The Guyver, also known as Mutronics, is a 1991 science fiction film based on the Guyver manga series.
A college student named Sean Barker discovers that his girlfriend Mizky Segawa's father Dr. Tetsu Segawa, a researcher for the mysterious Chronos Corporation, has stolen an alien device known as "The Guyver," from Chronos, which fuses with him and causes him to be covered in a suit of bio-armor. The president of Chronos, Fulton Balcus, wants the Guyver back and sends his mutant henchmen, the Zoanoids, led by Lisker, to steal it back. They kidnap Mizky and take her back to Chronos, and Sean is seemingly killed when Lisker pulls the control medallion from his forehead, causing him to melt into a puddle of green slime and die. But the Guyver rebuilds Sean's body from a cellular level and resurrects him to save Mizky and kill the evil Zoanoids before finally facing Balcus himself, who transforms into a giant dinosaur-like monster (dubbed the Zoalord) to fight Sean.
The movie came under heavy criticism from critics and fans alike[citation needed], but remains noticeable for Hamill's performance.[citation needed] The film generated enough interest for a sequel, Guyver: Dark Hero, with Armstrong replaced by David Hayter in the role of Sean. This sequel found more praise among fans and is considered a better representation[citation needed] of The Guyver mythology.