Despite its success, some channels moved the series to night programming or dropped it completely after complaints by parents associations who claimed it was not appropriate for children. Yoshito Usui visited Barcelona in 2004 in order to promote the Spanish release of the manga, when the anime series was already airing on Catalonia's public television channel TV3. Usui was so impressed by "Crayon Shin-chan"'s popularity he decided to thank his Spanish followers by making an episode that takes place in Barcelona.