Pokémon
An episode of the anime called "Dennō Senshi Porygon" ("Electric Soldier Porygon" translated in English) was first shown in Japan on December 16, 1997. One part of the episode showed quick flashing red and blue lights. This caused 685 Japanese children to have epileptic seizures. Because of this, the anime went on a four-month break, and several laws were put in place regarding the flashing lights. Also, the previous episodes released had been toned down when Pokemon aired again.