponies to readily move through the portal, that same restriction does not apply to data, and the data that travels the most quickly are stories about the multitude of crises that have confronted each world, and the heroes that have stopped those crises time and time again, two of them always coming to the forefront of debates: Equestria’s Rainbow Dash, and Earth’s Sonic the Hedgehog. And always, there is one question that has gone unanswered. A question that will be settled once and for all in the Equestria Grand Prix:

Who is really “the fastest thing alive”?