I really don't care how you use it, I don't own the rights to My little Pony anyway, so if you tend to use it in a commercial way you won't get a problem with me, but maybe with Hasbro. But that's not my problem.
So, feel free to use all the way you want, it would be nice if you would link back to the base if you use it, but that's optional.
Added Bases for Foals! Enjoy