Flicka indeed has roots in a real story. The plot and characters are developed around real elements, giving it an authentic touch. However, some artistic liberties might have been taken for entertainment purposes.
As I said before, without knowing exactly which 'flicka real story' it is, it's difficult to say. But if it's the horse - related story, the main characters would likely be Flicka the horse and the person who has a relationship with the horse, like a young girl or boy.
No, Flicka is not based on a true story. It's a story that was made up by the author or creators to bring a particular tale to life. Although it may have some common elements or emotions that people can relate to from real experiences, it's not directly rooted in reality.
I'm not entirely sure which 'flicka real story' you specifically mean. There could be many stories related to something named Flicka. It could be a personal account, a book, or a movie adaptation. More context would be helpful.