Yeah, and its also the reason that Porygon and its evolutions haven't been seen since (except for a couple of very brief cameos where they aren't even mentioned). In fact, Porygon2 and Porygon-Z are the only pre-Gen V pokemon not to have made appearances in the anime. Though why they kept giving Porygon evolutions if they weren't going to put them in the anime because of an incident that happened over a decade ago is beyond me (though I actually like the evolutions in-game),