Forgotten Pokemon Legends

What if in the world of pokemon, there was a legend of a human that once held a place in the hall of origins that just one day vanished. Would a different human ascend that is of the same blood line, or a human that everyone think is lower than common people.

I do not in any way shape or form own pokemon, all rights go towards the creator only. So the pokemon creator, If you ever come across this story, please in the last season of all pokemon seasons add it into the story line.