The Kamen Rider character--a grasshopper-based superhero with a turbo-charged bike--dates back to the 60s, Kamen Rider ZO was merely the latest incarnation at the time. Feeling more like a half-fleshed out TV pilot than a full-fledged theatrical film (at about 46 minutes, Kamen Rider ZO was released as part of a double feature), this movie was produced partly by toy company Bandai--who I am certain released a line of nifty action figures to tie in.
This adventure finds Rider protecting a young boy from a creature created by the boy's own father. This creature, like the Zeiram character in Keita Amemiya's manga-based film of the same name, is a biological robot that can regenerate itself when injured. The Neo Life-Form, as the monster is called, also has two buddies--a bat monster and a spidery thing. And they're all controlled by a pulsating gooey disk with the little boy's face on it.
The action sequences are brisk, the melodramatic drivel, however, is heavy-handed, which I suppose, is fine for a kid's program. The violence also sees a bit of monster gore, which is just fine by me but seems a little rough for a kid show. Amemiya went on to direct another short movie about the superhero, Kamen Rider J, the year after this one was released.
Review by Scott from Modesto from the Internet Movie Database.