He is sometimes called Herr Fiend and his name is sometimes rendered Dr. Go.
Challenge of the GoBots cartoon
After the end of the Cataclysm, "Doctor Go" confirmed that Gobotron was safe.
In discussing his various powers and enhancements, Cy-Kill mentioned some of them came from Doctor Go. He believed several forms of Cybertronian technology might be useful to the Renegades, once Doctor Go had given them the proper GoBeing improvements. Cy-Kill also commended Go for serving capably as the Renegade's medical officer without being so cliché as to convert into an ambulance. Have a little panache, for Gobotron's sake!
The Master Renegade briefly led a revolt among the Renegades by providing four of them with Power Suits of their own, and the combined Power Warrior, Grungy. After the Master Renegade abandoned his allies with the Power Ship, however, Spoiler provided Doctor Go with the ship's specs, giving Cy-Kill the hope of recreating his own Power Warrior.
Following an off-hand remark by Crasher, Cy-Kill commissioned Doctor Go to create the RoGuns, sentient robot weapons to increase the Renegades' firepower. Unfortunately, Rifle, Pistol, and Squirt were intelligent enough to choose NOT to serve the Renegades, and soon fell in with the Guardians instead.
Doctor Go was able to modify Rogue Star to make its primary particle beam cannons into the largest Astro-Beam ever conceived. This allowed Cy-Kill to temporarily relocate the Communication Moon of GoBotron for his own purposes.
When Cy-Kill challenged the Guardians to a basketball game with the fate of the Earth in the balance, Doctor Go created a telepathic chip using Naismith radiation that would allow Cy-Kill to control the movement of the ball in flight. The Renegades were cheating their way to a merry victory when the Guardians caught on. Spy-Eye and Wrong Way cornered Go on the Thruster and learned how to disable the chip.
After returning home from Axiom Nexus, Cy-Kill nevertheless missed the attention and recruitment possibilities provided to him by the TransTech transmissions. Therefore, he ordered Doctor Go to construct the means for him to remotely hack into the TransTech broadcasts from Level 1, continuing to transmit his words to Axiom Nexus when he found the time.
A perfectionist at heart, Doctor Go tinkered extensively with the Grungy Power Warrior designs as he tried reverse-engineering the Master Renegade's work. Cy-Kill eventually forced him to stop dithering and finalize the designs for Project: Nemesis. Tic Tac completed their work on Nemesis, a Power Tank synched to Cy-Kill's brain waves, allowing him to control the Nemesis Power Warrior mentally once it was formed by the Power Suits.Finally, Doctor Go and
"Brain Problem Situation"
When the Renegades tricked the Guardians into leaving Earth and then shielded the planet beneath an Embargo Field, Crain Brain and Dr. Go watched over the field's projector in the Eiffel Tower. They were ultimately defeated by Tri-Trak, Nick Burns, and the dimension-hopping Spy Changers Wheeljack and Trailbreaker.
"Echoes and Fragments"
Sideways and Gong began playing around with universal constants, mixing events from a reality of GoBots with those of a reality of Transformers. Dr. Go and the Renegades found themselves on Earth attacking Autobot City. Go directed the Dread Launchers to prevent Blaster from signaling for reinforcements from Moonbase One. Later, after the Renegades lost and fled aboard Astrotrain, Dr. Go challenged Zero, Puzzler, and the others for leadership of the Renegades and Decepticons after Megatron...departed.
- Herr Fiend (Super GoBots, 1984)
- Enemy Robot Sports Car
- ID number: 027
- A repackaged release from the Machine Robo Scale Robo DX line, Herr Fiend converts from robot to Porsche 928S.
- In the Challenge of the GoBots cartoon, Doctor Go was repeatedly depicted as unusually short for a Renegade, often times roughly half the size of Cy-Kill and others. This was a recurring error for the other Super GoBots Professor Von Joy and Zeemon as well.
- Doctor Go's Cybertronian-style body from the "Cataclysm universe" is modeled on Blowout from the Generation 2 toyline.