Update: Added more "gravity" effects when Pinkie lands.
Took the Pinkie Pie from here: [link]
, the animation from here: [link]
and combined them together.
If anyone want the source file (.fla, Flash CS3 or higher) you can get it here: [link]
(I'm not 100% satisfied with the animation. If someone can improve it, feel free to modify the .fla and post a link in the comments)
Used in my new game: [link]