Source: Wikipedia, "[en.wikipedia.org/wiki/Ninja_Hattori-kun_%28video_game%29 Ninja Hattori-kun (video game)]", available under the CC-BY-SA License.
Ninja Hattori-kun (忍者ハットリくん, lit. "Little Ninja Hattori") is a 1986 video game software developed and published by Hudson Soft exclusively in Japan for the Nintendo Family Computer . It is based on Fujiko Fujio A's (pen name of Motoo Abiko) Japanese manga series of the same name, which later became an anime series and Asian franchise. The game was released around the same time the anime was aired. It was the fifth best selling Famicom game released in 1986, selling approximately 1,500,000 copies in its lifetime