The Guyver (released in Europe and South America as Mutronics) is a 1991 science fiction tokusatsu superhero film directed by Screaming Mad George and Steve Wang, and produced by Brian Yuzna.

Barker learns that a major corporation known as Chronos is after the Guyver unit, and soon discovers that the company seeks to genetically engineer monsters.

He returns the metal briefcase to Chronos' president, Fulton Balcus, only to discover that it contains an old toaster, Segawa having hid the unit in a pile of trash before he was caught.

At a dojo, Max Reed, a CIA agent, notifies Dr. Segawa's daughter, Mizuki, about the incident, while her boyfriend, Sean Barker, struggles to pay attention in class.

The Zoanoids gang up on him, and Lisker rips the Control Metal off his forehead, disintegrating the armor into liquid, and killing Sean in the process.

Before the trio proceed to escape, Reed suddenly mutates into a cockroach-esque Zoanoid, but dies due to his system rejecting the new form.

[2] George and Wang completed the movie’s principal photography in five weeks, beginning in October 1990, shooting on locations in Simi Valley and Los Angeles.

[1] Glenn Kenny of Entertainment Weekly said the film features “surprisingly convincing costumes and effects, inspired casting, and energetic direction, [but] what sinks it is its unfortunate adherence to the time-honored direct-to-video clichés: an unearned paycheck for a onetime A-picture star, and a tendency to fall back on lame humor whenever the going gets slow.”[4] David Johnson of DVD Verdict criticized the film's "ham-fisted over-acting", "ludicrous plot contrivances", and "nauseatingly hokey soundtrack.

"[5] Nathan Shumate of Cold Fusion Video Reviews criticized the film, in particular “the annoying demeanor and lack of personality” of lead actor Jack Armstrong, adding: "If there ever was a movie made for fan appreciation only, this is it, [...] but not everything can be blamed on audience unfamiliarity; there are plenty of elements in this movie that don’t work even by fanboy standards.”[6] The film generated enough interest for a sequel, Guyver: Dark Hero.