>>36412751The discrepancies actually helped, since the entire reason the like 20 minute prologue was created was to fill in Mewtwo's backstory since the anime hadn't gotten there yet (though the english theatrical release cut much of it down, it's still translated iirc)
>>36412756Also this, the epilleptic seizures in response to the episode were actually due to Pikachu hitting missiles fired by Team Rocket iirc.
Porygon's not actually banned btw, it just doesn't show up again because the original format of the show was a limited 80 episode series that had to showcase 151 Pokemon. When the series ended it was renewed indefinitely starting with Orange Islands which has no reason to show a Porygon, and from Johto-onward basic Porygon hasn't really been relevant. Porygon2 and PorygonZ have appeared as background characters a few times though.