When Doom Master and Despera failed to protect/guard the pyramid in the Isis Dimension that is containing Grimlord's identity in reality, Grimlord (under Oraclon's advice) released the Hydrabot to take care of Ryan. Hydrabot was a powerful and headless mutant with tentacled limbs with one-eyed snake-like heads on the ends and an eye protruding from its neck. It shot fire and fire sparks from the snake heads. After a tough battle, Ryan tricked the Hydrabot back into the cave he emerged from and managed to blow up all of his extra heads/limbs (with a box, presumably filled with explosives), leaving only the seemingly living (and weakened) body to remain. Ryan then put the final blow on Hydrabot by destroying him with the "Laser Saber" command. Hydrabot's explosion seemed to cause the pyramid/dimension to collapse, forcing Ryan to escape the dimension and causing him to lose the information to Grimlord's identity in the process.
- In Uchuu Keiji Shaider, Hydrabot's Japanese equivalent was the ancient form/body of Oraclon's Japanese equivalent.