U.N. Owen
In Brightest Day, In Blackest Night ...
Porygon hasn't had an in anime appearance besides it's one appearance in the banned episode, which was more or less retconned from cannon - whether it exists in the anime still hasn't been confirmed.
Either way, in a program dominantly about friendship, AI and advanced robotics is misplaced.
Um, no it isn't retconned. It cameoed in movies.
So what if the series is about friendship. It is also an action show. You can have zanny sci-fi adventures because of the adventure nature. "Misplaced" is obviously too strong to use because the anime has had both the zanny sci-fi as I listed and the lack of technology. Even then, Clemont still makes inventions still more insane than the "close to real life" mentality you tend to push on.