So around 600 Japanese kids had seizures as a result of Pokemon.
So while Lavender Town Syndrome might have been a hoax, the children who had seizures weren't a hoax.
https://www.lifewire.com/lavender-town-syndrome-1126184"In 1997, an anime based on the franchise made headlines worldwide when flashing images from the episode “Dennō Senshi Porygon” (“Computer Soldier Porygon”) induced seizures in over 600 Japanese children. Although most of the kids were fine, two had to be hospitalized for an extended period of time, and the Pokémon anime was pulled off the air for a few months."
