>>56847679The game files with the room. Even excluding this point, the protagonists we play are nothing more than alternative versions of the Diamond and Pearl characters. But that's not a problem at all, because they're standard elements in every timeline, which means that Hisui is the past of every one of his games, even if the adventure takes place in an alternative timeline.
In several languages, we're told that it comes from our past/future, and I play in French and can confirm this. As far as Japanese is concerned, there's the whole context that stipulates and implies that it comes from our chronology, and the part that evokes other chronologies in its context can mean other axes of time, other moments in time, other eras. It's all a blur. Knowing that all other official media refer to the future and the past in relation to the present.
But whether it's taken from an alternative chronology or not, is of NO importance. As I said, this isn't like Mega Evolution and Ultra Beast, which place clear limitations on their presence or non-presence, as well as what they are.
It's not for nothing that Pokemon like Foongus have been given a description to prevent any inconsistency with Brute-Bonnet.
The truth is, it's just that alternative chronologies are standardized. Unless you're told it's exclusive to a particular timeline.
Xerneas doesn't appear in Y, I don't even think he's mentioned. Yet this Pokemon has a role in the history of Kalos and exists. It's bad enough that each version has its own timeline, but their contents all exist.