Monster: "I killed you once, and I'll kill you again."
The Guyver: "You can't kill me. I've been rejected by death."
The Guyver fights Chronos, an evil corporation (run by Dr. Hill from Re-Animator!) that's experimenting with alien DNA/technology, mutating humans into giant monsters which The Guyver has to fight. It's like a strange episode of Power Rangers.
And, uh, Mark Hamill turns into a giant cockroach.
Very campy and very rubbery, The Guyver is a schizophrenic movie; the filmmakers seemingly can't decide if they are making a film for kids or adults. It's cartoonish and horrifying at the same time. The film has some entertainment value, the special effects are good and we get a Re-Animator reunion with David Gale & Jeffrey Combs (the film is produced by Brian Yuzna,) but oh man... it's such a mess in terms of story and tone. There is a rapping alien in this film! Ugh.
And then there is the sequel, Guyver 2: Dark Hero, which is actually a huge improvement over the first Guyver; this one is much more violent and takes itself much more seriously than the first film. And David "Solid Snake" Hayter plays The Guyver in this one! It's not flawless though.. the acting is so-so and the film is is too long (127 minutes!) The budget for Guyver 2 was very low, much smaller than the first film's, and it actually feels less like a movie and more like the first two episodes of a Canadian sci-fi TV series that someone has edited together. Man, I would have watched the shit out of a Guyver series! And what a shame they never got to make a third film. I found Guyver 2: Dark Hero with it's anime superhero quite appealing...