>>27369335if Ash were introduced as a manga dex holder with the title of The Synchronizer no one would have batted an eye at Ash-Greninja. Yellow (and maybe Black? not sure if that's just visual shorthand like Amadeus Cho or actually how his perception power works) is the only other one with blatantly supernatural powers and they've both got the funny zigzags on their face
Blue would probably hate Gary's guts. Red's jaded enough at this point that he'd probably hate Ash too, and definitely give him some shit for letting Giovanni and Team Rocket run completely unchecked. Fuck, depending on which incarnation Red met Ash wouldn't even know who Giovanni is.