I'll ask a question
What legendaries, if any, would you like to remove/add backstory to in order to not be overwhelmed or have bland descriptions?
Personally for me, I would be more descriptive about the purpose of Lugia besides the sea guardian. After all, Ho-oh got the burned tower, but Lugia just gets the birds. As for removal, I would like to see all of the lake beings in just one pokemon. One egg can stay one egg.