If you need any new features in Essentials to help you create the animations, let me know and I'll try to invent something suitable. I've listed some of them in my To Do list already.
The good thing about animations nowadays is that you can export individual ones to a text file, allowing easy sharing. So long as you include the graphics alongside it, it'll work fine. A new PkmnAnimations.rxdata can be created every so often with all the new animations, but not too frequently.
Be sure to use the latest Essentials!