I am looking for an animated movie about a boy who dreams up this world or he may actually visit it. But I remember a fight scene on possibly a train, with the main bird hero and the main bird anti-hero. The hero was possibly a rooster or an eagle and the anti hero was possibly an Owl. I have fragmented memories about this movie from my childhood and can never seem to find it.

Rock-A-Doodle

Thank you very much, that has been driving me crazy

You're very welcome.