Kiteretsu Daihyakka

A young boy named Kiteretsu, known for his scientific talents, has created a robot named Korosuke. Together with his friends and the robot, he uses a time machine to travel through different eras. Miyoko, a girl from his neighborhood, is considered his close companion. Tongari, his rival, exhibits traits similar to another character, Suneo Honekawa. In their community, there is a schoolyard bully named Buta Gorilla, who shares characteristics with Gian, but often targets Korosuke despite being in the same grade.