Geiger Rock

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Geiger Rock (ガイガーロック) is one of the Rock People from Cronos, in the service of the Gyandlar and second-in-command to Devil Rock.

He is 2 metres tall, weighs 1.15 tons and has a hardness of 10, being made up of radioactive space rock. Geiger Rock is a tactical genius, but his ultimate plan is to overthrow Devil Rock and become leader of the Gyandlar Rocks. He is an expert inventor, devious spy and can drill himself down into the ground, while he can also emit lethal pulses of radiation from his body itself or via his Atomic Death Fork.

One Geiger Rock was Gelvar.

Fiction[edit | edit source]

The cartoon featured multiple versions of Geiger Rock; for the sake of convenience all are listed here

Machine Robo: Revenge of Cronos cartoon[edit | edit source]

Voice actor: Takurō Kitagawa (Gelvar), Katsumi Suzuki, Hideyuki Umezu

The Geiger Rock Gelvar was part of the group that were working with Clay for the Gyandlar in attacking Korora. However, when he tried to fire on Leina Stol his shot was blocked by a repentant Clay, allowing Rom Stol time to call up Kenryū and battle Gelvar. The Gyandlar Rock's radiation powers kept the fight equal until Clay told Leina how to pool her energy with that of her brother, who was then able to switch to Baikanfu and destroy Gelvar. The Man from Gyandlar The Gyandlar had many other Geiger Rocks in their service, and they were among the troops involved in the operation to gain control of Cleo City. The Heart of a Protecting Angel Another was among Diondra's troops when she captured and threatened Java's villagers. Rockgiran versus Rockdon Along with Devil Rock and Double Rock he attacked Kendō Robo and Heli Transer when they left Emerald City to find more ammunition for the defenders, only to be undone by the unlikely figure of Triple Jim. Gather All Machine Robo He was later part of Garudi's force taken to Devil's Mountain to try and stop a Machine Robo convoy from delivering Metal Laster to Leina and the children of Emerald City; they were driven off by Mask Rock. Knight of the Devil's Mountain, Mask Rock Geiger Rock was part of the team that sneaked into Emerald City onboard Tough Trailer with Garudi to try and destroy the city's computer core; he was defeated by Tough Trailer and Rod Drill. 10 Seconds Before the Explosion! Run, Tough Trailer! Geiger Rock was later sent to harass Leina, Rod, Tough Trailer and Pro Truck Racer when they became trapped behind Gyandlar lines. Fire! Big Blazer Cannon! He was later taken by Garudi to assault the Battle Base after Diondra led a diversionary raid to draw Rom away. Close Call, Land Commander 5!

Toys[edit | edit source]


Machine Robo: Revenge of Cronos[edit | edit source]

Rock Robo[edit | edit source]

  • Geiger Rock (1986)
    • ID number: MRGR-2
    • Accessories: Atomic Death Fork
Geiger Rock was one of the Rock Robo in the Machine Robo: Revenge of Cronos toyline, and coverts from robot to space rock in 4 steps. Geiger Rock has movement at the shoulders, elbows, hips and knees but sadly his arms can only move out parallel to his body, which means he can't raise his weapon.
  • The same figure was issued as Tombstone in Rock Lords by Tonka, with a modified colour scheme - the Japanese version has red robot mode parts. It is unclear which version of the figure was released first.

Notes[edit | edit source]

  • Geiger Rock's name appears to be a double pun, referring to both his radiation-based abilities and his head's resemblance to H.R. Giger's designs for the Alien franchise.
  • The character makes weirdly few appearances in the cartoon compared to Devil Rock and Double Rock - if there are two Gyandlar Rocks required for a scene rather than 3, Geiger Rock is always the one that's missing.