Death Egg Robot

The Death Egg Robot (デスエッグロボ) is a recurring object in the Sonic the Hedgehog series. It is a giant battle robot built by Dr. Eggman in his own image which has been used by the doctor on numerous occasions to battle Sonic the Hedgehog and his allies.

Appearance
The first depiction of the first Death Egg Robot model showed it as a humanoid mech whose head and torso came together in an indistinguishable egg shape. Its head and torso bore a great resemblance to Dr. Eggman during his younger days, right down to his mustache and attire, but with a metallic grey scalp and a small antennas on the sides of its head. It also had yellow shoulders with red arrow marks on them, along with red and yellow arms with three spikes for fingers, a grey jetpack on the back, and thighs made of two grey spheres each. It also had large and armored red feet with kneecaps.

Modern depictions of the first Death Egg Robot model depict it as much taller than initially shown. While still similar to the original, its modern depiction has a sturdier chassis, what that appears to be wheels installed in the feet, round shoulders, and a black and grey jetpack consisting of two rectangular cylinders. The antennas seen on the head of the original are also absent and the forearms appear to have been redesigned to be much bulkier to allow for the rotary spikes on their ends. Its lower chassis is also smaller and its legs are shorter.

The second Death Egg Robot that appeared onboard the E.G.G. Station Zone was similar to the first model, but with a noticeable paint job, such as more black details and Eggman Empire shoulder tattoos, to reflect the modern Eggman design. It also had almost stubby legs.

Abilities and traits
The first Death Egg Robot model was a massive powerhouse but incredibly slow. Its thick chassis made it nearly impervious to attacks (even bombs could only stun it temporarily) and it had enough physical strength to jump despite its massive frame, smash metal like paper, and slam into the ground with enough force to cause significant tremors. With its jetpack, it was capable of flight as well. It could also fire its hands as projectiles and guide them back to its arms to reattach them, and deploy small bombs. Later sources have also shown that the first model possessed an articulated waist that let it rotate its torso 360 degrees and that its arms could launch telescopically over great ranges.

The second Death Egg Robot that appeared onboard the E.G.G. Station Zone had all the original model's abilities and more. In addition to being significantly faster and more durable than the original, this Death Egg Robot could generate an electrical field around itself that made it invulnerable. It could also fire lasers and energy blasts.

Sonic the Hedgehog 2
In Sonic the Hedgehog 2, after being chased deep into his Death Egg by Sonic the Hedgehog after the hedgehog's victory over Mech Sonic, Dr. Robotnik entered his final trump card - the Death Egg Robot - and took his stand against Sonic. After a heated battle, Sonic defeated Eggman and his Death Egg Robot one-on-one, and the Death Egg began to explode.

Sonic the Hedgehog 4: Episode I
In Sonic the Hedgehog 4: Episode I, Dr. Eggman used an updated version of the Death Egg Robot to battle Sonic the Hedgehog after the hero had chased him to his E.G.G. Station. Although this Death Egg Robot proved a more formidable foe than last time, Sonic still managed to defeat Eggman and this mech suit, causing the entire E.G.G. Station to explode.

Sonic Generations
In the console/PC version of Sonic Generations, a younger version of Sonic would up fighting Dr. Robotnik and the Death Egg Robot onboard the Death Egg during the time of the Westside Island incident due to a temporal displacement. History would repeat itself though, with Classic Sonic triumphing over the Death Egg Robot. It was then that the Time Eater showed up and kidnapped Dr. Robotnik from the Death Egg Robot's remains.

Sonic Mania
The Death Egg Robot will reappear in the upcoming Sonic Mania as the boss of Green Hill Zone Act 2. In the game, Dr. Eggman uses it to chase the player across the level. To defeat it, the player must hit it on the head eight times.

Death Egg Robot sentinel
The Death Egg Robot sentinel is a mass-produced version of the Death Egg Robot. Although similar in design, they are far greater in size and possess much more destructive potential. They are scheduled to appear in Sonic Forces.

Sonic the Comic
The Death Egg Robot (referred to only as Robotnik's "deadly battle armour") appeared in a flashback in Sonic the Comic #27, "Part 2: A Tale of Tails". The main events of Sonic the Comic take place after Sonic 2, and in the story in question, the Death Egg Robot is revealed to have played precisely the same role as in the game: Sonic fought Robotnik aboard the Death Egg (with Robotnik in the Death Egg robot) in order to prevent the satellite's operation.

Archie Comics
In the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics, the Death Egg Robot is referred to as the Egg Destroyer Battlesuit. During Operation: Clean Sweep, it was used by Dr. Eggman to battle Sonic. However, it got destroyed once Sonic transformed into Super Sonic.

Following the events of Worlds Collide, the Egg Destroyer Battlesuit's past is now virtually identical to its game counterpart's.

Trivia

 * While not exactly the same machine, Robotnik uses the robotic armor suit to escape at The Doomsday Zone in Sonic & Knuckles. After the player destroys the robot's blue rocket armor, Robotnik manages to yet take flight now with the robotic armor suit, that is heavily similar to Death Egg Robot.
 * The Sonic the Hedgehog 2 version of the Death Egg Robot bears a strong resemblance to the ATM-09-ST Scopedog from the 1983 mecha anime Armored Trooper VOTOMS.
 * In the Adventure Gamebook series which include Where's Sonic?, Adventure Gamebook 1, and Adventure Gamebook 2, the Death Egg Robot is simply referred to as the Battle Suit.
 * The Death Egg Robot makes a cameo in Speed Highway and City Escape from Sonic Generations. It shows up on a poster for "Chao in Space: The Search for Tikal".
 * The Death Egg Robot appears as a boss in the Sonic the Hedgehog Level Pack of LEGO Dimensions. During the boss fight in said game, Sonic comments on how Eggman is using it for the fourth time.