Friendship is Magic School Bus

When weird things start happening in Ponyville, it's a good guess that the pony behind it is either Pinkie Pie the Reality Warper, Doctor Whooves the Time Lord, or Derpy Hooves the, er... weird one.
Or, you know, it could just be Ms Frizzle, the other reality-warping weirdo Time Lord.

And this is what happens when you watch too much Magic School Bus and MLP:FIM at the same time.
I had way too much fun designing the pony versions of the Magic School Bus cast.
And I really need to get a life.