>>52476484Why would they need to ensure anything? The book, to them, is set in stone and is basically the bible, there's no need for them to give up their Korai/Miraidon, especially since they couldn't get another at will.
This is so far removed from what the professor actually wanted and tried to achieve and has zero basis in the actual game, you're actually just writing fanfiction to cover up the numerous time travel plotholes.