The Kaiju from the mecha anime, Gordian Warrrior. They are giant robots called Madoputers that are sent by the Madokuta organization. They come in many different forms and Daigo faces each of them off with his three-in-one robot, Gordian.
Hellarigon
Scorpion Arm
Demuga
Bonoradon
Mukadekku
Spider
Saryu
Radogon
Harikon
Kaninka
Deathbird
Bakedargha
Black Dragon
Tarandora
Satan Neiru
Satan Mausa
Devil Sai
Condorius
Satariken
Musharon
Genryun
Sanjushin
Dorigeran
Cobran
Shefura
Unnamed Robot
Kappajin
Bat-Type Fighter
Kamerund
Azara Kaizer
Sajin
Tsuinza
Adidas
Bougan
Unnamed Robot
Kilanzar
Zaikron
Nomzel
Unnamed Robot
Satan Knight
Mukandelar
Anbrelon
Gaendam
Gibara
Chopper Arm-type Mecha
Doudo
Madcraft Snowman
Beargiller
Concordas
Kamala
Sphinxer
Dokuman
Trans System-type Mecha
Trans System-type Mecha
Centipede-type Mecha
