Sonic News Network

Know something we don't about Sonic? Don't hesitate in signing up today! It's fast, free, and easy, and you will get a wealth of new abilities, and it also hides your IP address from public view. We are in need of content, and everyone has something to contribute!

If you have an account, please log in.


Sonic News Network
Sonic News Network
Not to be confused with the Giant Eggman Robot.

The Giant Eggman Robo[1] (巨大エッグマンロボ[2] Kyodai Egguman Robo?, lit. "Great Eggman Robo") is an object that appears in the Sonic the Hedgehog series. It was a massive, battle mech-like EggRobo.[3] created by Dr. Robotnik. Powered by the Master Emerald, it was used by Robotnik to battle Sonic and Tails aboard his damaged Death Egg during the second part of the Angel Island incident.



The Giant Eggman Robo has been associated with a massive EggRobo model,[3] though it also somewhat resembles the Death Egg Robot.

Powers and abilities

With the Master Emerald serving as its power source, the Giant Eggman Robo is an extremely powerful machine. Its sheer size grants it immense strength, enough to crush a person using only its fingers, and walk through the metallic structures onboard the Death Egg like they were paper. It can also fire fireballs from its nostrils and slide down its torso to reveal a weapon that can fire immense laser beams channeled directly from the Master Emerald.


Sonic & Knuckles

Having beaten the Death Ball onboard the Death Egg, Sonic the Hedgehog and Miles "Tails" Prower chased after Dr. Robotnik when the doctor made his escape. Eventually, the group arrived at the Master Emerald-powered Giant Eggman Robo, which the doctor quickly jumped into though a hatchway that closed behind him. Robotnik subsequently brought his creation into position for a final showdown with Sonic and Tails. After the heroes destroyed the Giant Eggman Robo's hands however, Robotnik resorted to using its alternate weapons while he tried closing in on Sonic and Tails. Despite this, Sonic and Tails succeeded in defeating the Giant Eggman Robo by attacking its Emerald chamber. As the giant mech went down in flames, Robotnik made an escape attempt in his Egg Mobile with the Master Emerald in tow, while the Death Egg fell apart around him.


The Giant Eggman Robo is the second and final boss of Death Egg Zone Act 2 in Sonic & Knuckles and its locked-on form Sonic the Hedgehog 3 & Knuckles. It is the fifteenth boss of Sonic & Knuckles and the twenty-eighth overall boss of Sonic the Hedgehog 3 & Knuckles in Sonic and Tails' playthroughs of said games.

While it can only be fought by Sonic or Tails under normal circumstances, it can be fought by Knuckles if both Level Select and Debug Mode are enabled. It serves as the final boss for Tails, as well as for Sonic if the player did not collect all seven Chaos Emeralds.

Boss guide

Like in the final boss battles in the original Sonic the Hedgehog and Sonic the Hedgehog 2, there are no Rings available during the fight with the Giant Eggman Robo, although any Rings still in hand from the first section of Death Egg Zone Act 2 are carried over to this section.

Phase one

Phase one begins immediately after defeating the Death Ball, with the playable character(s) running off-screen chasing Robotnik. The screen proceeds to fade to black, revealing the scene where Robotnik enters the Giant Eggman Robo after having outrun the playable characters. After that, the ground starts to collapse from the left. To avoid it, the player must forget about the Giant Eggman Robo and run to the stable ground on the right. Once far enough to the right, the Giant Eggman Robo will come back in from the left, filling the screen with its massive size. Here, the real fight begins.

During the first phase, the Giant Eggman Robo attacks with its massive fingers, which the player must destroy while dodging their attacks. These fingers are collected in two groups of three. Each "hand" locks onto the character if they are close enough before rising up and then slamming down into the floor. Unless the character is Spin Dashing, getting caught under the fingers will damage the player. The Giant Eggman Robo will repeat this attack pattern until the phase is over.

Three hits are needed to destroy each of the six fingers. To damage the fingers, the player must execute one of the following moves while the fingers are on the ground:

  • Jump just when the fingers are about to fall and then bounce on top of them while they touch the ground.
  • Keep revving up a Spin Dash and let the fingers destroy themselves when they bring themselves down on the playable character.
  • Release a Spin Dash while standing in-between fingers, and use this to ricochet between two or more of them. If this option is chosen, the player must make sure that the fingers are not up against the screen's walls. If they are, the player's Spin Dash will come to a halt when they reach the leftmost finger. The game will then assume that the playable character has been crushed between it and the wall, and will restart the boss battle.

It is possible to hit two fingers at the same time with one attack (although the positioning must be right) or hit a finger twice with one attack. Additionally, Sonic can hit up to three fingers at once with his Insta-Shield.

Phase two

Second phase of Giant Eggman Robo.

Once all of the fingers have been destroyed, the Giant Eggman Robo drops below the platform. It will then appear from the side at the far left of the screen, marking the start of the second phase. During this phase, the mech walks slowly towards the player. Meanwhile, the player must avoid the flames fired from the Giant Eggman Robo's nose. This attack is lethal right from the moment it leaves the nose, meaning the player has to time attacks very carefully, as the nose is the part that needs to be hit. The flame attack will not hurt the player if they have a Flame Shield.

