Chapter four: Cutie Mark Crusader Sleepover:

“Well this sure is borin’, ah wonder what we can do while in bed?”

The a in "ah" should be capitalized.

“Ah think ah just wet the bed.”

The a in "ah" should be capitalized.

Explode in my, Scoots, it’s tasty!

There is a word missing between "my" and "Scoots."

“I don’t know, I kinda liked the pony part of the story!” Westley Crusher said.

I am sure you probably know this already, but it is "Wesley."

Funny. However, not your best work. This is one of those times when too many cooks spoil the broth.

This is the best fan fiction in existence.