I have a theory that Bagan is actually an evolved form of Baragon. Think about them in terms of appearance. Both of them have a large horn protruding from their face, they both have very sharp teeth/fangs, and their skin color is similar along with their bumpy back "tiles". Also, the names are pretty similar...

Baragon/Bagan: All you need to do is switch some letters around and take a few out from Baragon and you got yourself Bagan!

(This is kinda a joke blog, don't take it too serious, okay?)

Bagan 8 - Baragon 2001