Sequel to Through The Crack - The middle Gate has opened, but is Equestria ready for what it brings?

It's the thousandth Summer Sun Celebration, and Twilight must travel to Ponyville to oversee the preperations. Once there, she meets five ponies whose destinies are inexplicably tied with her own.

After the events of Sonic Generations, Sonic and Tails end up in the MLP universe and cause havoc.