The anime contains many of references and parodies from other anime series as well as live-action shows and movies that were popular at the time, e.g., Kiki's Delivery Service, Kamen Rider X, A Taxing Woman, and Sailor Moon (which had started airing a few months afterward, and Usagi Tsukino would be played by the same voice actress as a heroine of this show).

Aside from the anime, two manga series and a PC Engine side-scrolling video game by NEC Home Electronics were made as tie-ins, all of which were also released in 1991.

This version followed an early draft that featured different scenarios and character designs to the ones shown in the anime and served as the basis for the video game.

Agedama Genji is a 4th-grade student from Planet Hero who landed in Morisoba City with his robotic computer friend Wapro for some training during his summer vacation, at his father's request.

After their arrival, he joins East-Morisoba Elementary School, where he meets his shy but studious love interest, Ibuki Heike, and his archenemy, Rei Kuki, an enormously wealthy heiress who arbitrarily rules the city, shares her grandfather Raizo's ambition to conquer the world, and, as a first step, attacks the city with a variety of monsters that she and her grandfather create with the Monster-Cooker (怪獣合成マシン, Kaijuu-gousei-machine), which the rich old man invented.