Death Egg Robot

The Death Egg Robot, sometimes referred to as the Death Eggrobo for its resemblance to the Eggrobo series, was a large booster for the Egg Mobile, designed to interface with the Death Egg and allow Dr. Ivo "Eggman" Robotnik to control the craft. It was also capable of detaching from the Death Egg and moving around independently, complete with various weapons with which to defend the Death Egg's interior.

Other models
After the original Death Egg Robot's destruction above West Side Island, various other models of the Death Egg Robot were constructed.

Great Death Egg Robot
Called the Great Eggrobo for short, was constructed as a replacement for the original Death Eggrobo in order to harness the power of the Master Emerald. Unlike the original, the Great Eggrobo was also capable of space flight.

Super Death Egg Robot
The Super Eggrobo series was constructed during Eggman's attempt to recover the Second Death Egg from the Moon. Though the initial Super Eggrobo model was destroyed, the Super Eggrobo Z was constructed to replace it, and successfully used to recover the Second Death Egg from the Moon. After the Second Death Egg's destruction, the Hyper Eggrobo was formed through a fusion with G-merl.

Mega Death Egg Robot
The Mega Eggrobo was constructed as part of Eggman's plan to build the Third Death Egg, and was designed to interface with and draw power from the Nega Wisp Armour. However, Eggman's plan to use the Incredible Interstellar Amusement Park as a source of fuel was unsuccessful, and the Mega Eggrobo was defeated at the climax of the Lost Hex Incident.

During the War to Take Back Sonic's World, the Mega Eggrobo and Nega Wisp Armour were rebuilt as part of the Valtron series, using the Phantom Ruby as a power source.

Death Egg Robot Sentinels
A mass-produced line of Death Eggrobos based largely on the original model was also produced before and during the War to act as enforcers throughout the Eggman Empire.