I think they cut out "Beauty and the Beach" for a scene with James of Team Rocket in a ladies swimsuit. Fanservice in a kid's show? How weird!
I saw the Porygon episode and I didn't have a seizure. But some other people did. I hear that's why they say something like this at the beginning of anime aimed at kids/teens nowadays:
"Keep your room brightly lit and don't sit too close to the tv".
(Sometimes ADV and other companies translate these warnings. For example: Kaleido Star and Papuwa)