>>40979316It's just multiverse shenanigans.
Before SM I saw the pokemon world split in 3.
>Classic>Modern>MegaAfter the whole multiverse reveal and the further proof with Let's Go throwing away any sort of continuity I can safely say timelines don't matter anymore.
Also following SwSh leaks it seems like they only focus within their own region. With Dyna/Giga being something Eternatus related.