Some Mazinger Z villains, the Mechanical Beasts, were also ported to this line, though they didn't have the same format as the hero robot, being only 19-21 inches tall and made of soft vinyl.
Originally intended only to be store displays, very few specimens of these evil mecha have survived and have become a coveted (and expensive) collector's item due to their rarity.
It was named Chogokin (超合金, Chōgōkin, Chō: Super, gōkin: alloy) as the fictitious material which first appeared in Go Nagai's Mazinger Z manga and anime.
Focusing mainly on classic mechas, these adult collector oriented toys are made mostly of diecast metal, with plastic parts, usually PVC or ABS.
Promotional images including Boss Robot and Doublas M2 surfaced, but never saw release due to the cancellation of the line (Actually, these two figures finally finished trading and it is currently possible to buy them, although at a rather high price.)
Designed by Taku Sato and Yasushi Nirasawa, these 12 inch models made of ABS and PVC had an exquisite level of detail, inspired in retro-styled, steampunk aesthetics, as if they had been conceived at the beginning of the 20th century, and represent a departure from the more classic representations of the robots.
A line of three 18 cm PVC statuettes of Sayaka Yumi, Jun Hono and Maria Fleed, showing them in their pilot suits.
They have also released resin kits of both Koji Kabuto and Tetsuya Tsurugi who, like the girls, are in their pilot suits.
Because of the demand for merchandising, in 1985 toy manufacturer Play Ful obtained a license from Toei Animation to produce a line, but unlike other franchises (more popular in the U.S.), there were no moulds available to produce the toys, and so Play Ful had to develop their own.
The resulting dolls were made of PVC and very fragile, but held a decent level of resemblance to the original characters, sometimes modifying the colors.
Subsequently, mechanical beasts Belgas V5, Brutus M3, Grengus C3 and Gelbros J3 were added to the line.