A feature-length English-dubbed version comprising several episodes edited together into a movie, titled Robby the Rascal, was produced by Jim Terry's (Force Five) Kidpix Productions and released on home video in the United States in 1985.

(The same American distributors had previously adapted the same animation studio's 1979–1980 TV series Manga Sarutobi Sasuke, which used much of the same production team, into a similar feature-length work titled Ninja the Wonder Boy.)

However, the English version deleted much of the risque humor that, while not uncommon in children's animation in Japan, would be considered unacceptable by American standards, with the policewoman Sachiko (Sgt.

For example, in one story arc, Horace uses an illusion-causing ray gun to spoil Robby and Tiffany's spring picnic and then manages to capture the little robot and force him to compete in a high-stakes game of tennis.

And in the final story arc, Horace and his minions compete against Robby and Tiffany in a global race in which the first prize is $10 million, which Dr. Deco hopes to use to start an amusement park.