User blog comment:Kogath/Monster Hunter Spirits Discussion/@comment-184612-20150522042351/@comment-4370375-20150522160552

Going by the life cycle* path, I'm assuming the Rathalos in Stories is a Preadult.

*The proper term for this as real life evolution happens to a population/species rather than to individuals. Pokemon is largely to blame for this misconception to do using the term "evolution" when the correct term would be "metamorphosis".