After each of the 'Mane 6' are teleported to an unknown dimension via a dimensional rift, the meet a young man, named Will, who-after acquiring amnesia-will do all it takes to help them get back to their home. Though, there is more than meets the eye about this 'brave hero'.
Same story from 'Fanfiction.Net, just slightly edited. For both 'Grammar Nazi's' and comedy alike.