Heavy Iron

Heavy Iron is a Cardbot and a former major antagonist in Metal Cardbot. He is a notorious outlaw in the universe with incredible strength and destructive power that overwhelms all Metal Cardbots. He plotted to conquer Earth and terraform it to his homeworld Machina using the Star Crown he stole from Black Hook until he was defeated and entrusted Jun Grant the Cardbots' future.

In the third season Metal Cardbot W, Heavy Iron was reformatted by the Beast Virus into Heavy Iron W (헤비아이언W, Hebi Aieon Waildeu), becoming a Wild Cardbot carrier.