This is the highly controversial banned episode entitled Cyber Soldier Porygon. The scene where red and...
This is the highly controversial banned episode entitled Cyber Soldier Porygon. The scene where red and blue lights flash up for a few seconds would be what got it banned. A small percentage of people experienced headaches and nausea. Ever since this incident, Porygon has never been featured in any future episode release.
Just as a warning, the scene occurs at 17:23.
Ash and his friends travel to Matcha City and find at the local Pokémon Center that there is something wrong with the Poké Ball transmitting device. To find out what's wrong, they must go inside the machine, where they meet a strange Pokémon named Porygon, who is the key to get Team Rocket (and themselves) out of the cyberspace.