Hitting the nose will not damage this boss. However, it will cause the mech to open its chest chamber, revealing the Master Emerald inside a laser weapon that begins charging once revealed. The player can score a hit (or two) by hitting the Emerald weapon while it is charging. After the weapon has charged for a few seconds, it will fire a laser across the screen that can only be dodged if the player is at the apex of a jump. It is best to listen to the sound the weapon makes as it charges to help with the timing when dodging this attack. A split-second after the sound ends, the weapon fires. It is also possible to dodge the laser by heading as far to the right as possible and then crouching, although, to pull such an attempt off, the Giant Eggman Robo must be rising up from a step while firing its laser, which is a rare occurrence.

Another good way to avoid contact with the laser beam is to jump over to the left and hit the top of the Emerald weapon right when the laser beam is fired. It is recommended not to try and hit it again right after this, as the Emerald weapon might close on the player and cause them to fall off the bottom of the screen.

To clear this phase, the player must hit the Emerald weapon eight times. After that, the Giant Eggman Robo drops off the screen again, defeated.

Phase three

Final phase of Giant Eggman Robo.

After the end of the second phase, an Egg Mobile piloted by Robotnik (or an Eggrobo if the player is using Knuckles) will rise up from the Giant Eggman Robo's wreck. This Egg Mobile has the Master Emerald on the end of its grabbing device. The vehicle then flies off to the right, and the platform rapidly starts crumbling from the left. Meanwhile, debris falls down from above as the Death Egg falls apart.

All there is to this phase is running to catch up with the Egg Mobile and hitting it. The floor rapidly drops away during this part - nearly as quickly as the player can run. The greatest danger is flying off the end just after the last hit is scored, making for an extremely frustrating death. The player must keep moving to the right, especially after the seventh hit to avoid the pitfall left behind by the falling platform. One should also make sure to time their Spin Jump when the character is underneath or to the right of the Egg Mobile, or the resulting bounce may be enough to throw the character off into open space and cause an instant death.

During this phase, it should be noted that the clock has stopped. One can also not remain in a Super State/Hyper State during this phase.

After eight hits, the Egg Mobile will explode, followed by the Death Egg itself, and the Master Emerald will drop onto the platform next to the player’s character, marking the end of the fight. After that, one of the following things will happen, each of which depends on the player's progression through the game and their chosen character for the boss fight:

  • If the player has chosen Sonic as the playable character, and is in possession of all of the Super Emeralds, the game will progress to The Doomsday Zone with the best ending.
  • If the player has chosen Sonic as the playable character, and is in possession of all of the Chaos Emeralds, but not all the Super Emeralds, the game will progress to The Doomsday Zone with the good ending.
  • If the player has chosen Sonic as the playable character, but is missing some of the Chaos Emeralds, the game will go to the regular ending.
  • If the player has chosen Tails as the playable character, and is in possession of all of the Super Emeralds, the game will progress to the good ending for Tails.
  • If the player has chosen Tails as the playable character, but is missing some of the Chaos Emeralds, the game will progress to the normal ending for Tails.
  • If the player has chosen Knuckles as the playable character, the game will go back to the Sega logo and then the title screen, without an ending sequence, due to how he is not supposed to actually fight the Giant Eggman Robo and can only do so with cheats.



Name Artist(s) Version Length Music Track
"Boss The Boss" Sega Sonic the Hedgehog 3/Sonic the Hedgehog 3 & Knuckles 1:50
Sonic & Knuckles Collection "FM Synthesizer" 1:42
"General MIDI" 0:57


  • Only the upper part of the robot's body is ever visible; the lower body, legs, and arms are never shown.
  • The right eye of this robot is different than the left one. It may be used by Robotnik as a pointer, or it might be the EggRobo assisting him in controlling the machine.

A Giant Eggman Robo-like droid in Sonic & Sega All-Stars Racing.





  1. Flynn, Ian; Sega (8 December 2021). Sonic the Hedgehog Encyclo-speed-ia. Dark Horse Books. p. 55. ISBN 978-1506719276. "Bosses: Act 2 - Giant Eggman Robo. The towering mecha attempts to crush you under its fingers. Smash them apart, and Dr. Eggman begins chasing you, using the Master Emerald to power a devistating laser while its "nose" acts as a flamethrower. After its destruction, Dr. Eggman tries to flee. Chase him down as the last of the Death Egg falls the pieces beneath your feet!"
  2. (in Japanese) ソニックメガコレクション最強攻略ガイド. Shogakukan. 1 March 2003. p. 188. ISBN 978-4091060907.
  3. 3.0 3.1 (in Japanese) ソニックジャム オフィシャルガイド. SoftBank. 2 October 1997. p. 90. ISBN 978-4797303377.

Main article (Blue Sphere, Knuckles in Sonic 2, Sonic 3 & Knuckles) | Credits | Manuals | Beta elements | Gallery