Monster Legends: Bella Baal (Princess to leonine beast TF)
 

https://www.youtube.com/watch?v=TjRUivwZTt0

I don't know if anyone else here plays Monster Legends, but I just hatched a Legendary monster named Bella Baal, who's a Disney princess that can transform into a beast for her attacks. It's decently animated too, with her body changing bit by bit.