 Complete the following phrase:  Pokémon has had several anime episodes removed from the rotation in Japan or the rest of the world. The most infamous of these episodes was . The episode made headlines worldwide when it caused 685 children to experience seizures and seizure-like symptoms caused by a repetitive flash of light. Although the offending sequence was caused by Pikachus actions, the episodes featured Pokémon, Porygon, has rarely been seen in future episodes, with appearances limited to one brief cameo appearance in the movie Pokémon Heroes and in one scene-bumper later in season 1. Its evolutions Porygon2 and Porygon-Z have only appeared in a brief part of the opening sequence of . Several other episodes have been removed from broadcast in Japan due to contemporary disasters that resemble events in the program; the 2004 Chūetsu earthquake, the 2011 Tōhoku earthquake and tsunami, and the 2014 