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ZW08-Grachiosaurus 8.jpg
Brachiosaurus Type
Team Supreme
Crew 1
Weight 134 tons
Depth 15.8 m
Height 10.4 m
Maximum Speed 181 km/h
Weapons Hammer Bone (2)
Spinus Bone
Equipment Outrigger
Radiator Fin
IQ 95

The Grachiosaurus (グラキオサウルス, Gurakiosaurusu) is a Brachiosaurus-Type Zoid, one of over 200 species of biomechanical lifeforms depicted by TOMY's Zoids model, toy, and media franchise.


The Grachiosaurus is a very large Zoid with an open-air cockpit. Compared to other Zoids in the Zoids: Wild series, it is an XL-sized Zoid.

Equipment & Features[]

Spinus Bone
Spinus Bone (スピナスボーン)
Hammer Bone
Hammer Bone (ハンマーボーン)
Outrigger (アウトリガー)
Radiator Fin
Radiator Fin (放熱フィン)
Tail (尻尾)


Zoids: Wild[]

In Zoids: Wild the Grachiosaurus is known as Grax.

Two Grax are seen in the first episodes of Zoids: Wild. One is piloted by Arashi's father, the other by Tremor. It is mentioned that Tremor has never met another Grax rider before. The Grax's Wild Blast is the feature of episode 6.

Tremor's Grax is present in episode 20 where it's firepower is used as strategic weapon against Gigaboss, albeit one that ultimately proves ineffective.

Tremor again appears in episode 37. The Grax is used to save Team Freedom from the Four Dark Warriors. However, after the Zoid is hit by Haxile's Dimepulsar, it goes rogue and joins Dark Metal.

Grax would appear once more in episode 45. Arashi initially suspects that it's Tremor's Zoid being used to fight his allies. However, this turns out not to be the case. It's actually his father's Zoid.

In the same episode Numb-Lock arrives using Tremor's Zoid. The two Grax fight each other. One using a Dark Blast the other a Wild Blast. The power of the battle causes nearby volcanos to erupt, and both Zoids disengage from the fight.

Zoids: Wild ZERO[]

Several Grachiosaurus are seen being used by the forces of the Republic.

In episode 38, a wild Grachiosaurus is seen fighting a Death Rex.