Secret Valley of the Fossil Men

From GoBots Wiki
Jump to navigationJump to search
Machine Robo: Revenge of Cronos ep 40
"Secret Valley of the Fossil Men"
("hihou no tani no kaseki choujin")
Production company Ashi Productions
Airdate 9 April, 1987
Written by Rumiko Asao
Shunsaku Ban
Directed by Naoyoshi Kusaka

The quest for the Wolf Sword steps up.

Celebration time!
Official release coming!

This Machine Robo: Revenge of Cronos section
is based on older sources and requires cleanup.
You can help GoBots Wiki by correcting it.



Rom, Rod Drill, Pro Truck Racer, Heli Transer and Magna Rock are investigating an old temple that has been heavily damaged by avalanches. Magna Rock uses his phasing abilities to go on alone, and inside he finds the fourth element of the Hyribead - the other Wolf Sword. He takes it outside to Rom but Garudi is waiting for them with Baldas, Zarios and Falgos; Baikanfu holds the Gyandlar off and orders the others to take the sword back to the Battle Base. After defeating Devil Satan 6, Baikanfu duels with Garudi before the ground collapses and the pair fall down into the earth. Diondra coolly orders that the pair are left while they follow the newly-discovered sword. All of this is observed by a transforming head being carried around by a pterodactyl. Drill's party take refuge in a forest but are attacked by tentacled plant life, with the Varigale-X hovering overhead searching for them.


They decide they have to fight back against the tentacles, drawing Diondra's attention; she takes the sword from Magna Rock and begins bombing the group before escaping in the Varigale-X. Below, Baikanfu switches back to Rom but Garudi finds his Wolf Sword first and manages to get out, leaving Rom to his fate. Drill's team come across the head from earlier being chased by the Devil Satan 6 and decide to help, aided by Falcon Robo and an army of Jet Tribe troops who have set out to look for them. They attack the Varigale-X but Diondra is able to get away and deliver the sword to Gadess. Rom is saved by more strangers - who introduce themselves as the Fossil Men. Back at the Gyandlar mother-ship Grujios realises the sword Diondra captured is a fake; the real thing is embedded in the combined form of the Fossil Men, Gattai Saurer, who pledge to aid Rom. However Rom's own sword is still in the hands of the enemy; Garudi's success enrages Diondra, who plans to send her secret weapon Phenomena into battle.

Featured characters[edit]

(Numbers indicate order of appearance.)

Machine Robo Gyandlar


  • This is the first appearance of the Fossil Men - Header, Abarar, Leggar and Taildar, and their combined form Gattai Saurer.
  • Leina is officially made head of the medical facilities onboard the Battle Base.
  • Magna Rock can phase through things and has a forcefield.

Home video releases[edit]

Laser Disc

1992Machine Robo: Revenge of Cronos Box (Toshiba EMI)


2001Machine Robo: Revenge of Cronos DVD-Box 2 (Pioneer)


2022Machine Robo: Revenge of Cronos (Discotek Media, USA)