Rainbow Dash has a freak accident while performing a Sonic Rainboom, and awakens to find herself in a strange new world, with strange new abilities.

Avengers and My Little Pony crossover.

Image Credit goes to Alienfirst : Link

Reading an epic tale of one of the Third Hokage's missions, a 6 year old Naruto sets himself on getting some awesome summons of his own. Unable to find a contract on short notice, and not understanding why a contract is required, he goes through the necessary motions anyways and winds up in Equestria. Can Naruto convince the locals to let him be their summoner? Is the ninja world ready for the likes of Pinky Pie? Just how much will a young Naruto benefit from the Magic of Friendship?