In an interview in 2003, Marc proposed to Yoshito that Shin-chan visits Spain in the anime. The mangaka agreed to it, and in May 2004 the episode 501-3 (オ ー ラッ! スペイン旅行だゾ) aired. He later appeared as a character in the episode 816 (スペインでお宝ゲットだゾ), when Shinnosuke visits Spain again.