Which Pokémon and it's evolutions were banned from appearing in a main role after the Episode 38 Incident?

The Porygon Line, consisting of Porygon, Porygon2, and Porygon-Z, was banned from appearing in a main role after the incident in the 38th episode. This incident involved a sequence of flashing lights and colors that caused a significant number of viewers to experience seizures or other adverse health effects. Due to this unfortunate event, as a precautionary measure, the Pokémon anime producers decided to halt the prominent use of the Porygon Line in future episodes to prevent any potential harm to viewers.