Two of Motoo Abiko's most beloved casts colliding in one movie, each bringing their own flavor of chaos to a problem neither could solve alone. The joke isn't just that they have to work together, it's watching Ninja Hattori's stealth precision get completely steamrolled by Perman's clumsy superpowers in real time. A 1985 crossover built on the simple principle that the best comedy comes from characters who have no business being in the same story trying anyway, with an alien kaiju as an excuse to let both franchises go completely unhinged. The film knows it's a gimmick and leans into that instead of pretending to be something it's not.

Motoo Abiko's Ninja Hattori-kun and Perman share the screen in this 1985 crossover film. An egg from outer space drops out of the sky and turns into a monster intent on destroying the Earth, and the characters from both series end up caught up in the trouble. The movie mixes action, adventure and comedy, and it played in theaters on a double bill with Doraemon: Nobita no Little Star Wars.